Get a personalised ballpark estimate for your London renovation in under 60 seconds. Select your project type, property details and specification level.
Select the renovation that best describes your project.
Tell us about your property and project size.
Choose the finish level that matches your vision.
Quality materials, clean contemporary finish
Designer fixtures, engineered oak, stone surfaces
Bespoke joinery, Carrara marble, smart home integration
Core build cost per square metre before VAT and project-specific fees, based on current London guide rates.
| Project Type | Standard | Premium | Luxury |
|---|---|---|---|
| Loft Conversion | £1,100 – £1,700 | £1,700 – £2,300 | £2,300 – £3,100 |
| House Extension | £1,500 – £2,100 | £2,100 – £2,700 | £2,700 – £3,300 |
| Kitchen Renovation | £400 – £750 | £750 – £1,200 | £1,200 – £2,000 |
| Bathroom Renovation | £700 – £1,100 | £1,100 – £1,700 | £1,700 – £2,600 |
| Basement Conversion | £1,600 – £2,400 | £3,000 – £4,300 | £4,300 – £6,000 |
| Full Refurbishment | Scope-based: cosmetic £650–£1,250/m²; back-to-brick £2,250–£3,250/m²; full flat £900–£1,700/m². No additional finish-tier uplift. | ||
Use the calculator result as early planning guidance rather than a fixed quotation. A realistic budget depends on the property, scope, specification, structural work, services upgrades, access, planning or building-control risk and the finish level you want to achieve. The same headline estimate can mean different decisions for a house refurbishment, flat refurbishment, house extension or basement conversion, particularly where hidden fabric, drainage, party-wall matters or staged access affect sequencing and risk.
Hampstead Renovations can review the result with you, identify likely cost drivers and turn it into a practical brief for design, procurement and delivery. This helps separate essential works from optional upgrades before the budget is treated as a commitment. That review can also highlight where a phased scope, different specification level or earlier planning advice could change priorities before commitments are made. If your project includes a kitchen renovation, bathroom renovation or planning-sensitive work, we can explain what should be checked before drawings, specifications and contractor pricing are developed. For a project-specific review, contact the team with the property type, intended scope and any constraints you already know.
Answers to the most common questions about renovation costs in London.