Honest pricing for Hampstead loft conversions
National comparison sites quote generic averages that don't reflect reality in Hampstead, NW3 or NW6. Build costs in North West London are higher than the UK average — but so is the value uplift. A loft conversion here is one of the best investments you can make.
The prices on this page come from our actual recent projects in Hampstead, Belsize Park, West Hampstead, Swiss Cottage and Kilburn. They include everything: structural steel, staircase, en-suite, insulation, electrics, plastering, decoration and Building Control.
What affects the price? Four main factors: (1) the conversion type — mansards cost more than dormers; (2) the spec level — standard or premium finishes; (3) access and scaffolding — some Hampstead streets are tighter; (4) planning — conservation areas add design costs. We give you a fixed, all-inclusive price after a free loft survey.
What's included in our prices
Every price below is all-inclusive. No hidden extras. Here's what you get as standard.
Structural Engineering
Chartered engineer calculations, steel beam design, drawings submitted to Building Control. All structural steelwork fabricated and installed.
Staircase
Purpose-built timber staircase to Building Regulations. Balustrade and handrail included. Positioned to minimise loss of space on the floor below.
En-Suite Bathroom
Fully plumbed and tiled en-suite with shower, WC, basin, heated towel rail and extractor fan. You choose the sanitaryware and tiles.
Full Insulation
High-performance Celotex or equivalent between and below rafters to current Part L standards. U-values certified.
Electrics & Lighting
NICEIC-certified full electrical installation — spotlights, sockets, USB points, media plates. Certificate at handover.
Decoration & Finish
Walls and ceilings emulsion painted (2 coats), woodwork satin-finished. Fire doors, smoke detectors and emergency lighting. Ready to move in.
"Ross and team completely transformed our loft into a stunning master suite with en-suite and walk-in wardrobe. The attention to detail was exceptional — from the bespoke eaves storage to the Juliet balcony. Finished on time and exactly on budget."Cirus RehmanHomeowner, Hampstead NW3
Loft conversion price guide — Hampstead, NW3 & NW6
Fixed prices from recent Hampstead-area projects. We provide a written quote after surveying your loft — no hidden extras.
| Conversion Type | 2026 Price Range |
|---|---|
| Rear dormer — standard spec | £42,000 – £65,000 |
| Rear dormer — premium spec (underfloor heating, bespoke joinery) | £65,000 – £90,000 |
| Mansard conversion — standard | £52,000 – £85,000 |
| Mansard conversion — premium | £85,000 – £120,000 |
| Hip-to-gable + rear dormer | £48,000 – £80,000 |
| L-shaped dormer — standard | £58,000 – £90,000 |
| L-shaped dormer — premium | £90,000 – £130,000 |
| Velux / rooflight only (no dormer) | £28,000 – £48,000 |
| En-suite bathroom | Included |
| Bespoke eaves storage | £1,500 – £4,000 |
| Juliet balcony | £800 – £2,000 |
| Walk-in wardrobe | £2,000 – £5,000 |
All prices exclude VAT. Prices are specific to Hampstead, NW3 and NW6 and reflect local build costs as of 2026. We provide a fixed, all-inclusive price after a free site survey.
Loft conversion cost FAQ
Labour rates in NW London are higher, many properties are in conservation areas requiring planning applications and heritage-sensitive designs, and access can be more challenging on Hampstead's narrow streets. However, the value uplift is also far higher — typically £150,000–£300,000.
Standard includes quality sanitaryware, standard tiling, carpet/laminate, and painted finishes. Premium adds underfloor heating, bespoke joinery, luxury tiles, engineered timber flooring, mood lighting, and high-end sanitaryware brands.
No. Our quote is a fixed, all-inclusive price that covers everything from scaffolding to Building Control sign-off. The only extras would be things you choose to add after signing — like upgrading tile selections or adding a Juliet balcony.
Prices shown exclude VAT. VAT at 20% applies to loft conversions. If the property has been empty for 2+ years, a reduced rate may apply. We clarify this in your written quote.
Book a free loft survey. We visit your property, measure the loft, check head height and structure, assess planning constraints, and then provide a fixed written quote within 5 working days. No obligation.
We offer staged payments linked to milestones — typically 4 or 5 stages. You only pay for completed work. No upfront deposits beyond a 10% booking deposit to secure your start date.
Book a free loft survey & quote
Book a free loft survey — we'll visit your property, measure everything, check planning constraints, and provide a fixed written price within 5 working days. No obligation, no pressure.
Unit 3, Palace Court, 250 Finchley Road, Hampstead, London NW3 6DN
Mon–Fri 9am–8pm · Saturday 9am–6pm · Sunday by appointment
Company Reg: 16838595 · £10M Insurance (Aviva) · FMB Member · TrustMark