Renovating a whole house is a major undertaking. This guide gives you realistic cost estimates for every room and type of work — so you can plan and budget confidently.
Taking on a full house renovation is one of the most significant financial decisions a homeowner can make. Done well, it can transform the quality of your daily life and add substantial value to your property. Done without proper planning, it can lead to spiralling costs and endless delays. This room-by-room guide gives you realistic 2025 cost estimates for every element.
Full House Renovation: What's Involved?
A full renovation typically includes some or all of: new kitchen, bathroom(s), rewiring, replumbing, new boiler and heating system, new windows and doors, insulation, plastering, decorating, flooring, and potentially structural work. Costs vary enormously depending on the standard of specification and the condition of the property when you start.
Room-by-Room Cost Breakdown (2025)
Kitchen Renovation
| Specification | Cost Range |
|---|---|
| Budget kitchen (IKEA-level) | £5,000–£10,000 |
| Mid-range kitchen | £12,000–£25,000 |
| Premium/bespoke kitchen | £30,000–£80,000+ |
Bathroom Renovation
| Type | Cost Range |
|---|---|
| Budget bathroom refurb | £3,500–£6,000 |
| Mid-range full bathroom | £7,000–£12,000 |
| Luxury master en-suite | £12,000–£25,000 |
Full Rewire
A full house rewire is essential in properties over 25–30 years old or with original fuse boards. Expect to pay £3,000–£6,000 for a 3-bedroom house, £5,000–£9,000 for a 4–5 bedroom home.
Plumbing & Heating
- New combi boiler installation: £2,500–£4,500
- Full central heating system (new radiators & pipework): £5,000–£10,000
- Underfloor heating (wet system, per room): £800–£2,000
- Full replumb: £5,000–£15,000
Windows & External Doors
- uPVC double glazing (per window): £400–£700
- Aluminium windows (per window): £600–£1,200
- Full house windows (12–15 windows): £6,000–£18,000
- Composite front door: £1,500–£3,500
Roofing
- Full re-roof (3-bedroom semi): £8,000–£15,000
- Flat roof replacement: £2,000–£6,000 depending on area
- Chimney repointing and repair: £500–£2,500
Structural Work
- Remove a non-load-bearing wall: £1,000–£2,500
- Remove a load-bearing wall (with steel beam): £3,000–£8,000
- Underpinning (per linear metre): £1,500–£3,000
- Damp proof course installation: £2,000–£6,000
Decorating & Finishing
- Full house replaster: £8,000–£16,000
- Full house internal painting and decorating: £5,000–£12,000
- Hardwood flooring (per m²): £60–£150 supply and fit
- Engineered wood flooring (per m²): £40–£90 supply and fit
Total Full House Renovation Costs
| Property Size | Light Renovation | Full Renovation | Premium Renovation |
|---|---|---|---|
| 2-bed flat/house | £20,000–£40,000 | £40,000–£70,000 | £70,000–£120,000 |
| 3-bed semi | £30,000–£55,000 | £55,000–£100,000 | £100,000–£180,000 |
| 4-bed detached | £45,000–£80,000 | £80,000–£150,000 | £150,000–£300,000+ |
5 Ways to Control Your Renovation Budget
- Get a detailed schedule of works from your builder — not a single lump sum.
- Build in a 15–20% contingency — renovations always throw up surprises.
- Agree a clear payment schedule tied to milestones, not upfront lump sums.
- Make decisions before work starts — changing your mind mid-project costs significantly more.
- Obtain three competitive quotes and compare them on a like-for-like basis.
Planning a project in Hampshire or Surrey?
Fortis Construction & Maintenance offer free, no-obligation quotes. Our team has decades of experience with extensions, loft conversions and full renovations.
The Fortis Team
Fortis Construction & Maintenance
With decades of experience delivering extensions, loft conversions, and full renovations across Hampshire & Surrey, the Fortis team shares expert knowledge to help homeowners make informed decisions.
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Based in Hampshire & Surrey, we deliver high-quality extensions, renovations, and new builds with complete project management from start to finish.