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Free UK renovation cost calculator · Prices reviewed September 2026
What will your home project really cost?
Instant, independent prices for extensions, loft conversions, kitchens, bathrooms and nine more projects. Regional costs, VAT and fees included. No sign-up, and we never pass your details to builders.
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Estiquote UK Renovation Cost Index
What UK home projects cost in 2026
Typical mid-range prices outside London, including VAT, before fees. Every figure is dated, sourced and free to reuse.
See every cost guide| Project | Basis | Typical |
|---|---|---|
| House extension | Single-storey rear · 25 m² | £70,500 |
| Loft conversion | Rear dormer · 30 m² | £63,000 |
| New kitchen | Supply and fit · medium | £12,500 |
| Bathroom | Full bathroom refit, same layout | £7,500 |
| Garage conversion | Integral or attached single garage | £17,400 |
| Whole-house renovation | Full renovation (rewire, heating, kitchen, bathroom, plaster) · 90 m² | £108,000 |
| New build house | Built by a main contractor · 140 m² | £364,000 |
| House rewire | 3-bed house | £6,300 |
| New roof | Pitched roof, semi-detached house | £12,300 |
| Knock-through with steel beam | 3 to 4 m | £4,200 |
| New boiler | Combi boiler, like-for-like swap | £2,900 |
| Air source heat pump | 3-bed home (before £7,500 grant) | £13,500 |
| Replacement windows | 3-bed semi (about 10 windows) | £6,500 |
Why people use Estiquote
Numbers you can take to a builder
Sourced and dated
Every range is built from published 2026 UK cost data and our own council research, and we review it every quarter. See the method.
The whole budget
Building work, VAT, design and approval fees, and a contingency, so the budget you plan around covers the whole job, not just the builder’s part. It is a planning range, not a fixed price.
“I had got a quote from a conversion company which was far higher than what Estiquote broke down to me. I then shared the breakdown with another company who then matched the price.”
“It gave me a great indication of what my kitchen refurbishment was likely to cost and helped me understand the different areas of the budget before speaking to builders.”
“Really helped me work out costs and understand where my money would be spent during my extension and renovation works.”
Reviews from the UK App Store, where Estiquote is rated 5.0. Read them on the App Store.
Estiquote for iPhone
Go from a range to a plan
Save every estimate free. Project Pass breaks one project down section by section, checks each builder’s quote total against your range and gives you a PDF cost plan to send.
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- Price extensions, lofts, kitchens, bathrooms and more
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- Regional prices, VAT, fees and contingency
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Project Pass
£9.99One-off, no subscription
- For one project you choose, movable later
- Section-by-section schedule of works
- Labour, materials and preliminaries split
- Check each builder’s quote total against your range
- PDF cost plan to send builders
In-app purchase, UK price.
Trade
£19.99per month, cancel any time
- Full detail and quote checks on every project
- Your markup and client totals
- Your logo on client PDF cost plans
- Measured quote scope with your own rates
Auto-renewing subscription in the app.
New research
Your council can more than triple the cost of approving an extension
We compared building control fees at 91 councils in England and Wales. Full plans approval for the same 10 to 40 m² extension costs £587 in Bridgend and £1,876 in Camden, including VAT.
See what your council chargesEstiquote for iPhone
Plan it properly.
Free to start. Project Pass is a one-off £9.99; no subscription for homeowners.
iPhone, iOS 17 or later. Also runs on Apple silicon Macs.