House Extensions in Wealdstone, HA3
Rear, side-return, wraparound and double-storey extensions for houses in Wealdstone, 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 Wealdstone.
An extension is the surest way to get the open-plan kitchen and dining room most families want, and the houses in Wealdstone 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 Harrow 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
- Wealdstone, HA3
- Council
- London Borough of Harrow
- Housing
- Victorian and Edwardian terraces around the High Street, 1930s semis on the roads towards Harrow Weald, post-war houses and new apartments near the station
- Transport
- Harrow & Wealdstone (Bakerloo, Overground, rail)
- 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
Wealdstone: the houses and the planning rules.
Wealdstone grew up around the railway works and the station, and its older streets are Victorian and Edwardian terraces of a type that suit side-return extensions and rear dormers. North of the High Street the housing shifts to 1930s semis with longer gardens, and around the station new apartment buildings have arrived in the last few years.
It is one of the more affordable parts of Harrow, which makes it a district where a well-planned extension or loft adds real value. We do rear and side-return extensions on the terraces, hip-to-gable lofts on the semis, and full refurbishments of houses bought to be improved.
There are no conservation areas in Wealdstone itself; the Harrow Weald and Harrow on the Hill conservation areas lie to the north and south.
London Borough of Harrow
Harrow decides applications. With no conservation area, most rear extensions and lofts fall within permitted development, confirmed by a lawful development certificate.
Terraces
Side-return and rear extensions on the terraces usually proceed under permitted development or prior approval; party wall notices are needed for the shared walls.
Flats
Converted houses and the newer apartment blocks need a licence to alter from the freeholder alongside building regulations.
Approvals for house extensions in Wealdstone.
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.
Harrow decides applications. With no conservation area, most rear extensions and lofts fall within permitted development, confirmed by a lawful development certificate.
What house extensions in Wealdstone 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 Wealdstone: your questions.
Do I need planning permission for an extension in Wealdstone?
Not always. Permitted development covers many single-storey rear extensions on houses, but the London Borough of Harrow 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 Wealdstone do you cover?
All of Wealdstone and HA3, including High Street, Masons Avenue, Canning Road, Palmerston Road, Grant Road, Headstone Drive, 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 Wealdstone.

House Refurbishment in Wealdstone
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Flat Refurbishment in Wealdstone
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Structural Alterations in Wealdstone
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Loft Conversions in Wealdstone
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Basement Conversions in Wealdstone
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Kitchen Renovation in Wealdstone
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Bathroom Renovation in Wealdstone
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Bespoke Joinery & Fitted Furniture in Wealdstone
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Architectural & Interior Design in Wealdstone
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Planning Permission & Building Regulations in Wealdstone
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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.
