House Extensions in South Harrow, HA2
Rear, side-return, wraparound and double-storey extensions for houses in South Harrow, 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 South Harrow.
An extension is the surest way to get the open-plan kitchen and dining room most families want, and the houses in South Harrow 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
- South Harrow, HA2
- Council
- London Borough of Harrow
- Housing
- 1930s semis and terraces around the station and Northolt Road, Edwardian houses on Roxeth Hill, larger inter-war houses towards Rayners Lane
- Transport
- South Harrow (Piccadilly), Rayners Lane
- 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
South Harrow: the houses and the planning rules.
South Harrow sits below Harrow on the Hill, with the Piccadilly line station at its centre and streets of 1930s semis and terraces running out towards Rayners Lane and Northolt. The older houses climb Roxeth Hill towards the school, and the plots on the flatter streets are generous.
We have built extensions and lofts in Rayners Lane and the surrounding roads for years. The pattern is a rear extension across the full width of the house, a hip-to-gable loft, and often a refurbishment of the kitchen and bathrooms in the same programme.
The Roxeth Hill conservation area covers the slope up to Harrow on the Hill; most other streets are unrestricted.
London Borough of Harrow
Harrow decides applications. Outside the Roxeth Hill conservation area, most single-storey extensions and lofts are permitted development.
Roxeth Hill
Within the conservation area, front alterations and roof changes visible from the street need a full application.
Party walls
Semi-detached and terraced houses share walls with neighbours; party wall notices are served before structural work.
Approvals for house extensions in South Harrow.
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. Outside the Roxeth Hill conservation area, most single-storey extensions and lofts are permitted development.
What house extensions in South Harrow 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 South Harrow: your questions.
Do I need planning permission for an extension in South Harrow?
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 South Harrow do you cover?
All of South Harrow and HA2, including Northolt Road, Roxeth Hill, Shaftesbury Avenue, Eastcote Lane, Alexandra Avenue, Walton Road, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Our work near South Harrow.
Other services in South Harrow.
House Refurbishment in South Harrow
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Flat Refurbishment in South Harrow
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Structural Alterations in South Harrow
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Loft Conversions in South Harrow
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Basement Conversions in South Harrow
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Kitchen Renovation in South Harrow
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Bathroom Renovation in South Harrow
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Bespoke Joinery & Fitted Furniture in South Harrow
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Architectural & Interior Design in South Harrow
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Planning Permission & Building Regulations in South Harrow
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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.