Why Hampstead homeowners choose loft conversions
Hampstead is one of London's most desirable villages — and one of its most expensive. Moving to a larger property on Church Row or Well Walk can cost £500,000+ more than converting the space you already own. A loft conversion in Hampstead adds a bedroom, bathroom, study or all three — without losing any garden space and often without needing planning permission.
In Hampstead and Hampstead Heath, a well-executed loft conversion typically adds £150,000–£300,000 to the property value. For a build cost of £45,000–£90,000, that's a return that outperforms almost any home improvement.
We've converted lofts in Victorian terraces near Hampstead Heath, Edwardian semis on Fitzjohn's Avenue, 1930s houses in South Hampstead, and mansion flats across the NW3 postcode. We know which streets have the head height, which roof types suit which conversion, and what Camden Council's planners will and won't approve — including properties in the Hampstead Conservation Area.
Our office is on Finchley Road, NW3 — we're genuinely local. When we say we know Hampstead, we mean we've built here for over 15 years.
Why loft conversions in Hampstead are different
Hampstead has unique characteristics that require specialist knowledge. Here's what sets loft conversions in this area apart.
Conservation Area Rules
Much of Hampstead falls within a conservation area. Mansard conversions need planning permission, and dormers may have restrictions on materials and visibility from the street. We handle all conservation officer consultations.
Victorian & Edwardian Roof Structures
Hampstead's housing stock is predominantly Victorian and Edwardian — cut-timber roofs with good ridge heights. Most terraces suit rear dormers under permitted development; period semis often work well with hip-to-gable conversions.
Party Wall in Terraces
Terrace houses near Hampstead Heath and the village share party walls on both sides. We serve party wall notices, appoint surveyors, and manage the process with your neighbours — it's included in our price.
Access & Scaffolding Challenges
Narrow lanes, rear gardens backing onto the Heath, and listed boundary walls mean scaffolding access needs careful planning. We survey access before quoting so there are no surprises.
Proximity to Hampstead Heath
Properties bordering Hampstead Heath may have additional planning sensitivities around views, tree protection orders, and ecological impact. We liaise directly with Camden's planning team.
High Property Values = High Return
With average property prices above £1.5M in Hampstead, a loft conversion adds proportionally more value here than almost anywhere else in London. A £70,000 investment can add £200,000+ in value.
"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 costs in Hampstead
Realistic price ranges specific to Hampstead properties. We provide a fixed price after surveying your loft — these are guides based on recent local projects.
| Loft Conversion Type | Typical Range (Hampstead) |
|---|---|
| Rear dormer (standard spec) | £48,000 – £65,000 |
| Rear dormer (premium spec) | £65,000 – £90,000 |
| Mansard conversion | £58,000 – £95,000 |
| Hip-to-gable + rear dormer | £55,000 – £80,000 |
| L-shaped dormer | £65,000 – £100,000 |
| Velux / rooflight only | £32,000 – £48,000 |
| En-suite bathroom | Included in price |
| Bespoke eaves storage | £1,500 – £4,000 |
All prices exclude VAT. Includes structural steelwork, staircase, fire compliance, electrics, plumbing, insulation, plastering, decoration and Building Control sign-off. Prices reflect Hampstead-area build costs as of 2026.
Loft conversion FAQ — Hampstead
It depends on the type. Rear dormers typically fall under Permitted Development. However, much of Hampstead is a conservation area where PD rights may be restricted — mansard conversions always need planning permission. We check your specific property before quoting and handle all applications.
A standard rear dormer takes 8–10 weeks on site. Mansard conversions take 10–14 weeks. Add 4–8 weeks for design, structural engineering and party wall agreements. Properties in conservation areas may need an additional 8 weeks for planning approval.
Party Wall Agreements are required for any structural work on shared walls. We serve all notices, appoint the surveyor, and manage neighbourly communications. Most neighbours are supportive once they see the professional approach.
In Hampstead, a loft conversion typically adds £150,000–£300,000 to the property value, depending on the property type, finish quality and whether you add an en-suite. Given build costs of £48,000–£100,000, the return on investment is exceptional.
Yes — we regularly work in the Hampstead Conservation Area. Mansard and dormer designs need to be sympathetic to the streetscape. We prepare heritage-sensitive designs and handle all Conservation Officer consultations.
Most Hampstead houses are excellent candidates. Victorian terraces near the Heath suit L-shaped or rear dormers. Edwardian semis on streets like Fitzjohn's Avenue work well with hip-to-gable conversions. We assess your specific roof during the free survey.
Book a free loft survey in Hampstead
We'll visit your Hampstead property, measure the loft, check head height and roof structure, assess conservation area and permitted development eligibility, and give you a realistic price — completely free, no obligation.
Unit 3, Palace Court, 250 Finchley Road, Hampstead, London NW3 6DN
Mon–Fri 9am–8pm · Saturday 9am–6pm · Sunday by appointment
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