Renovation
133 sources in the library on renovation. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 3 of 4.
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The National Archives (legislation.gov.uk)
The instrument that rewrote Part R of Schedule 1 to add the gigabit duties, in force on 26 December 2022 and applying in England. Its Schedule Part 1 renames the heading to Part 9A as "Infrastructure for electronic communications", inserts new exemptions before regulation 44A, amends regulation 44C (the interpretation provision that defines major renovation works), amends regulation 55 (review of Part 9A and Part R), and substitutes Part R of Schedule 1 so that the old single requirement R1 is joined by requirements RA1 (gigabit-ready physical infrastructure) and RA2 (connection to a gigabit-capable network) for new dwellings. It also amends regulations 13 and 14 of the Building Regulations 2010, on the particulars accompanying a building notice and full plans, so the connectivity plan must be submitted, and amends Schedule 1 to the Building (Approved Inspectors etc.) Regulations 2010 to match. A correction slip was issued on 22 November 2022. This is the source that dates the split between Approved Document R Volume 1 (new dwellings) and Volume 2 (other buildings and major renovation works).
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The National Archives (legislation.gov.uk)
The instrument that first put broadband infrastructure into the Building Regulations, creating Part R of Schedule 1 and Part 9A of the Building Regulations 2010, which is why a whole-house renovation can carry a connectivity duty at all. Regulation 1 brings it into force on 6 April 2016, except regulation 2(19)(b) which came into force on 1 May 2016. It extends to England and Wales but does not apply to any building in Wales other than an excepted energy building as defined in the Schedule to the Welsh Ministers (Transfer of Functions) (No.2) Order 2009. Regulation 2 amends the Building Regulations 2010 and regulation 3 amends the Building (Approved Inspectors etc.) Regulations 2010. Cite this alongside SI 2022/984, which later substituted Part R to add the gigabit requirements RA1 and RA2 for new dwellings.
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The National Archives (legislation.gov.uk)
The companion instrument to SI 2021/1391 that created Part S, infrastructure for the charging of electric vehicles. Regulation 1 brings it into force on 15 June 2022 immediately after SI 2021/1391, extending to England and Wales and applying in England. Regulation 2(2) adds requirement S2 to the list in regulation 6(1)(a) of the Building Regulations 2010, so an EV charge point duty is triggered by a material change of use creating dwellings, alongside the existing P1 electrical safety duty. Regulation 2(3) inserts a new Part 9B with regulations 44D and 44E. Regulation 44D sets the cost cap for new residential buildings with associated parking: the number of charge points to be installed is the maximum possible at an average connection cost of GBP 3,600 or less per charge point, and where the cap bites, cable routes must instead be installed in the parking spaces that would otherwise have needed charge points. Regulation 44D(4) sets out how covered car parks are treated, with different rules above and below a threshold of 10 associated parking spaces. Regulation 44E applies requirement S2 to a building undergoing a material change of use into one or more dwellings, where the work touches a car park within the site boundary or the electrical infrastructure serving it, and subject to whether a charge point per dwelling can be accommodated within the incoming supply without upgrading its capacity.
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The National Archives (legislation.gov.uk)
The instrument that made the 2021 changes real, so a note can date them exactly. Regulation 1 sets citation and commencement on 15 June 2022, extending to England and Wales but applying to buildings and building work in England. Regulation 11 amends Schedule 1: it adds "to a reasonable standard" to entry L1(b)(i), inserts new requirement L2 on on-site generation of electricity (systems must be appropriately sized, have effective controls and be commissioned to produce the maximum electricity reasonable in the circumstances), and inserts a whole new PART O OVERHEATING with requirement O1, reproduced in full and carrying NO limits on application. Regulation 4 inserts regulation 4(4) and 4(5), a rule renovation guides almost never mention: where Part L imposes a requirement on the work, then on completion the whole building must comply with Part F or be no more unsatisfactory in relation to Part F than before the work began, so a Part L job such as new glazing or wall insulation drags a whole-house ventilation duty with it. Regulation 8 inserts regulations 40A and 40B, requiring the person carrying out the work to give the owner information about an on-site electricity generation system, and about the Part O overheating provision, no later than five days after completion. Regulation 17 is the transitional provision: the amendments do not apply where a building notice or initial notice was given, or full plans deposited, before 15 June 2022, provided the work started before 15 June 2023.
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The National Archives (legislation.gov.uk), Acts of the Scottish Parliament
SCOTLAND. The primary Act behind Scotland's building standards system, in force as amended to 7 September 2026 with section 36(3) still to be inserted by 2026 asp 14 section 7. Section 4 gives the Technical Handbooks their status as guidance documents and section 5 governs compliance with them. Section 7 creates verifiers and certifiers, sections 8 to 16 the building warrant regime including certification of design at section 11 and late applications at section 15, and sections 17 to 21 the completion certificate regime, with section 19 covering certification of construction and section 21 making it an offence to occupy or use a building without a completion certificate. There is no England-style building notice or full plans choice in Scotland: a warrant is applied for before work starts.
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The National Archives (legislation.gov.uk), Acts of the Scottish Parliament
SCOTLAND, and there is no England equivalent: England relies on leases and service charges where Scotland legislates for flat ownership directly. Sections 1 to 3 fix tenement boundaries and pertinents by default, so ownership of the roof, close and solum is settled by statute rather than by title alone. Section 4 applies the Tenement Management Scheme in Schedule 1 wherever the title deeds are silent, and section 4A lets a local authority pay a share of scheme costs. Sections 7 to 10 abolish the common law of common interest for tenements and replace it with a statutory duty at section 8 to maintain any part providing support or shelter, a prohibition at section 9 on interfering with support or shelter, and a cost recovery right at section 10. Sections 11 to 15 set when liability for repair costs arises, bind successors at section 12, allow a Notice of Potential Liability for Costs at section 13 and give a former owner a recovery right at section 14. Sections 5 and 6 route disputes to the sheriff.
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The National Archives (legislation.gov.uk), Scottish Statutory Instruments
SCOTLAND. The instrument that sets Scotland's building standards, made under the Building (Scotland) Act 2003, and the reason England's Approved Documents do not apply north of the border. Regulation 3 exempts certain buildings and services, regulation 5 introduces the descriptions of work not requiring a building warrant, regulation 8 covers fitness and durability of materials and workmanship, regulations 9 to 12 set the building standards for construction, demolition, services and conversion, and regulation 16 provides for relaxations. Schedule 1 lists exempted buildings, Schedule 3 the warrant-exempt work and Schedule 5 the mandatory building standards that the Technical Handbooks expand.
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The National Archives (legislation.gov.uk), Scottish Statutory Instruments
SCOTLAND. The instrument behind Scotland's EPC reform, replacing the Energy Performance of Buildings (Scotland) Regulations 2008 and underpinning the new-style certificate introduced from 30 April 2028 with a 5 year validity instead of 10. Regulation 1 sets citation, commencement and extent, regulation 2 interpretation, and the following regulations the duties to obtain and produce certificates. Cite this rather than the England and Wales Energy Performance of Buildings (England and Wales) Regulations 2012 for any Scottish property.
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UK Health Security Agency
UKHSA's cold weather health guidance, first published 2 November 2012 and last updated 28 April 2026, applying to England, reference GOV-15292. Establishes the alerting framework a heating or insulation note can anchor to: the UKHSA Cold-Health Alerting system is operated by the Met Office and runs from 1 November to 31 March each year, and this guidance forms the cold weather part of UKHSA's Adverse Weather and Health Plan, whose aim is to protect health and reduce harm from adverse cold weather. Issued in several formats including an HTML main version, an easy read PDF of 8 pages, a British Sign Language video, a two-page print version of top tips, and a poster, with easy-read translations added on 28 April 2026 in Arabic, Bengali, Gujarati, Hindi, Italian, Kutchi, Punjabi, Portuguese, Somali, Tamil and Urdu.
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UK Health Security Agency and Centre for Climate and Health Security
UKHSA guidance published 7 August 2025, applying to England, on the allergens and irritants in indoor air, useful for any note that claims a renovation improves or harms air quality. States that indoor bioaerosols can contribute up to 34 per cent of indoor air pollution, and that people in Western countries spend the majority of their time indoors. Identifies the protein-based allergens as mould spores, which thrive in damp poorly ventilated spaces such as bathrooms and arise from leaks, condensation, poor heating or inadequate ventilation; house dust mites, which thrive in warm humid environments in bedding, carpets and upholstered furniture; and pet dander from skin flakes, urine and saliva. Separately names non-protein respiratory irritants: volatile organic compounds emitted by paints, cleaning agents and air fresheners, and particulate matter from cooking, smoking and open solid-fuel fireplaces. Warns that energy efficiency and adaptation measures can have unintended consequences for indoor environmental quality, and that poorly installed mechanical ventilation can worsen air quality.
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Valuation Office Agency (HM Revenue & Customs)
VOA guidance (published 28 October 2024, updated 7 October 2025) on when a home can be deleted from the Council Tax list during works. Deletion is possible for fully demolished properties, truly derelict properties needing structural reconstruction, and major renovations where significant redevelopment affects most of the property; planning permission alone does not count as work starting. Poor repair (redecoration, minor plaster or ceiling repairs, replacement windows) does not qualify, and an occupied property must always keep a band. Approved deletions are backdated.
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Valuation Office Agency, HMRC (GOV.UK)
Published 22 January 2016 and last updated 15 June 2026, applying to England and Wales, this is the authority that corrects two common claims. First, on rebanding after an improvement: bands are based on the open market price on 1 April 1991 in England and 1 April 2003 in Wales, and if a property has increased in size since it was first assessed it may move to a higher band when it is next sold, so an extension does not trigger an immediate rebanding of the current owner. Second, on Council Tax during works: if the property is occupied the band will not be deleted even if significant repair or renovation works are underway, and only where the property is unoccupied and either beyond repair or undergoing major works making it uninhabitable can the owner apply to have the band removed. Reproduces the full band tables: England Band A up to 40,000 pounds through Band H over 320,000 pounds; Wales Band A up to 44,000 pounds through Band I over 424,000 pounds, Wales having nine bands to England's eight. Assessments are based on size, layout, character, location, change of use and the 1991 or 2003 value, and the Valuation Office does not use property price indexes.
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Welsh Government
The Welsh route to funded adaptations, which differs from England in having a second scheme alongside the Disabled Facilities Grant. A Welsh applicant can apply for support from one or more of the ENABLE support for living independently scheme and the Disabled Facilities Grant, whereas an English applicant has the Disabled Facilities Grant alone. The listed adaptations are widening doors and installing ramps, improving access to rooms and facilities such as stair lifts or a downstairs bathroom, providing a heating system suitable for the applicant's needs, and adapting heating or lighting controls to make them easier to use. Part of the Welsh Government's Home safety, repairs and adaptation collection, with parallel guides for social housing tenants and for adapting a home before returning from hospital.
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Welsh Government (gov.wales)
The Welsh Approved Document L Volume 1, in force until 3 March 2027, and the source for Welsh window figures, which are not identical to England's. Table 10.1 sets, for new and replacement windows and roof windows, a maximum U-value of 1.4 W/(m2K) or WER Band B, with an alternative for replacements of 1.2 W/(m2K) centre pane or low-E secondary glazing, and a threshold U-value for retained windows of 3.3. Rooflights: 2.2 for new and replacement, threshold 3.8. Doors more than 60 per cent glazed: 1.4 or DSER Band C, alternative 1.2 centre pane, threshold 3.3. All other doors: 1.4 or DSER Band B, threshold 3.3. External fire doorsets as defined in Approved Document B Volume 1 may be 1.8. Transitional easements allowed timber windows at 1.6 or WER Band C and timber doors at 1.8 or DSER Band E only where a building notice, initial notice or full plans were given before 23 November 2023. Paragraph 11.35 requires an existing window or door worse than the column (c) threshold to be replaced to column (a); paragraph 11.37 states that windows and doors mean the whole unit including the frame, so replacing just the glazing or the door leaf while retaining the existing frame is not building work and does not have to meet the energy efficiency requirements, though upgrading as close as practicable is sensible; paragraph 11.38 caps the total area of windows and doors at 25 per cent of total floor area where one is enlarged or created.
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Welsh Government (gov.wales)
The Welsh Government landing page that shows which edition of Approved Document L applies in Wales and when. Two editions of Volume 1 (dwellings) sit side by side: the current edition in force until 3 March 2027 at /sites/default/files/publications/2024-05/building-regulations-approved-document-l-vol-1.pdf, and the 2026 edition in force from 4 March 2027 at /sites/default/files/publications/2026-04/building-regulations-approved-document-l-vol-1-2026.pdf. Note the date differs from England, where the 2026 edition of Approved Document L takes effect on 24 March 2027, so a note giving a single UK-wide changeover date is wrong for Wales by three weeks.
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Welsh Government (gov.wales)
WALES. Published 3 April 2017 and not updated since, a 3 MB PDF to be read with the September 2013 amendment slip. This is the Welsh Part P, and it is not the same document as England's 2013 edition. Wales did not follow England in narrowing the definition of a special location, so the scope of notifiable domestic electrical work is wider in Wales. Cite this rather than the England Approved Document P for any Welsh rewire, kitchen or bathroom job.
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Welsh Government (gov.wales)
WALES, and this is a hard contradiction with England. The Welsh Approved Document P states that notifiable jobs include new circuits back to the consumer unit AND extensions to circuits in KITCHENS and special locations such as bathrooms, and that consumer unit replacements are notifiable. England's Approved Document P 2013 edition defines a special location at regulation 12(9) as only the zone around a bath tap or shower head, extending 2.25 metres vertically and 0.6 metres horizontally from a bath tub or shower tray, or 1.2 metres from a shower head where there is none, plus a room containing a swimming pool or sauna heater, so a kitchen is NOT a special location in England and extending a kitchen circuit there is not notifiable. In Wales it is. The Welsh document also confirms replacement, repair and maintenance work is generally not notifiable even in a kitchen or special location, that in large bathrooms the special location is bounded by the walls of the bathroom, and that conservatories, attached garages, detached garages and sheds are not special locations, so work there is notifiable only if it involves a new circuit.
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Welsh Government (gov.wales)
WALES. A Welsh Government collection of quick guides, first published 27 October 2017 and last updated 22 March 2023, saying for each common project whether building regulations approval is needed in Wales. It covers adverts and signs, basements, biomass fuelled appliances, boilers and heating, ceilings and floors, change of use, conservatories, decking, decorations, demolition, doors and windows, drains and sewers, electrics, extensions, external walls, fascias, fences gates and garden walls, flats and maisonettes, flues, fuel tanks, garage conversion, heat pumps, hydro electricity, insulation, internal walls, kitchens and bathrooms, lighting, loft conversions, micro combined heat and power, outbuildings, patio and driveway and paving your front garden. Use it instead of the England Planning Portal common projects pages for any Welsh job.
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Welsh Revenue Authority
Land Transaction Tax replaced Stamp Duty Land Tax in Wales from 1 April 2018 and is collected and managed by the Welsh Revenue Authority for the Welsh Government. First published 21 September 2017 and last updated 25 November 2024. The current LTT threshold is 225,000 pounds for residential properties where the buyer does not own other property, and 225,000 pounds for non-residential land and property. The correction most often needed: there is no first-time buyers' relief in Wales, unlike England and Northern Ireland. Higher residential rates apply where the buyer already owns one or more residential properties, though not normally where they are replacing a main residence. LTT is a self-assessed tax and a return must be sent even where there is nothing to pay, except for certain transactions that need no return. Specific reliefs exist for multiple dwellings, group structures and charities. Since 3 July 2023 solicitors and conveyancers can only file LTT online, and the WRA publishes a postcode checker to establish whether a property is in Wales.
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BRE Group
The catalogue of BRE Digests, Good Building Guides and reports that building professionals cite, with document numbers, authors, dates and prices, which lets a note reference the correct BRE publication rather than BRE in general. Titles include Rising damp in walls: diagnosis and treatment (DG 245, 2007, 15 pounds), Assessment of damage in low-rise buildings with particular reference to progressive foundation movement (DG 251, revised 1995, 15 pounds), Foundation movement and remedial underpinning in low-rise buildings (BR 184, 1991, 35 pounds), Recognising wood rot and insect damage in buildings 3rd edition (BR 453, 2003, 37.50 pounds), Radon: guidance on protective measures for new buildings including supplementary advice for extensions, conversions and refurbishment projects, 2023 edition (75 pounds), Site layout planning for daylight and sunlight: a guide to good practice (BR 209, 2022 edition, 75 pounds, superseding the 2011 edition), External fire spread: building separation and boundary distances (BR 187 2nd edition, 55 pounds) and Wind loads on roof-mounted photovoltaic and solar thermal systems (DG 489, revised 2014, 24 pounds). The BRE U-value Calculator is listed at 0 pounds plus VAT.
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BRE Group
Important currency point for any note mentioning certification schemes: the Home Quality Mark no longer exists under that name. BRE has folded it into the BREEAM product range as BREEAM UK New Construction: Residential, with version 6.1 released in April 2025. HQM led residential sustainability assessment in the UK from 2015 with more than 50,000 homes registered. The scheme assesses homes against three sustainability indicators covering environmental performance (carbon emissions, resource efficiency, biodiversity, circular design), social performance (occupant health and wellbeing, indoor air quality, daylight, thermal comfort, noise, access to green space) and economic performance (efficient use of materials, future-ready infrastructure, running costs, adaptability). Homes are rated on a scale from pass to outstanding. BRE states the certification recognises performance BEYOND minimum regulations only, and that certification can open access to green mortgages and investment incentives. Separately, BREEAM Refurbishment and Fit-Out (currently V7) is the BREEAM standard covering refurbishment rather than new build, and BREEAM has run third-party certified standards since 1990.
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BSI (British Standards Institution)
The standard the conservation trade works to, and the one a listed-building or period-property note should name. BS 7913 is paywalled, so only the BSI catalogue page is public; it confirms the current edition is BS 7913:2013, published 31 December 2013, status Current, ISBN 978 0 580 75778 5, prepared by BSI committee B/560 and classified under ICS 91.040.99. The catalogue page states this is the SECOND edition, updated to align with current best practice, and that the standard describes best practice in the management and treatment of historic buildings, applying to historic buildings both WITH and WITHOUT statutory protection, which is the point most renovation articles miss when they treat conservation guidance as relevant only to listed buildings. Its named audience includes owners, users, occupiers and managers of historic buildings, architects, engineers, surveyors, building managers, conservators, planners and local authority building control officers. The listed descriptors show its coverage: conservation, legislation, maintenance, fire safety in buildings, costs, hazard prevention, inspection, repair, building maintenance, design, renovation, building specifications, contracts and records.
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BSI (British Standards Institution)
Part 1 of the BS 8300 pair, covering the external environment rather than the building. Paywalled, so only the catalogue page is public; it confirms BS 8300-1:2018, published 31 January 2018, status Current. Scope covers key external features within the curtilage of or associated with a building or group of buildings, specifically parking provision, setting-down points, access routes to and around buildings and the approaches to entrances, plus wider external environment matters including street design, landscaping, way-finding and information, horizontal and vertical movement and public facilities. Its named audience is built environment professionals in planning, design and management of the external environment, particularly local authority planners in highways, street enhancement and open space departments, and the page notes it is used in producing Local Development Frameworks, client briefs and contract documents.
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BSI (British Standards Institution)
The accessibility code of practice that Approved Document M sits alongside. Paywalled, so only the catalogue page is public; it confirms BS 8300-2:2018, published 31 January 2018, status Current, and that it is part 2 of a two-part standard, with BS 8300-1:2018 (also published 31 January 2018, also Current) covering the external environment including parking, setting-down points, access routes and approaches to entrances. Part 2 covers external features affecting external access routes, and building interiors including entrances, reception facilities, horizontal and vertical movement and building facilities. Crucially for a home renovation note, the catalogue page states plainly that BS 8300-2 does NOT apply to individual dwellings; its residential scope is nursing, residential and care homes, student accommodation and the COMMON PARTS of blocks of flats. It also confirms the recommendations apply largely to new buildings but can be used to assess and improve existing ones, and that the extent to which they apply to listed and historic buildings is decided case by case.
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BSI Knowledge
BSI's catalogue record for PAS 2035:2023, 'Retrofitting dwellings for improved energy efficiency. Specification and guidance', published 30 September 2023. This is the current edition of the retrofit standard that TrustMark registered businesses must work to for government-funded domestic energy efficiency work. BSI's catalogue records the previous edition, PAS 2035:2019+C2:2021, as published 1 June 2019 and withdrawn on 28 January 2022; that earlier edition's published scope covers assessment of dwellings for retrofit, identification and evaluation of energy efficiency measures, design and specification of individual measures or packages, and monitoring and evaluation of retrofit projects, including fabric insulation and thermal bridging, air-tightness, safe dynamic moisture equilibrium, resistance to water penetration, ventilation and internal air quality, VOC and overheating risks, efficient heating, water heating and lighting with responsive controls, low and zero carbon technologies and on-site energy storage. Cite the designation and edition date from here rather than assuming which version a scheme requires.
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Chartered Institution of Building Services Engineers
The design guide a heating engineer sizes a domestic system from, and the right citation for any note about radiator or cylinder sizing. Publisher CIBSE, status Active, 415 pages, publication date January 2026, ISBN 9781918034196, priced GBP 45 plus VAT for the book and GBP 60 plus VAT for the PDF at standard rate, so the text itself is paywalled and only the catalogue page is public. The catalogue page confirms what the 2026 edition changed: heat loss assessment now follows the BS EN 12831-1:2017 method, domestic hot water cylinder sizing follows BS EN 12831-3:2017 including sizing for storage below 60 degrees C and a thermal disinfection procedure, U-value tables have been updated for modern construction methods, and the latest CIBSE weather data is used with 28 zones and four outdoor design temperatures. It also introduces a System Criteria Document recording design decisions and client and designer sign-off, explicitly in line with the Building Safety Act, plus a new controls section and expanded hydraulic and system configurations. Note the versioning trap: version 2026-02 published in July 2026 supersedes version 2026-01, and CIBSE advises reading the accompanying corrigendum alongside the guide.
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Electrical Safety Roundtable / competent person scheme operators
The single Registered Competent Person Electrical search covering electricians registered to work in households and electrical inspectors registered to carry out electrical safety reports in homes in England and Wales, with both Find and Check functions. States that every electrician listed and permitted to display the mark is registered with an electrical Competent Person Scheme Operator and has been authorised by Government to self-certify that their work complies with Building Regulations, having met strict entry requirements and being regularly assessed for ongoing competence. The single mark and register went live on 30 June 2014 and was officially launched in Parliament on 2 July 2014. Confirms that since 2005 all electrical work in dwellings in England and Wales, whether carried out professionally or as DIY, must meet Building Regulations requirements.
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FENSA Limited
FENSA is a government-authorised scheme that monitors Building Regulations compliance for replacement windows and doors, assessing its approved installers regularly. The legal duty to register a replacement window or door installation with the local council sits with the homeowner; using a FENSA Approved Installer transfers that registration to FENSA, which handles the paperwork and issues the certificate. The FENSA certificate is the document proving the installation meets Building Regulations and has been registered with the council, and it is backed by guarantee insurance. Only FENSA Approved Installers can issue one. This is the source behind the standing advice that a reader should get the certificate at the time of the work rather than hunt for it at sale.
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Financial Conduct Authority
The register to check before accepting finance arranged by a builder, showroom or installer. Confirms that in the UK almost all financial firms must be authorised or registered by the FCA, and that the tool shows both whether a firm is authorised and whether it has permission to provide the specific services being offered. Sets out the tool's limits candidly: it cannot confirm whether Financial Services Compensation Scheme or Financial Ombudsman Service protection will apply, it omits products and services offered only to other firms, published crypto restrictions, historic fines, the right to approve financial promotions and the ability to handle client money, all of which sit on the fuller Financial Services Register along with information on individuals. Notes that certain financial products are not regulated at all and so do not appear, that updates take on average 24 hours, and that some information is supplied by firms so accuracy is not guaranteed.
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Financial Conduct Authority
The regulator's 2026 multi-firm review of the product most often sold as a home improvement loan, published 12 March 2026 and updated 13 March 2026. Establishes the market facts a finance note should cite: second charge mortgages let a homeowner borrow against equity without changing their main mortgage, they are typically less than 4 per cent of regulated mortgage sales, they tend to carry higher interest rates than first charge mortgages, and consumers mostly use them to consolidate debt rather than to fund works. Warns that these customers often carry a high level of debt so a significant proportion may have characteristics of vulnerability including low financial resilience. The FCA reviewed quality of advice, robustness of affordability assessments, the role of intermediaries, record keeping and intermediary fees, sampling firms covering over 40 per cent of second charge advice firms and around 50 per cent of second charge lenders, and found evidence of poor practices creating a risk of poor customer outcomes. Frames expectations against the Consumer Duty and the Mortgage Conduct of Business rules, and follows a 2018 Dear CEO letter to second charge lenders and a 2025 Portfolio Letter to mortgage intermediaries.
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HETAS Limited
HETAS describes itself as a not for profit organisation operating a competent person scheme for installers of biomass and solid fuel heating, together with registration for retailers and chimney sweeps and approval of appliances and fuels. Its site carries searchable registers of registered businesses by postcode or business ID covering retailers, installers, chimney sweeps, servicing engineers and biomass maintenance, plus a separate Removed Business Register for firms no longer registered, and an approved stoves and fuels search. It publishes consumer guidance on choosing a stove, maintenance, and when to have appliances serviced and chimneys swept, and runs Chimney Fire Safety Week, held 7 to 13 September in 2026. HETAS is one of the MHCLG-authorised competent person schemes, so a HETAS registration can be checked rather than taken on trust.
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MCS (Microgeneration Certification Scheme)
How the standards behind MCS certification are set and changed, which matters because MCS certification is a precondition of the main heat pump and solar grants. MCS Standards are owned by the MCS Foundation and governed by the MCS Approval Committee, chaired by the Independent Chair of Standards, David Heath, whose role is to oversee the Technical Working Groups and protect the integrity and impartiality of the Standards. The Approval Committee ensures changes adhere to governance processes and, depending on the type of change, incorporate industry and technical expert feedback through public consultation. Technical Working Groups develop the Standards and many members sit on European committees, keeping MCS aligned with current EN Standards. Two published change processes govern updates: the Technical Document Control Process, reference 455010, for MCS Technical Standards, and the Scheme Document Control Process, reference 184199, for MCS Scheme documents.
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OFTEC, Oil Firing Technical Association
OFTEC's consumer section for buildings not connected to the mains gas network, which it puts at around 20% of UK homes and 65% of Irish homes, with electric heating, LPG, solid fuel or oil heating as the alternatives and oil the most popular off-grid option. Provides a search for OFTEC registered technicians, a certificate ordering service, an explanation of why to choose an OFTEC registered competent person, off-grid heating option guides, a complaints route through OFTEC's compliance services, guidance on insurance for a fuel tank leak, troubleshooting tips, guidance on avoiding heating fuel theft, and funding scheme information. OFTEC is one of the MHCLG-authorised competent person schemes for oil-firing work.
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Royal Institution of Chartered Surveyors
The mandatory standard a UK valuer works to, and the right citation whenever a note distinguishes a survey from a valuation. The Red Book UK national supplement sets specific requirements for applying the RICS Valuation Global Standards to valuations undertaken subject to UK jurisdiction; it was published on 19 October 2023 and came into effect on 1 May 2024, applying to all valuations with a valuation date on or after that. Its references were updated following the updated RICS Valuation Global Standards effective 31 January 2025. RICS defines subject to UK jurisdiction as where performance of the valuation contract is subject to UK statutes, rules and regulations, also considering the jurisdiction in which a claim about the valuation could be brought; the Isle of Man, Jersey, Guernsey and the Republic of Ireland are not part of the UK. The update was made to implement valuation governance amendments from the Valuation Review plus technical updates to public sector, financial reporting and residential content, including a new rotation policy for some regulated purpose valuations. One correction a note should carry: RICS states there is NO new residential mortgage specification. Residential mortgage valuation advice previously sat in VPGA 11 (effective 2019) and before that Appendix 10 of the 2014 edition updated April 2015; the newly updated VPGA 11 sets only high level principles for residential valuation and does not go into significant detail on residential mortgages, and RICS is separately developing a new UK professional standard for the valuation of residential property for owner occupation.
- strong RN-2N0ZXN
Royal Institution of Chartered Surveyors
The landing page for the Red Book, the publication that details MANDATORY practices for RICS members undertaking valuation services and serves as a reference for valuation users. The page confirms the current edition, RICS Valuation Global Standards, became effective on 31 January 2025, and that the Red Book sits on top of the International Valuation Standards (IVS), which are the key global guidance for valuation professionals, with the Red Book UK national supplement applying the Global Standards to UK jurisdiction valuations. Use it to make the point that a Red Book valuation is a regulated, mandatory-standard product distinct from an RICS Home Survey, which is governed instead by the Home Survey Standard, even though a Home Survey Level 2 can be bought in a survey and valuation version.
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Royal Institution of Chartered Surveyors
The RICS scope table for a Level 3 survey, which lets a note say exactly what the surveyor will and will not do rather than repeating marketing copy. For every level, the member inspects roof space no more than three metres above floor level using a ladder where safe and reasonable. At Level 3 specifically the member enters the roof space and visually inspects the roof structure, lifts small corners of thermal insulation to identify its thickness and type and the nature of the ceiling below, and repositions a small number of lightweight possessions where permission is given; attempts to open all windows where permission, keys and safety allow; lifts the corners of loose and unfitted floor coverings and assesses all floors for excessive deflection by a heel-drop test, carrying out an inverted head and shoulders subfloor inspection and entering the underfloor area where safe; lifts accessible inspection chamber covers to drains and septic tanks and observes the drains in normal use; visually inspects all visible parts of the service systems, operating a sample of lights and extractor fans and asking the occupier to operate the heating; and performs a comprehensive inspection of the grounds. Services are never tested, only observed in normal operation, and the member does not perform or comment on design calculations. Appendices A and B of the Home Survey Standard are the benchmark tables the levels are built from.
- strong RN-QSTLXG
TrustMark
TrustMark's homeowner hub, with a searchable directory of registered tradespeople by trade and location plus a guided search. Sets out the hiring process it recommends: step 1, have a clear idea of the work and research the probable cost and timescales, accepting that good tradespeople are in demand and you may have to wait; step 2, obtain 3 quotes before starting any work so you have a range of prices to compare; step 3, ask friends and family for personal recommendations and take references. The site also carries the complaints process, a route to report unsafe electrical work, logo misuse reporting, consumer protection and protected payments, a published suspensions list, retrofit guidance and the energy efficiency scheme routes. TrustMark is the government-endorsed quality scheme, so registration is a checkable credential rather than a paid directory listing.
- strong RN-S96LKB
United Kingdom Accreditation Service
UKAS explains what each sanction means in practice. A suspension is normally temporary, with the body expected to regain accreditation within three months and up to nine in exceptional circumstances. While suspended an organisation cannot provide accredited services, cannot issue new accredited certificates, and must tell existing and prospective customers of its status. Certificates issued before the suspension remain valid unless they were issued incorrectly, though annual surveillance or renewal visits falling inside the suspension period may not be supportable.
- good RN-OFDBVS
AECB (Association for Environment Conscious Building)
The AECB retrofit standard page, and a useful source of real certified-project performance figures rather than manufacturer claims. The standard requires all-round insulation, minimised summer overheating, moisture risk addressed at junctions, and a low carbon heating system, with certifiers trained specifically in moisture and other risks and junctions assessed for moisture. The page lists certified projects with their measured or designed outcomes: Ward Grove, a 1983 to 1992 private house completed 2023, external insulation, triple glazed, MVHR heat recovery ventilation, space heating 37 kWh/m2 per year; Foxlow, a 1900 to 1918 private house completed 2023, wood fibre internal wall insulation, triple glazed, MVHR, space heating 32 kWh/m2 per year and airtightness 1.9 m3/m2.hr; and a Wrexham retrofit of a 1960s house, external insulation, triple glazed, MVHR, space heating 30 kWh/m2 per year. These are the numbers to quote when a note needs a realistic UK deep-retrofit space heating figure. The page also confirms the step-by-step route exists for households retrofitting in phases.
- good RN-AFF4O9
AECB (Association for Environment Conscious Building)
The AECB CarbonLite family, the main UK alternative to Passivhaus for a homeowner who wants a measurable low-energy target rather than minimum Building Regulations compliance. The page names four standards and three supporting guidance documents: CarbonLite New Build for new domestic and non-domestic projects; CarbonLite Retrofit for individual or multifamily homes and non-domestic buildings; CarbonLite Retrofit Step-by-Step, designed principally for retrofitting individual or multifamily homes in stages rather than in one go; and the Water Standard for water efficiency in domestic and non-domestic projects, plus Daylighting design guidance (with an AECB CarbonLite software tool) and Airtightness guidance. Each standard has its own detailed guidance PDF. Two facts worth citing: AECB set up the Passivhaus Trust in 2010, so the two bodies are related rather than rivals, and AECB CarbonLite certified homes qualify for Ecology Building Society C-Change mortgage discounts of up to 1.50 percent off the standard variable rate, applied for the lifetime of the mortgage on completion of the project, which is a rare concrete financial consequence of a voluntary standard.