Renovation Cost Calculator UK
Estimate based on property type, location and scope of works
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Step 1 of 4 — About you
Let's get started
Enter your email to receive your estimate. Your region helps us apply the right cost multiplier.
Please enter a valid email address — we'll send your estimate here.
Region *
Why it matters: Regional multipliers vary by up to 35%. London is ~25% above the national average; North England is ~10% below.
Please select your region.
Your property
Tell us about the property being renovated.
Property type *
Affects base cost. Detached homes have more external envelope. Flats are lower base cost but can have service charge complications for major works.
Please select a property type.
Estimated floor area — all floors *
Include all floors. Measure length × width of each floor and add together. Typical guide: 2-bed flat ≈ 60m², 3-bed semi ≈ 90m², 4-bed detached ≈ 130m².
Please select your approximate floor area.
Number of bedrooms *
Used to cross-check your floor area estimate and validate the cost calculation.
Please select number of bedrooms.
Property age *
Age = hidden cost risk. Pre-1920 adds 12% (solid walls, asbestos, lead pipes). 1920–1960 adds 8% (original wiring/plumbing likely). Post-1990 is generally predictable.
Please select property age.
Scope & specification
What level of renovation are you planning?
Renovation level *
Cosmetic = décor & finishes only. Full = all rooms stripped and refitted. Full + layout = walls moved, structural steel. If most of the project is an extension, use the Extension Calculator instead.
Please select a renovation level.
Specification level *
Basic = builder's standard. Mid-range = quality high street (Howdens, Porcelanosa entry). High spec = bespoke joinery, premium stone, UFH. Luxury = architect-specified, designer everything.
Please select a specification level.
Kitchen, bathrooms & extension
Final details to sharpen your estimate.
Replace kitchen? *
Includes units, worktops, appliances, splashback tiling and plumbing. If you're only replacing appliances or repainting, select No.
Please select an option.
Bathrooms to renovate *
Full refurbishment = all tiling, sanitaryware, plumbing and electrical. Includes en-suites. If you're only swapping a shower tray, select None.
Please select an option.
Extension planned? *
Select here only if an extension is secondary to your wider renovation. If extension is the main project, the Extension Calculator gives a more accurate result.
Please select an option.
🏗️Is most of your project an extension? The gives a more accurate result for extension-led projects.
Your estimate
Renovation cost estimate
Estimated total cost range
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Important: Indicative estimates based on UK market averages. Always obtain 3+ quotes before committing.
Intelligence Report — £19
Your estimate is a starting point.
Your report is what protects you.
Most homeowners uncover £5,000–£20,000 in surprises after committing to a renovation. Your report tells you exactly where those risks are — and gives you the data to negotiate around them.
What’s inside your report
Full cost breakdown by trade — labour & materials, line by line
Hidden risk flags for your property type, age & region
Contractor rate benchmarks for your area
Spec guidance: where to invest, where to cut
Questions to ask before you sign anything
Contingency guidance — the number most people get wrong
£Undetected asbestos or a rewire requirement could add £1,500–£9,000 — your report flags it before you sign anything.
£Over or under-specifying for your market typically costs £8,000–£20,000 more than it should — your report benchmarks the right level.
£Walking into contractor negotiations without data costs most buyers £3,000–£10,000 — your report gives you the numbers they use.
Built on RICS · BCIS · ONS data — the same sources professional surveyors use. 2025/26 figures.
View a sample report before you buy →
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