Renovating a house in the UK in 2026 costs anywhere from £600 to well over £3,000 per square metre, depending on what you’re doing and how thoroughly you’re doing it. Those numbers sound impossibly wide until you understand what drives them, and once you do, budgeting becomes far more reliable.

This guide breaks down costs by specification level, by room, and by the line items most people forget to include. Figures reflect 2026 UK market rates and apply to England and Wales unless noted otherwise.

The Three Specification Levels: and What They Cost

The single most important variable in any renovation budget is not the size of the house: it is the specification level. Across the UK industry, renovation work broadly falls into three bands.

Specification LevelWhat It CoversTypical Cost Range (£/m²)Example: 80m² terrace
Light refurbishment (cosmetic)Redecoration, new flooring, replacing kitchen and bathroom fittings in existing positions, no structural work£600–£1,200/m²£48,000–£96,000
Full refurbishmentAll of the above plus rewire, new heating system, replumbing, new windows, some wall reconfigurations£1,200–£2,000/m²£96,000–£160,000
Structural / extensionNew openings, RSJ beams, extensions, loft conversions, major drainage alteration, or basement work£2,000–£3,500+/m²£160,000–£280,000+

These are total project costs including materials, labour, and the trade packages below. They do not include professional fees (architect, structural engineer, Building Control) or VAT, which are addressed separately.

Most properties purchased as renovation projects fall into the full-refurbishment band. Light refurbishment applies to well-maintained homes that just need freshening up; structural work applies when the layout is being changed or the building extended.

What Drives the Cost Up (or Down)

Location

London and the South East carry a 20–40% labour premium over the rest of England. A job quoted at £150,000 in the Midlands will typically run £180,000–£200,000 for equivalent work in inner London. Scotland has broadly similar rates to northern England.

Services: Electrics, Plumbing, Heating

A full rewire on a three-bedroom house costs £6,000–£12,000 in 2026.1 A complete replumb (copper or plastic pipework throughout, new unvented cylinder or combi boiler) adds another £5,000–£10,000. These two items alone account for a significant portion of the full-refurbishment uplift over light-refurbishment costs. If the previous owner had the services done recently, your budget looks very different.

Structural Alterations

Removing a load-bearing wall to create an open-plan kitchen-diner is probably the most common structural intervention in UK renovation. The steel beam itself (RSJ supply and install, including propping, padstones, and making good) costs £2,000–£5,000 per opening. Structural engineer calculations add £300–£600 per beam. Multiple openings stack up quickly.

Existing Condition

Older properties, pre-1950s in particular, almost always reveal problems once strip-out begins: wet rot in floor joists, asbestos in textured ceilings, lead pipework, inadequate foundations under extensions, rising damp. Budget a 15% contingency rather than the 10% commonly recommended for newer properties.

Specification of Finishes

A mid-range kitchen (supply-only) costs £8,000–£15,000. A high-specification kitchen from a bespoke joiner costs £25,000–£60,000 and up. The same principle applies to bathroom suites (£800 vs £4,000 just for sanitaryware), flooring (vinyl plank at £25/m² vs engineered oak at £80/m²), and lighting. Finishes affect the budget enormously but do not change the structural, services, or labour costs.

Cost by Room

The figures below are for a typical mid-specification finish. They represent supply and fit, not supply only.

RoomLowMidHighWhat Drives the Range
Kitchen (incl. electrics, plumbing, fitting)£12,000£22,000£50,000+Units, worktop material, appliances
Bathroom (full replacement)£5,000£9,000£20,000+Sanitaryware spec, tiling, underfloor heating
En-suite (new build-out)£4,000£7,500£15,000+Plumbing runs, size
Living room (cosmetic refurb)£2,500£5,000£12,000+Flooring, fireplace, alcove joinery
Bedroom (cosmetic refurb)£1,500£3,000£7,000+Wardrobes, flooring
Rewire (whole house, 3-bed)£6,000£9,000£12,000Number of circuits, consumer unit type
Replumb + boiler replacement£5,000£8,000£12,000Boiler type (combi vs system), cylinder
New windows (whole house, 8–10 units)£6,000£12,000£25,000+uPVC vs timber vs aluminium
Plastering (whole house)£3,500£6,500£9,000Existing wall condition
Decoration (whole house, 3-bed)£3,000£5,500£9,000Number of rooms, finish level

These figures can be used individually for partial renovations. For a whole-house refurbishment, do not simply add them up: there are sequencing efficiencies when trades work across the whole property simultaneously rather than room by room.

Professional Fees and Statutory Costs

These sit outside the contractor budget and are frequently forgotten at the budgeting stage.

  • Structural engineer: £300–£600 per beam calculation; £600–£1,200 for an extension or loft package
  • Architect or architectural designer: typically 5–10% of construction cost for a full service; drawing-only packages start at £1,500–£3,0002
  • Planning application fee: £548 for a householder application in England (from 1 April 2026); more for larger works34
  • Building Control (full plans application): £800–£2,000 depending on local authority and project scope
  • Party wall surveyor: £800–£2,500 per property affected if your neighbours require a surveyor
  • Skip hire: £250–£500 per skip; a full house clearance typically requires 3–5 skips
  • Asbestos survey: £300–£600 for a management survey; £500–£1,200 for a refurbishment/demolition survey (required before strip-out on pre-2000 properties)56
  • VAT: most building work on existing residential properties is standard-rated at 20%. Conversions of non-residential buildings to residential use attract the 5% reduced rate. New build is zero-rated.7 Always clarify VAT treatment with your contractor before signing.

The Contingency Question

Industry guidance for new build is 5–10% contingency. For renovation, particularly older properties, 15% is more realistic, and 20% is not overcautious if the property is pre-1930 and has not been significantly updated since.

Where does contingency go? The most common calls on it, in rough order of frequency:

  1. Hidden structural problems found during strip-out (rot, settlement, failed lintels)
  2. Services that need full replacement when a partial replacement was assumed
  3. Asbestos or hazardous materials requiring specialist removal
  4. Programme delays that extend your temporary accommodation costs
  5. Specification changes, upgrading tiles, adding underfloor heating, changing the kitchen layout mid-project

Contingency is not a buffer for overspending on finishes, it is genuine risk money. Keep it separate from your finishes budget.

Using a Cost-per-m² Estimate Reliably

The £/m² figures in this guide apply to the gross internal area (GIA) of the property, every floor, including hallways and landing. To use them:

  1. Measure the floor area of every habitable level (exclude garages unless converting)
  2. Multiply by the appropriate band, light, full, or structural
  3. Add the professional fees and statutory costs listed above
  4. Add 15% contingency on the construction cost
  5. Add VAT where applicable

A worked example: a 95m² Victorian semi undergoing full refurbishment (rewire, replumb, new boiler, new kitchen and two bathrooms, replastering, decoration, new windows, one load-bearing wall removed):

  • Construction cost at £1,400/m²: £133,000
  • Structural engineer (2 beams): £900
  • Architect (drawings only): £2,500
  • Building Control: £1,200
  • Party wall surveyor (1 neighbour): £1,200
  • Asbestos survey: £500
  • Skips and sundries: £2,000
  • Subtotal: £141,300
  • Contingency at 15%: £21,000
  • Total before VAT: £162,300
  • VAT at 20% on labour-only portion (approx. 45%): ~£14,600
  • Realistic budget: £177,000

How to Keep Costs Under Control

Fix the scope before you fix the price. The most reliable way to overspend is to change the scope mid-project. Agree your specification in detail, down to tile sizes and socket positions, before work starts. Changes on site cost roughly three times what they would have cost in the design stage.

Get three comparable quotes. Quotes are only comparable if they are priced against the same specification. Provide every contractor with the same drawings and specification document and ask for a fixed-price quote, not a day-rate estimate.

Sequence trades correctly. Poor sequencing, starting decoration before plastering is fully dry, or having the kitchen fitter on site before second-fix plumbing is complete, creates abortive work and call-out charges that erode the budget quickly. A schedule of works shared with your contractor before work starts is the single best preventive measure.

Buy materials early. Supply chain disruption has eased since 2022, but bespoke windows, certain tiles, and engineered timber flooring still carry 6–12 week lead times. Materials ordered late either delay the programme (costly) or get substituted (often disappointing). Order long-lead items as soon as design is confirmed.

Do not underestimate the cost of living elsewhere. If you cannot live in the property during works, add storage costs (£100–£200/month), temporary accommodation (£1,000–£3,000/month depending on location), and the time cost of managing the project remotely. For a 20-week renovation in London, temporary accommodation alone can add £20,000–£60,000 to the effective project cost.

References (7)

Figures in this note were checked against the sources below on 7 September 2026. Superscript numbers in the text point to them. Every source the site cites, by topic.

  1. 1technicalfairWhich?, guidance.RN-GKKYNIWhich? on what electricians charge, with average costs for common jobs from fitting a light to a full rewire, and guidance on hiring. Which? surveys consumers rather than measuring work, so these are reported averages: a reasonable sanity check against the JIB agreed rates, and not a build-up.
  2. 2technicalfairHomeOwners Alliance, guidance.RN-FTIV36HomeOwners Alliance on architect fees, giving a range of roughly 3% to 15% of construction cost and explaining what moves it: the RIBA work stages taken on, whether the architect runs the build, and the size of the job. Useful for the shape of the fee, because a percentage quoted without saying which stages it covers is not comparable with another percentage.
  3. 3technicalvery strongMinistry of Housing, Communities and Local Government (GOV.UK), a government page.RN-JM9I1NThe schedule of planning application fees in England from 1 April 2026. Fees rise annually with the September CPI under the 2023 amendment regulations; September 2025 CPI was 3.8%, so every fee from April 2025 rose by that and is charged from 1 April 2026. The table lists the new amount for each application type, which is the statutory figure a council must charge rather than a guide price.
  4. 4costvery strongPlanning Portal, guidance.RN-M2KUCTA price, true at 2026-04. The Planning Portal's consolidated guide to planning application fees in England from 1 April 2026, built from the 2012 fees regulations as amended and MHCLG's annual indexation. More usable than the regulations themselves because it puts each application type next to its current fee and its definition. The statutory amounts are in the regulations; this is the readable index to them.
  5. 5technicalvery strongHealth and Safety Executive, guidance.RN-W6ISC0HSE's definition of the two asbestos survey types, which is the correction for notes that invent a third or call it an R&D survey as though that were the formal name. A survey aims to give accurate information on the location, amount and condition of asbestos-containing materials, assess damage or deterioration and whether remedial action is needed, provide the information to produce an asbestos register and an asbestos management plan, and identify hidden ACMs to be removed before refurbishment work or demolition. There are two types: a management survey, whose main aim is to let the dutyholder produce the register and management plan and manage ACMs during normal occupation and use, and a refurbishment or demolition survey, which is the one needed before invasive works. Both types are likely to require sampling.
  6. 6technicalvery strongHealth and Safety Executive, guidance.RN-FP89A0HSE on finding out whether asbestos could be present: if the building was built or refurbished before 2000, assume there is asbestos in it. That single instruction is the practical rule for renovation, and this page is where it comes from rather than a contractor's version of it.
  7. 7technicalvery strongHM Revenue & Customs, guidance.RN-KBNHMBHMRC's main VAT notice for building work, last updated 26 August 2026. Sets out that construction of a new building and work to an existing building is normally standard rated at 20%, with exceptions: 0% for new qualifying dwellings and for housing association conversions of non-residential buildings, and 5% for a 'changed number of dwellings' conversion (section 7) and for renovation or alteration of a dwelling not lived in during the 2 years immediately before work starts (section 8, conditions at 8.1.2 and 8.3). Cites the law: VAT Act 1994 section 30 and Schedule 8 Group 5 for zero rating, section 29A and Schedule 7A Groups 6 and 7 for the reduced rate. Also explains the developer input tax block on goods that are not building materials (VAT (Input Tax) Order 1992 articles 2 and 6) and points self builders to the DIY housebuilders refund scheme.

  1. How much do electricians cost?, Which?, accessed 7 September 2026. which.co.uk

  2. Architect Fees - And How To Cut Them In 2026, HomeOwners Alliance, accessed 7 September 2026. hoa.org.uk

  3. Fees for planning applications in England from 1 April 2026, Ministry of Housing, Communities and Local Government, accessed 7 September 2026. assets.publishing.service.gov.uk

  4. A guide to fees for Planning Applications in England, 1 April 2026, V2026, Planning Portal, accessed 15 September 2026. Priced at 2026-04, so no calibration is needed. ecab.planningportal.co.uk

  5. The duty to manage asbestos in buildings: Arrange an asbestos survey, Health and Safety Executive, accessed 7 September 2026. hse.gov.uk

  6. The duty to manage asbestos in buildings: Find out if asbestos could be present in your building, Health and Safety Executive, accessed 7 September 2026. hse.gov.uk

  7. Buildings and construction (VAT Notice 708), HM Revenue & Customs, accessed 7 September 2026. gov.uk