House Extensions in Hampstead, NW3
Rear, side-return, wraparound and double-storey extensions for houses in Hampstead, designed, approved and built by one team.
Covered under one contract
- Architectural and structural design
- Planning or lawful development certificate
- Foundations, walls, roof and steels
- Glazing, rooflights and doors
- Kitchen designed and fitted
- Building control and party wall handled
House Extensions in Hampstead.
An extension is the surest way to get the open-plan kitchen and dining room most families want, and the houses in Hampstead generally lend themselves to it: a side return to fill, a rear garden to build into, or on larger plots room for a full-width or double-storey addition.
We design the extension around how you will use it, not around the maximum footprint the rules allow. That means thinking about light, the level change to the garden, where the kitchen sits, how the old and new parts of the house meet and what happens to the rooms you already have. The structural engineering, party wall matters and building control inspections are all handled by us.
Approvals are checked on the first visit. Many single-storey rear extensions fall within permitted development, but the London Borough of Camden applies tighter rules in conservation areas and to flats and listed buildings, so we confirm the route before any drawings are produced and then manage the application if one is needed.
- Area
- Hampstead, NW3
- Council
- London Borough of Camden
- Housing
- Georgian and Regency houses in the village, large Victorian and Edwardian houses on the Fitzjohns and Redington estates, Arts and Crafts houses, converted flats
- Transport
- Hampstead (Northern), Hampstead Heath (Overground)
- Rear or side return, on site
- 10 to 16 weeks
- Design and approvals
- 8 to 14 weeks before start
- Glazing lead time
- 6 to 10 weeks, ordered early
- Consent
- Permitted development or householder application
- Party wall
- Notices served by us
Hampstead: the houses and the planning rules.
Hampstead is a village on a hill with the Heath beside it: Georgian houses on Church Row and Flask Walk, red-brick Victorian mansions on Fitzjohns Avenue, Arts and Crafts houses on the Redington estate and a scatter of modernist infill. The housing is large, the plots are steep and irregular, and almost all of it is in a conservation area.
Projects in Hampstead tend to be substantial: whole-house refurbishments with basements, rear extensions that negotiate a sloping garden, and lofts within the tall Victorian roofs. Camden's conservation officers take the village character seriously, so we invest in the design and the heritage case before submitting anything.
The Hampstead Conservation Area covers the village and its surroundings, with Fitzjohns/Netherhall and Redington/Frognal alongside.
London Borough of Camden
Camden decides applications and applies Article 4 directions across much of Hampstead, removing permitted development for extensions, roof changes and front alterations.
Basements
Camden's basement policy requires a Basement Impact Assessment covering ground conditions, drainage and neighbouring structures, and limits depth and footprint.
Heath and trees
Tree preservation orders and Heath views are material considerations on many streets; we survey trees early.
Approvals for house extensions in Hampstead.
Many single-storey rear extensions are permitted development within the 3 or 4 metre limits, or 6 and 8 metres under prior approval. Conservation areas, flats, listed buildings and larger schemes need a householder application, and every extension needs building regulations approval.
Camden decides applications and applies Article 4 directions across much of Hampstead, removing permitted development for extensions, roof changes and front alterations.
What house extensions in Hampstead includes.
- Architectural and structural design
- Planning or lawful development certificate
- Foundations, walls, roof and steels
- Glazing, rooflights and doors
- Kitchen designed and fitted
- Building control and party wall handled
From site visit to handover.
- 01
Site visit & consultation
We visit, listen and measure. Brief, budget and constraints understood before any advice is given.
- 02
Design & itemised quote
Our architects and engineers draw the scheme, and from that we provide a transparent, itemised quotation for your approval.
- 03
Planning & approvals
Planning applications, building control and party wall matters handled for you.
- 04
Build, managed weekly
Our own trades, sequenced by a site manager. Progress reported every week.
- 05
Handover & aftercare
Joint snagging walk-through, documentation, and a guarantee on our workmanship.
House Extensions in Hampstead: your questions.
Do I need planning permission for an extension in Hampstead?
Not always. Permitted development covers many single-storey rear extensions on houses, but the London Borough of Camden removes those rights in some conservation areas, and flats and listed buildings always need an application. We confirm the route at the site visit.
How long does an extension take to build?
Ten to sixteen weeks on site for a single-storey extension once approvals are in place, plus the design and approval period beforehand. Glazing has the longest lead time, so we order it early.
Which parts of Hampstead do you cover?
All of Hampstead and NW3, including Church Row, Fitzjohns Avenue, Redington Road, Frognal, Well Walk, Flask Walk, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Other services in Hampstead.
House Refurbishment in Hampstead
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Flat Refurbishment in Hampstead
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Structural Alterations in Hampstead
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Loft Conversions in Hampstead
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Basement Conversions in Hampstead
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Kitchen Renovation in Hampstead
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Bathroom Renovation in Hampstead
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Bespoke Joinery & Fitted Furniture in Hampstead
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Architectural & Interior Design in Hampstead
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Planning Permission & Building Regulations in Hampstead
Read moreHouse Extensions across London.
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We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.