Getting Started
158 sources in the library on getting started. 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 4 of 4.
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HomeOwners Alliance
Roof condition, life and repair costs. A well maintained stone slate roof can last 100 years or more; RICS warns the common belief that felt flat roof coverings last only 10 to 15 years is a misconception, that felt roofs of that age can go on performing if maintained and protected with gravel or solar reflective paint, and recommends inspecting a flat roof twice a year in spring and autumn plus after storms. Checkatrade repair costs for a 1 m2 area: flat roof £100, pitched clay tile £180, pitched concrete tile £140, pitched slate £170, rising to £1,465, £1,245 and £1,395 respectively where the felt is replaced too. Flat roof repair about £100 per m2. Replacement tiles from about £200, flashing repair from about £250 a metre. Extra joists for an overloaded roof structure £1,000 to £2,000, and a waterlogged and sagging roof structure £5,000 to £12,000. Scaffolding adds about £625 a week, a rooflight £800 to £1,000. Building control approval is not required where less than 25% of a roof is renewed, and is required above that.
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HomeOwners Alliance
Garage conversion costs and the headroom constraint. A 15 m2 conversion averages around £14,250, with a typical range of £8,500 to £20,000 depending on structural changes, plumbing and new services. Virgin Money estimates converting a garage into an ensuite bedroom can add 20% to a property's value. On dimensions, the finished floor needs to sit about 15cm above external ground level and around 2.2m to 2.4m of headroom is needed above it, so a low garage ceiling may have to be raised.
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HomeOwners Alliance
Costs and the permitted development envelope for a garden room. Modular buildings £2,000 to £30,000; bespoke £800 to £1,600 per m2. Professional construction typically takes 4 to 6 weeks, with a small shed sized room in one to two weeks. To stay within permitted development the building must be single storey with eaves no higher than 2.5m and an overall height no more than 4m for a dual pitched roof or 3m for any other roof, dropping to a 2.5m maximum height anywhere within 2m of a boundary, with no veranda, balcony or raised platform over 0.3m. Occasional use of a sofa bed is fine, but regular sleeping or a self contained annexe needs planning permission and building regulations approval.
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HomeOwners Alliance
A homeowner tendering procedure with the numbers attached. Aim for at least 3 quotes, which means shortlisting at least 5 builders to invite, since some will not respond. Distinguishes an estimate, an informal educated guess, from a quote, a written agreed price fixed unless the specification changes. Allow between two and four weeks for the tender period, confirm by phone who is bidding, and circulate every answer to all tenderers. Tender returns should include public and employers liability insurance evidence, health and safety policy and record, a bank reference, a professional reference such as from an architect, a customer reference, previous work, years established, and whether employees or subcontractors are used. For the contract: consider a 5% retention held to the end to cover snagging, name the contract period and set weekly liquidated damages, typically £250 to £500 a week on an extension, and list provisional sums for unforeseen work.
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HomeOwners Alliance
Costs, tax and value for a residential annexe. A new detached granny flat costs around £90,000 on average per Checkatrade, varying with size, specification and site. On council tax, an annexe occupied by a relative or by a resident of the main house can attract a 50% discount, to be confirmed with the local council. On value, building an annexe can raise the property's worth by 20% to 30% per Checkatrade, depending on size, finish and location. Also covers when planning permission and building regulations are triggered by self contained accommodation.
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HomeOwners Alliance
Ten improvements with spend against value added, from HomeOwners Alliance research with the Federation of Master Builders and The Guild of Property Professionals. Removing an internal wall for an open plan kitchen diner costs around £3,500 and adds £48,000 in London or £27,000 in Dorset, and most builders finish it in under a week. Garden room £6,700 adds £36,000 in Surrey or £10,000 in London. Kitchen refresh £4,000 adds £15,000. Downstairs loo in an understairs cupboard £1,500 adds £26,000. Ensuite carved from a master bedroom £5,000 adds about £14,525 in London over roughly 11 days. Off street parking £2,000 adds £13,354 on an average Surrey property, with Direct Line putting a parking space at up to 13% of value. Back garden £4,000 adds £9,000. Repainting £1,000 adds £5,000. Loft conversion £20,000 adds £40,000. Obtaining planning permission costs up to £400 and can add up to 10% of value per Hamilton Fraser.
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HomeOwners Alliance
Window replacement process, cost and paperwork. Average price £500 to £3,200 per window depending on type, size and material. Installers usually take a deposit of 10% or 20% on order to buy the products and book the slot. Expect at least 3 to 4 windows fitted per day, longer for timber windows needing priming and painting. Windows fitted more than 10 years ago, even double glazed, are behind current glazing performance. A replacement FENSA or CERTASS certificate can be ordered by postcode from either scheme's website for around £25.
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HomeOwners Alliance
How a restrictive covenant can stop an extension even where planning permission is granted. Explains the practical safety valve: where an owner has been in breach for over 12 months without challenge and then wants to sell, restrictive covenant indemnity insurance should normally be available to protect what has been done. States that the conveyancing solicitor is responsible for identifying covenants, so a missed covenant can be taken to the Legal Ombudsman, which can order compensation up to a maximum award of £50,000.
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HomeOwners Alliance
Whole house renovation cost benchmarks. Full structural survey £500 to £1,500 and a 10% contingency on the total. Single storey extension £1,800 to £3,000 per m2 with the rate falling as area grows, giving roughly £40,000 to £56,000, £60,000 to £84,000 and £100,000 to £140,000 for successively larger extensions. Loft conversion £27,500 to £75,000 with a dormer averaging £50,000. New bathroom average £6,000. New kitchen £10,000 to £20,000, with 10% of households spending over £50,000. Garage conversion average £6,000. Replacement uPVC window about £400 to £600 supplied and fitted per RICS. Installing central heating from scratch in a three bedroom house about £4,000; replacing a combi boiler about £2,700 per British Gas. Dry rot treatment by a specialist £1,000 to £2,000 per AXA, and woodworm treatment of a three bedroom loft £450 to £800, or £20 to £50 for DIY treatment, with active infestation identified by roughly 2mm holes and fresh sawdust.
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Leeds Beckett University
Two new European Standards for measuring aggregate heat loss from housing were published in 2024 and adopted in 34 countries, led by Professor David Johnston at Leeds Beckett with Professor Richard Fitton at the University of Salford. The standards are built on the Coheating Test developed at Leeds Beckett and, crucially, apply to new and existing real homes rather than laboratory test cells, so the thermal performance of housing can be measured and compared consistently across countries. The work took a decade. This is the standardisation behind the EN 17887 series used by Salford's Energy House Labs.
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Leeds Beckett University, Leeds Sustainability Institute
Coheating test results from 25 new build dwellings built to Part L1A 2006 or better, the study that put a number on the fabric performance gap. The mean measured whole building U-value was just over 1.6 times greater than predicted, and for individual dwellings the gap between measured and predicted fabric performance could exceed 100 per cent, varying with dwelling form and construction type. Context: dwellings account for just under 30 per cent of the UK's total CO2 emissions, against a national target of an 80 per cent cut by 2050 on 1990 levels; around 80 to 85 per cent of the dwellings that will be in use in 2050 already exist. The practical implication for a homeowner is that a design SAP figure or an EPC is a prediction, not a measurement, and a real house can lose over half as much heat again as the paperwork says.
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Leeds Beckett University, Leeds Sustainability Institute
Eight brick cores 100mm in diameter were taken from the outer leaf of solid walled homes across the UK (sites including Bedford, London and Loughborough) and lab tested, then modelled as a 110mm outer brick, 10mm air/mortar gap, 110mm inner brick, 10mm gypsum plaster wall. Results: modelled U-values of the uninsulated solid walls ranged from 1.6 to 2.6 W/m2K with an average of 2.1 W/m2K, against CIBSE Guide A book values averaging 1.7 W/m2K and ranging 1.4 to 2.0 W/m2K, so real bricks lost noticeably more heat than the standard assumption. EPCs assume a single default solid wall U-value of 1.7 W/m2K. Six of the eight homes carried surface condensation risks. Simulated moisture content of the inner brickwork varied between 0.1 and 5.8 per cent, meaning some bricks are at far higher risk of moisture accumulation than others, which is why an identical insulation detail can succeed in one house and fail in another.
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MoneyHelper (Money and Pensions Service)
Four step method for funding a renovation from the government backed money guidance body. Step one: list everything wanted and ask for written quotes rather than estimates, drawing the distinction that a quotation is an agreed fixed price while an estimate is an approximate price that can change; get at least three quotes, compare them in detail, check reviews, and insist on a written costed agreement, with any extra work priced in a written estimate and a revised costed schedule before it is authorised. Step two: pay from savings where possible while keeping a reserve for unexpected costs. Step three: compare the total cost of borrowing over the shortest period, not just the headline rate, and note that a 0% purchase or balance transfer credit card suits small jobs, that tradespeople may not take cards, and that card purchases of parts can attract Section 75 protection. Step four: use the EPC to identify improvements, and check the Warm Homes local grant, the Boiler Upgrade Scheme for heat pumps and biomass, Warmer Homes Scotland (owned or privately rented for at least a year plus qualifying benefits, with an interest free loan alternative), and the Welsh Nest scheme. States that owner occupiers and private tenants with a household income below £23,000 may qualify for grants of up to £7,500, or even £10,000, towards insulation, heating and window glazing.
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NHS
Health background for anyone disturbing asbestos in a renovation. Asbestosis is a rare but serious incurable lung condition caused by asbestos exposure, with treatment aimed only at symptoms. The NHS dates asbestos as a building material used from the 1950s to the 1990s and identifies building and construction work in that period as the main exposure route. Symptoms are shortness of breath, persistent cough, wheezing, extreme fatigue, chest or shoulder pain and, in advanced cases, clubbed fingertips, and it can take 20 to 30 years from exposure before any symptoms appear, with some people having none. Notes that compensation may be claimable.
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Northern Powergrid
Northern Powergrid's published indicative connection costs and timescales, all excluding VAT. Service alteration (moving an existing supply): quotation guaranteed standard 5 days, actual average 4 days, prices from £661 single phase, average £1,000 single phase underground, average 6 weeks to connect after payment. One standard (single domestic) connection: quotation standard 5 days, average 3 days, from £1,300, average £2,500 where no LV mains cable is required, 6 weeks to connect after payment. Up to four standard connections: quotation standard 15 days, average 6 days, from £6,800, average £7,900, 10 weeks. Over four standard connections (based on six premises): quotation standard 25 days, average 27 days, from £4,100, average £14,100, 23 weeks. Unmetered connections: quotation standard 25 days, average 9 days, from £700, average £8,400, 12 weeks. Typical small business connection: from £1,900 for a single premises, average £18,100, 24 weeks. Typical large business connection: from £2,700, average £78,500, 50 weeks. EHV connections: price on application, roughly 2 years to connect.
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Northumbrian Water
The ownership map that decides who pays for a drainage problem. The homeowner owns private drains within the property boundary, including all internal plumbing, gutters, downpipes, gullies, soil stacks, manhole covers and underground pipework serving only that property; private sewage treatment works and septic tanks; shared drains serving flats, such as Tyneside flats or a block within a single boundary, which stay in the owners' shared ownership; and surface water sewers that do not connect to a public sewer, for example draining to a watercourse or soakaway. Northumbrian Water owns all public sewers, usually under roads and footpaths, and most shared sewers where drains from several neighbouring properties join before reaching the public sewer. Since 1 October 2011, under the Private Sewer Transfer Regulations 2011, most existing shared private sewers and lateral drains outside property boundaries transferred to the water company, so a pipe shared with neighbours or running beyond the boundary is often theirs; properties built after 2011 generally stay with the homeowner or developer. The local authority owns highway gullies and drains, the grated openings at the road edge. Reporting line 0345 717 1100.
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Openreach
The commercial rules for getting a new or altered property connected. Openreach installs Full Fibre free of charge for sites with 20 or more premises, and asks for a contribution on sites of 1 to 19 premises, which is the band a self-build or a small conversion falls into. Full Fibre is the default for all new build sites: any plot connected to copper infrastructure instead is charged a flat rate of £2,500 per plot, and since 15 November 2021 Openreach New Sites no longer offers additional copper purely for service lines. Commercial-only sites of 20 or more units also get Full Fibre free. Building regulations now mandate gigabit-ready telecoms infrastructure during construction of new homes, in force in England from 26 December 2022, Scotland from 1 January 2025 and Wales from 1 July 2025. Options beyond FTTP include Ethernet Access Direct via the Network in Advance offering.
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Openreach
The lead time and the money. Register the site at least eight weeks ahead of the site start date, and at least six months before broadband is wanted at the first property. Residential developments with more than 19 plots pay nothing: Openreach installs Fibre to the Premises free. Residential developments of 1 to 19 plots carry a maximum developer contribution for mandatory FTTP of £2,000 per plot; where the true cost exceeds £2,000 per plot Openreach sets out the excess and offers the option to pay it. A Service on Demand payment applies to sites with more than 11 plots. Registration needs the number and type of plots (houses or flats), whether the site is phased or part of a larger development, unique plot numbers, floor plans for every floor including plot numbers and building entrances, a schedule of accommodation, and for 20 or more plots the order of build. Building Regulations 2010 changes require gigabit capable infrastructure in all new homes in England.
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Royal Horticultural Society
Identification, spread and disposal of Japanese knotweed on a renovation site. Stems are bamboo like with reddish purple speckling, conspicuous nodes and hollow centres, usually reaching about 2m (6 and a half feet) by late summer; leaves are spade shaped with flat bases, about 14cm (5 and a half inches) long, set in a zig zag along the stem, with creamy white flower clusters in late summer and early autumn. Rhizomes are thick and woody with an orange layer under the dark brown skin, commonly extending 1m (3 and a third feet) or more down, and a fragment as small as 1cm can grow into a new plant, so digging and careless disposal are the main spread routes; rhizomes can lie dormant in soil for many years. It is listed on Schedule 9 Section 14 of the Wildlife and Countryside Act 1981, so planting or causing it to grow in the wild is an offence carrying fines and imprisonment, and it and any soil containing it are controlled waste under the Environmental Protection Act duty of care regulations, requiring the Environment Agency to be informed, a registered waste carrier, an authorised disposal site and waste transfer permits. On sale and purchase, its presence must be declared on the TA6 form and lenders typically require a professional eradication management plan with a transferable insurance backed guarantee, usually supplied by the seller before completion. Glyphosate based weedkiller is the practical chemical control for a home gardener.
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Scottish Water
Scottish Water is a statutory consultee on planning applications: when outline or full planning is submitted the local authority passes the application to Scottish Water, which along with other public bodies may be asked to comment within 21 days. It advises designing both the water supply and public sewer connections as early in the process as possible. Where a proposal affects existing infrastructure, Scottish Water may recommend a slight change to the plans to avoid building over its pipework, or require the pipework to be diverted so it can continue to access and maintain the network. 24 hour reporting line 0800 0778 778.
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Severn Trent Water
How to get the asset plans that decide whether a build-over application is needed. Water and sewer pipes sit on separate maps, so each dataset is downloaded and charged for separately, with a discount for buying both together; maps are supplied through DigDat, which charges because it overlays detailed utility plans on Ordnance Survey mapping under licence and maintains the asset records. Map charges are set out in the annually updated Charging Arrangement Document. Eligible organisations such as councils, utility companies and government bodies can apply for free statutory access, conditional on proving their role and on not charging the public or reselling the data, which is why a homeowner cannot get the same free access. Severn Trent's Asset Protection team handles planned work near pipes, development queries, ownership questions, insurer-raised issues, sewer defect assessments and subsidence claims.
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SGN (Scotland and Southern Gas Networks)
Two points a homeowner rarely anticipates. First, moving a gas meter can break a smart meter's wireless connectivity: SGN will alter the supply pipe and move the meter, but if connectivity is lost the energy supplier may need to visit to re-establish it and that visit may be chargeable, so the supplier should be told about the plans before the alteration is booked. Second, SGN runs a Help to Heat scheme offering free or discounted new connections to households struggling to pay energy bills and keep their home warm, with an online eligibility check. The same route covers new connections, alterations and disconnections for household and business customers, all quotable online, and the page explains the meter point reference number (MPRN) used to identify a gas supply.
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SP Energy Networks
Confirms a domestic EV charge point can be connected, but that an ENA application form must be completed through the industry Connecting to the Networks portal before or at installation; once SP Energy Networks receives that notification it contacts the customer to discuss requirements. The company publishes a low carbon technology customer leaflet in English and Welsh covering the same journey. Practical point for a homeowner: the notification is made through the national ENA route rather than direct to the network operator, and the installer normally submits it.
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SP Energy Networks
The notification route for a domestic heat pump, which is a connect-then-notify process rather than an application. Start by asking an accredited heat pump installer to confirm the electricity supply is adequate; provided the internal wiring, the supply and the cut-out are all satisfactory, the heat pump can simply be installed. After installation the customer, or the installer on their behalf, notifies SP Energy Networks by completing a form and emailing it to lctapplicationnorth@spenergynetworks.co.uk for Central and Southern Scotland or lctapplicationsouth@spenergynetworks.co.uk for Merseyside, Cheshire, North Wales and North Shropshire. SP Energy Networks needs the notification to manage network demand and keep supplies secure. Context given: the UK Government target of up to 600,000 heat pumps installed per year by 2028 as part of Net Zero by 2050, with the Scottish Government targeting 2045. Three types are covered, air source, ground source and hybrid.
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Thames Water
What drives the price of a new water connection: the size of the pipe being laid, which is 25mm or 32mm for a house though commercial properties need larger, and the distance from the property boundary to the nearest water main, which is estimated from a site plan bought from the local authority or Thames Water's property searches team. Charges cover laying new pipework from the main to the boundary only, are updated on 1 April each year, and are split into a connection charge and a pipe-laying charge. Ofwat publishes the median UK connection charge as a benchmark, though costs in and around London run higher. Barrier pipe may be specified where contamination is possible, and the charging tables carry separate barrier and non-barrier sections; typical locations named are near garage blocks, petrol stations, cemeteries, railways and industrial sites. For a 25mm external (20mm internal) connection a manifold connection may be cheaper. Lead pipework belonging to Thames Water is replaced free of charge with the same diameter up to 25mm. Signs of an unsuspected shared supply with a neighbour: the stopcock is in a communal area, or flow drops at peak times such as 7 to 8am or children's bedtime.
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Thames Water
Lead in water pipes has been banned since the 1970s, so a home built after 1970, or one fully re-piped since 1970, is unlikely to have lead. The mains themselves are not lead and there is virtually no lead in water leaving the treatment works; the risk is the supply pipe to the property or internal plumbing. Identification test for a homeowner: unpainted lead pipe is dull grey, joints are rounded and swollen where two pipes meet, a scratch reveals shiny silver metal, and tapping gives a dull thud rather than the clear ring of copper or iron. Look at the pipe feeding the internal stop valve, typically under the kitchen sink, behind kitchen units or in the understairs cupboard. Thames Water doses most of its water with a small amount of phosphate, which coats the pipe like limescale and lowers dissolved lead; it says that dose is around 500 times lower than the phosphate level in milk. Homeowners are warned not to disturb lead pipework because that raises lead content. Where samples show elevated lead the company will only replace its own communications pipe; the customer-side pipe is the owner's, though a lead replacement scheme is offered. Sampling line 0800 316 9800.
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Thames Water
The step-by-step clock and the inspection rules for a new water supply. Thames Water aims to issue a quote within 28 days of receiving the completed application form and fees; the quote covers only its work between the property boundary and the water main, with everything on private land the applicant's responsibility, and the charge is cost-recovery. Allow 5 working days for payment to be processed and another 5 working days for the company to process the pipework notification. Any plumber may lay the supply pipe, but Thames Water recommends a WaterSafe approved one, because if the plumber is not WaterSafe approved a water regulations inspection must be booked (0800 009 3921) and the company aims to visit within 7 working days. A chlorination procedure is required for pipes 63mm or over, which does not apply to a typical house, since a home usually needs 25mm or 32mm. For a genuinely new supply, billing account setup follows within 60 days. A 2026/27 online calculator gives a preliminary estimate, with the caveat it can take up to 28 days to receive a real quote.
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Thames Water
Applying for a water meter is free. Thames Water aims to fit the meter outside the property within 50 days of the request; if that is not possible it looks at fitting inside, so the internal stop valve must be accessible for the visit. Installation may be refused where there is limited space, unsuitable pipework, or the property is on a shared supply, all three of which are common in older terraces and converted flats and are worth checking before planning a bathroom or kitchen around a meter position. Eligibility extends to the bill payer and to tenants with a tenancy of six months or more. A metered bill combines measured water and wastewater volumes with fixed charges for providing the services.
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Thames Water
Surface water drainage is charged as part of the wastewater bill and covers rainwater running off the roof, driveway or garden into the public sewer. Where surface water instead goes to a soakaway or a nearby stream and the property is not connected to the public sewer for surface water, a rebate can be claimed. The homeowner test given is to follow where the gutters lead: if there is a manhole cover close by, the surface water probably drains into a sewer. The bill states whether a surface water drainage charge is being made or a rebate is already applied. A successful rebate can be backdated up to six years, even if the customer has lived at the property longer. Relevant to anyone fitting a soakaway, a permeable driveway or a rainwater harvesting system, because the drainage change can also reduce a standing charge.
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The Leasehold Advisory Service (LEASE)
What a leaseholder must do before altering a flat. Landlord consent may be needed even where planning permission and building regulations approval are already held. Alterations include structural work such as removing a wall or extending, non structural work such as moving radiators or replacing carpet with wooden floors, and safety critical work such as replacing a flat entrance fire door or changing gas pipes or wiring. Leases either prohibit alterations, allow them, allow them with written consent, or allow them subject to licence conditions such as approving contractors, proof of building regulations compliance, or a deed varying the lease. Flags the demised versus retained premises distinction: the landlord usually owns the roof, external walls, structural walls, shared floors and ceilings, chimneys and flues, so a dormer, skylight, balcony, knock through or wood burner flue touches retained premises. Common restrictive clauses are 'no cutting of external walls' and 'floors must be carpeted'. Where consent is required, the landlord must reply in writing, must not refuse without reasonable grounds, and must state reasons, unless retained premises are involved. Allow the landlord a reasonable response period, suggested as around 2 weeks. Consent fees are administration charges, so must be reasonable and accompanied by a summary of rights. Charging a premium for non structural alterations requiring consent is unlawful, but for work affecting retained premises a premium based on a share of the uplift in value can be charged, with no legal cap and no tribunal challenge. Unauthorised alterations run with the land, bind a later owner, and make the flat harder to sell, remortgage or insure.
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UK Power Networks
Explains why a short move is not a cheap move: the price is effectively distance-independent at the small end, and even moving the supply 10cm inside the property still attracts a minimum charge, because the service cable running under or over the house has to be dug up and physically moved rather than pulled through. A qualified electrician is qualified to move the fuse box and to work on internal wiring, but is not trained or permitted to work on the electricity supply or the meter; the incoming cable from the road can only be moved by the DNO's own engineers. UK Power Networks offers an online cost indicator that takes about 5 minutes rather than publishing a flat price list.
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United Utilities
The government banned lead in water pipes in 1970, so a property built after 1970 will not have lead pipework; anything built before 1970 may still have a lead supply pipe underground and lead pipe inside. The greatest health risk is stated as being to children under six and pregnant women. Mains are not lead and water leaving the treatment works contains virtually no lead; the lead is picked up in the customer's own pipework or in the connecting pipe. Identification checks at the internal stop tap, usually behind kitchen cupboards or in a downstairs toilet: unpainted lead pipe is a dull grey; there is often a swollen joint next to the tap; tapping with a metal object gives a dull thud where other metals ring clearly. Explicit correction of a common myth: boiling the water does not help and will not remove lead. Do not knock or disturb lead pipes, which raises lead levels. The permanent fix is an application to United Utilities' Lead Replacement Scheme, after which replacement is done by a WaterSafe approved plumber.
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University of Portsmouth
A year-long practical test of rising damp on walls built from different mortars, compared against theoretical models. Findings: mortar characteristics significantly affect the height to which damp rises, and the rate of water absorption into the mortar is the key factor determining the height of the rising damp front, with a strong correlation to the Sharp Front Model. A second measured result is useful for diagnosis: walls that had received rising damp treatment were warmer than the untreated control walls, because reducing surface moisture removes the evaporative cooling effect, which is why a damp wall reads cold to the touch and on a thermal camera. The paper reviews the controlling mechanisms of capillary effect, water absorption, evaporation and salt formation.
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University of Salford
Measured results from two prototype Future Homes Standard houses built inside the Energy House 2.0 climate chamber in January 2023. The headline finding is the size of the performance gap: the two homes, built by different methods, showed a difference of only up to 8 per cent between designed and actual measured performance, against a stated typical range for new build homes of 5 per cent to 140 per cent of design specification. Airtightness on one house was measured better than design values with low heat loss. Running cost effect: the design-to-actual difference on eHome2 equated to £4.50 per month, giving a running cost of £88 per month. The chamber can reproduce conditions found across 95 per cent of the earth's inhabited land, from -20C to 40C with rain, wind, snow and solar, and holds temperature to within 0.5C. Context stated: the Future Homes Standard applies to new UK homes from 2025 and targets 80 per cent fewer carbon emissions than homes built to the 2013 regulations. The research team's conclusion is that small human errors have disproportionately large effects in a highly efficient home.
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University of Salford, Energy House Labs
Specification of one of the largest purpose-built building performance test laboratories in the world, opened in 2023. Two large-scale environmental chambers control temperature from -23.5C to +51C plus humidity, with weather rigs that can be placed on buildings inside. The chambers are green field sites: any type of property can be built inside, hangar doors admit construction plant, and earth pits allow real foundations to be dug so builders work as they would on site. Sensor arrays are cast into the properties as they are built. The lab's heat loss testing follows EN 17887-1:2024 (in situ testing of completed buildings, data collection for aggregate heat loss test) and EN 17887-2:2024 (steady-state data analysis for the same test).
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University of Strathclyde, Energy Systems Research Unit
Modelled conclusions on retrofitting the Scottish stock. Greenhouse gas reductions were achieved at every retrofit level through reduced energy demand, and at scale the cost of retrofit could be competitive with conventional responses to rising demand such as building more generation. Going deeper, the modelling showed it is possible to feed a high percentage of buildings with low carbon heat without any increase in electricity demand, a system-level benefit usually overlooked in individual retrofit decisions. Deep retrofit also raises thermal comfort and indoor air quality and can reduce fuel poverty, which affects around 30 per cent of Scottish households. The delivery model judged most promising for scale is EnergieSprong, largely because its financing offsets cost against current energy bills and recycles the saving into further retrofit, following the developed market in the Netherlands.
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University of Strathclyde, Energy Systems Research Unit
A breakdown of the Scottish housing stock drawn from the 2015 Scottish House Condition Survey, covering dwelling types, ages, heating systems, sizes and U-values. Headline fuel split: 79 per cent of the Scottish housing stock runs on gas, 12 per cent on electricity, and oil and other fuels together account for around 10 per cent. Flats, a category that includes maisonettes, two-storey flats and tenements, make up the highest proportion of buildings in Scotland, which is why communal ownership and shared stairwells shape what retrofit is possible there. Semi-detached houses are described as paired by a common wall and designed to use less space than detached; terraces, common in old industrial towns and popular through the 20th century for high density working class housing, share walls on both sides.
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Wales and West Utilities
A new gas connection for a house or small business starts from £3,912 plus VAT, with the exact price depending on the distance from the existing gas main and any groundworks needed, quoted per address through the online portal. Once payment is made a standard connection typically takes 6 to 8 weeks to complete; the company offers the earliest available date and flags where local traffic management or highway restrictions could extend it. The first step is a postcode check to confirm gas is available at the address at all, then a quote through the portal. Business connections or multiple homes are priced individually on 0800 072 6814. Useful as a benchmark against the alternative of an all-electric heating scheme, since the connection charge alone is often larger than homeowners assume.