Extensions & Conversions · Updated 2026

Home renovation cost estimator for the UK

Typical range£10,000£200,000· 3-bed house

A light home renovation in the UK typically costs £10,000–£25,000 (redecoration, new kitchen, bathroom refresh). A mid-range renovation runs £40,000–£80,000 (new kitchen, bathroom, electrics, heating, flooring throughout). A full renovation of a 3-bed house typically costs £100,000–£200,000 including structural work, extensions, loft conversions and high-end finishes.

Homeowners researching this typically also price up kitchen renovation cost in the uk, bathroom renovation cost in the uk and loft conversion cost in the uk. For wider context, browse our bathroom pricing, kitchen pricing and boiler & heating costs.

Cost table

Indicative price ranges (UK, GBP)
ItemTypical range (GBP)
Light refresh (decor, kitchen, bathroom)
£10,000–£25,000
Mid-range (kitchen, bath, electrics, heating, floors)
£40,000–£80,000
Full renovation (structural, extension, loft, high-end)
£100,000–£200,000
Kitchen renovation
£6,000–£25,000
Bathroom renovation
£4,500–£12,000
Electrical rewire
£4,000–£9,000
Boiler & heating upgrade
£3,000–£8,000
Loft conversion
£30,000–£75,000
Single-storey extension (20 m²)
£30,000–£52,000
Full house replastering
£6,000–£15,000
New windows (full house)
£5,000–£15,000

Labour costs

Labour typically accounts for 35–50% of a full renovation. The remainder is materials, professional fees, VAT and contingency.

Labour line items
ItemTypical range (GBP)
Builder / project manager (per week)
£1,500–£3,000
Electrician (full rewire)
£2,000–£5,000
Plumber / heating engineer
£2,000–£5,000
Plasterer (full house)
£3,000–£8,000
Kitchen fitter
£1,500–£4,000
Decorator (full house)
£2,000–£5,000

Materials costs

Materials span kitchens, bathrooms, electrics, heating, windows, flooring, tiles and decorative finishes.

Materials & fittings
ItemTypical range (GBP)
Kitchen (units, worktop, appliances)
£4,000–£15,000
Bathroom (suite, tiles, brassware)
£1,500–£6,000
Electrical (consumer unit, cables, fittings)
£1,500–£4,000
Boiler & heating system
£2,500–£6,000
Windows (full house)
£5,000–£12,000
Flooring (LVT, tile, carpet, per m²)
£25–£80/m²

Factors affecting cost in the UK

  • ·Property size — more rooms, more trades, longer timelines.
  • ·Property age — Victorian and Edwardian homes need more remedial work.
  • ·Location — London and the South East add 20–35% to most trades.
  • ·Scope — like-for-like replacement is cheaper than layout changes and extensions.
  • ·Quality tier — budget, mid-range, premium and bespoke all scale non-linearly.

Hidden & unexpected costs

  • ·Professional fees (architect, structural engineer, surveyor): 8–15% of build cost.
  • ·VAT at 20% on all work by VAT-registered contractors.
  • ·Contingency for unexpected issues: budget 10–15%.
  • ·Temporary accommodation during major works.
  • ·Storage for furniture and belongings.
  • ·Reconnection fees for services altered during renovation.

Ways to reduce cost

  • ·Set a clear scope and stick to it — changes mid-project are expensive.
  • ·Get a measured survey and detailed schedule of works before quoting.
  • ·Use a single main contractor rather than managing multiple trades yourself.
  • ·Schedule work in quieter months (January–March) for better availability.
  • ·Reuse existing layouts for kitchen and bathroom to avoid plumbing moves.

Frequently asked questions

How do I estimate my renovation budget?
Start with £1,000–£1,500 per m² for light refresh, £2,000–£3,000 per m² for mid-range, and £3,000–£5,000 per m² for premium. Add 10–15% contingency.
What order should I renovate a house?
Structural first, then building envelope (roof, windows), then services (electrics, plumbing, heating), then kitchens and bathrooms, then decoration last.
Should I move out during a full renovation?
For structural work, electrics and heating, yes. For cosmetic work, you can often stay with temporary kitchen and bathroom setups.
How much contingency should I budget?
10% for new builds; 15% for renovations of older properties. Victorian and rural homes often need 20%.
Do renovations add value?
A well-planned mid-range renovation typically returns 60–75% of cost at resale. Kitchens, bathrooms and extra bedrooms add the most value.