Full House Refurbishment Costs in London: What to Budget and What to Expect

A full house refurbishment in London covers all of the following trades and work stages — the question is always the specification level within each stage (budget, standard, mid-range, or premium), not whether the stages are included. Strip-out and preparation: demolition of existing kitchen, bathrooms, floor finishes, and any non-structural partitions. In a full gut refurbishment: removal of all plasterboard and plaster back to the structural masonry or frame, removal of all existing wiring and plumbing, and any structural alteration works (chimney breast removal, structural opening formation). Structural works: any structural alterations (removing structural walls, forming structural openings for new beams, chimney breast removals, new structural openings for windows). Damp treatment where applicable (if the survey identifies rising damp, penetrating damp, or structural damp issues). Building Control application for any notifiable structural works. Roofing: repair or replacement of the roof covering, gutters, and downpipes. For a Victorian terrace, this typically means: re-slating or re-tiling of the main roof if more than 20% of slates/tiles are broken or missing; replacing lead flashings at chimney stack and roof junction; replacing plastic gutters with new plastic or cast iron gutters (for period appearance); and clearing and checking all downpipes and hopperheads. First-fix electrical: a full house rewire (new consumer unit to 18th Edition IET Wiring Regulations, new ring mains throughout, new lighting circuits, new dedicated cooker circuit, new boiler circuit, provision for ASHP if a heat pump is being installed, USB sockets to current standard, CAT6a data cabling). Full rewire is required for any Victorian or Edwardian house with original wiring or with a fuse board consumer unit. First-fix plumbing: replacement of all hot and cold supply pipework where the original pipe is lead, iron, or old copper (pre-1970 properties may have lead supply pipes from the street main — replacement is mandatory); new hot water cylinder or combi boiler; new manifold distribution system for more consistent pressure and temperature control; first-fix pipe drops to new kitchen and bathroom positions. Central heating: replacement of the existing boiler (if over 15 years old or inefficient), replacement of all radiators with modern low-surface-temperature or slimline radiators, flush and clean of the heating system, and balance and commission. Plastering: skim all surfaces after first-fix is complete (new plasterboard on new areas and renovation plaster where original lime plaster is retained). Allow 3-4 weeks drying time for newly plastered surfaces before second-fix and decoration. Kitchen: installation of a new kitchen including units, worktop, appliances (note: under RCB's standard approach, the client supplies the kitchen units, worktop, and appliances — the contractor's scope is the installation only plus any plumbing and electrical connections). Bathrooms: installation of new bathrooms including waterproofing, tiling, and sanitary ware (client-supplied). Floor finishes: timber engineered oak or LVT in living and bedroom areas, tiles in kitchen and bathrooms, acoustic mat below hard floor finish on upper floors. Decoration: full decoration (primer, two coats of emulsion to walls and ceiling, gloss or satinwood to all joinery).

The costs below are construction costs (labour and contractor-supplied materials) for a full house refurbishment in London in 2025. Client-supplied second-fix materials (kitchen furniture, appliances, sanitary ware, tiles, floor finishes, light fittings) are excluded from these figures under RCB's standard approach. Cosmetic refurbishment (decoration, new floor finishes, new kitchen supply and install, new bathroom tile and sanitary ware installation, no structural or M&E works): 2-bedroom Victorian terrace (75m²): £20,000-£40,000. 3-bedroom Victorian terrace (100m²): £30,000-£55,000. 4-bedroom semi-detached (130m²): £40,000-£70,000. Mid-range refurbishment (new kitchen layout with some replumbing, one or two new bathrooms, consumer unit upgrade or full rewire, new floor finishes, structural non-load-bearing partition removal, full decoration): 2-bedroom terrace: £55,000-£90,000. 3-bedroom terrace: £80,000-£130,000. 4-bedroom semi-detached: £110,000-£170,000. Full gut refurbishment (strip to shell, full rewire, full replumb, new boiler/heating system, all new bathrooms, new kitchen position and layout, new floor finishes, structural alterations where required, full decoration, possible roof repair): 2-bedroom terrace: £95,000-£150,000. 3-bedroom terrace: £130,000-£210,000. 4-bedroom semi-detached: £175,000-£280,000. Premium full gut refurbishment (as above plus high-specification internal finishes, bespoke joinery, underfloor heating, smart home control, premium appliances and sanitary ware — client-supplied): 3-bedroom London townhouse (100-130m²): £200,000-£350,000. 4-5 bedroom detached or large semi-detached (150-200m²): £280,000-£500,000. Key cost drivers: the single largest variable in full house refurbishment cost (beyond the basic specification level) is the extent of structural works and the condition of the existing fabric. A Victorian terrace with a failed roof, lead pipework, original wiring, and evidence of settlement requires significantly more work than a 1990s property with PVC-u windows, copper pipework, and a 10-year-old boiler.

For a typical 3-bedroom London Victorian terrace (approximately 100m²) undergoing a full gut refurbishment — approximate contractor cost breakdown: Demolition and strip-out: £4,000-£8,000. Structural works (chimney breast removal or structural openings): £5,000-£15,000 (highly variable). Roofing (partial re-slate, gutters, downpipes): £4,000-£10,000. Full rewire (18th Edition, new consumer unit, all circuits): £7,000-£13,000. First-fix plumbing (new supply pipework, hot water cylinder or combi, manifold): £6,000-£12,000. New heating system (new boiler, all new radiators, flush and commission): £5,000-£10,000. First-fix carpentry (stud walls, window boards, door liners): £3,000-£6,000. Insulation (loft insulation, wall cavity fill where applicable): £1,500-£4,000. Plastering (all rooms, renovation plaster where damp treatment required): £8,000-£15,000. Kitchen installation (labour and fittings — client supplies units, appliances): £3,000-£6,000. Bathroom installations ×2 (labour, waterproofing, tiling labour — client supplies sanitary ware and tiles): £8,000-£16,000. Floor finishes (acoustic mat, engineered oak or LVT — client supplies floor): £3,000-£6,000. Second-fix electrical (sockets, switches, light fittings, consumer unit commission): £2,500-£5,000. Second-fix plumbing (sanitary ware, taps, shower connections — client supplies): £2,000-£4,000. Decoration (two coats throughout, joinery gloss): £6,000-£12,000. Contingency (10-15% for unforeseen works revealed during strip-out): £7,000-£15,000. Total construction cost for a 3-bedroom London terrace full gut refurbishment: approximately £85,000-£157,000 (before client-supplied materials). The contingency allocation is critical in a Victorian property — it is virtually certain that some unforeseen condition (rot in a structural timber, failed drain, asbestos in the floor screed, unforeseen settlement) will be discovered during strip-out, requiring additional cost.

Homeowners who successfully budget a full London house refurbishment typically follow the following approach: Step 1 — start with a pre-refurbishment survey: before budgeting, commission a RICS Level 3 Building Survey or, better, a structural engineer's condition report. This identifies the existing condition of the fabric and any structural or damp issues that will add cost to the refurbishment beyond the standard scope. The cost of unexpected structural defects discovered during strip-out is the most common cause of budget overrun in London Victorian house refurbishments. Step 2 — build the budget in trade sequence: allocate a budget for each trade in the sequence of the works (demolition, structural, roofing, M&E, carpentry, plaster, kitchen, bathrooms, flooring, decoration). Use the trade-by-trade cost guide above as a starting framework and adjust for the specific extent of works in each trade. Step 3 — separate contractor-supplied from client-supplied: agree with the contractor which materials the client supplies (kitchen, appliances, sanitary ware, tiles, floor finishes, light fittings) and which the contractor supplies (structural materials, mechanical and electrical materials, plaster, and all labour). Agree this before the contract is signed and ensure the contract is explicit. Step 4 — add professional fees and surveys: architect (if used — design and contract administration): £5,000-£15,000. Structural engineer: £800-£2,500. Building Control: £800-£2,500. Party wall surveyor (if applicable — structural alteration near the party wall): £1,500-£3,000. Step 5 — add a contingency: 10-15% minimum for a Victorian property gut refurbishment. The contingency is not optional — it is effectively a certainty of expenditure, just at an unknown time during the project. Homeowners who do not budget a contingency overspend the budget without exception. Step 6 — add VAT: contractor labour in a house refurbishment is subject to 20% VAT (unless the property has been unoccupied for 2+ years, in which case 5% applies). A budget of £130,000 plus VAT = £156,000 gross. Many homeowners budget net figures and are surprised by the VAT. Confirm the contractor's VAT status and rate before accepting their quote.