House Extensions Shepherd's Bush
Single storey rear and double storey extensions in Shepherd's Bush, planning, structure and build under one contract.
- Rated 4.9 from 31 reviews on MyBuilder
- Single-storey rear extension from £40,000
- Free site survey, itemised quote
GS Renovation builds house extensions throughout Shepherd's Bush, adding space to the Victorian and Edwardian terraces of W12. Most of them are now divided into flats, so the work is usually on a whole house or on a ground-floor flat that has the garden. We handle everything from a side-return infill to a full double storey, managing foundations, steel, roofing and fit-out under one roof.
In Shepherd's Bush, a single-storey rear extension typically starts from £40,000, or £2,000 to £2,800 per m² (indicative London ranges, Architecture for London, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Shepherd's Bush: the structural engineer we appoint designs the structure, we build it, and building control signs it off.
Price guide
| Work | Indicative London range |
|---|---|
| Single-storey rear extension | from £40,000 |
| Rear extension, per m² | £2,000 to £2,800 |
| Side return, per m² | £2,400 to £3,200 |
| Wraparound, per m² | £2,400 to £3,200 |
| Double storey, per m² | £1,800 to £2,600 |
| Basement extension | see the basement page |
Indicative London ranges (Architecture for London, Resi, MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: Extension Costs & Planning.
Quick estimate for Shepherd's Bush
Shepherd's Bush range: choose above
Side return extensions in Shepherd's Bush
The side return, that narrow strip of outdoor space beside the rear closet wing, is the classic place to extend a Shepherd's Bush terrace. Filling it in widens a cramped galley kitchen into a proper open-plan kitchen-diner running the full breadth of the house. The work involves new foundations tight against the boundary, a steel frame to carry the existing wall, and a roof that often includes a glazed lantern to bring light deep into the plan.
Because you are building on or near the boundary, side-return work in W12 almost always engages the Party Wall Act: you serve the notice on the neighbours as building owner before we dig, and we give you the drawings and programme it needs and build to any award. A single-storey rear extension to a house can often be permitted development, and so can a side-return infill outside a conservation area, but a flat always needs planning permission, a side extension in a conservation area needs an application to Hammersmith and Fulham Council, and a terrace that has already been extended may need one too. We check your property's status before design, so there are no surprises.
Housing in Shepherd's Bush
Count the homes in Shepherd's Bush and you get about 13,640: 29% built since 1945, 17% between the wars and 53% before 1919, with flats at 87% and houses at 12%. Since most homes here are flats, a flat in Shepherd's Bush has no householder permitted development rights, so extending one needs planning permission and the freeholder's consent.
Building control stages for a Shepherd's Bush extension
A Shepherd's Bush extension is inspected in a set order, and planning the programme around it avoids trades standing idle. The council's listed inspection stages include commencement of work, foundation excavations, covering of foundations, completed foundations, damp proof course and membrane, and backfilling drain excavations. Each is a point where work is meant to be seen before it is covered, so the next trade waits on the visit. A trench is not concreted, a slab is not poured and a drain trench is not filled until that stage has been inspected.
The notice periods differ. Site inspections need 1 day's notice in most instances, while occupation, drainage systems and completion inspections require 5 days' notice. On a Shepherd's Bush garden reached only through the house, that matters: a drain trench left open for a week blocks the route for barrows and materials. We book the drainage visit when the trench is programmed rather than when it is dug, and put the foundation visit on the day the digging reaches depth, so concrete follows straight away.
Rear and double storey extensions in W12
Where a family needs more than a wider kitchen, a double storey rear extension adds a larger kitchen-diner below and a bedroom or en-suite above. On a Shepherd's Bush terrace this means matching the new brickwork and window proportions to the Victorian original, extending the closet wing, and building foundations deep enough for the added load. A double storey addition is more likely to need planning permission than a modest single storey rear, so we assess feasibility early.
Whichever route your extension takes, building regulations always apply, covering the structure, insulation, drainage and fire safety, with building control inspecting at each stage. Our team runs the whole programme, from groundworks and steel through to plastering, the new kitchen or bathroom and final decoration. We keep the rest of your W12 home liveable while we work, protecting floors and controlling dust, and we tie the drainage into the existing runs that serve these older terraces.
Kitchen extensions in Shepherd's Bush
87% of homes in Shepherd's Bush are flats, and a flat has no householder permitted development, so a ground-floor flat's kitchen extension needs planning permission from Hammersmith and Fulham Council and the freeholder's consent. With so few houses here, the realistic kitchen gain in most Shepherd's Bush homes is a better layout inside the flat rather than an extension. The fit-out is priced on its own page, kitchen renovation in Shepherd's Bush; the build figures are in the table above.
- Trial holes to set foundation depth near drains and trees
- Full fit-out, finishing and making good
- Building control inspections at foundation, damp course and steel stages
VOA Council Tax stock of properties, March 2025, for Shepherd's Bush North, Shepherd's Bush West, Shepherd's Bush South and White City. Counts rounded by the VOA.
Trusted House Extensions in Shepherd's Bush
Homeowners across Shepherd's Bush choose GS Renovation because we deliver the extension as a single, accountable project rather than a chain of separate trades. Our founder's 30+ years on the tools means we know how W12 terraces behave, what the council expects and how the party wall process runs alongside the build. From engineer's drawings to the last coat of paint, one team keeps the job on programme and on budget.
- Programme planned around party wall notice periods before excavation near a neighbour
- Permitted development checked before you pay for a planning application
- Aftercare and snagging support once the job is finished
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration…
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
Saaid is the best craftsman I have worked with. He knows what he is doing from the very beginning. He has a great knowledge of construction…
FAQ
Frequently Asked Questions about House Extensions Shepherd's Bush
What happens to the house extensions price if the scope changes in Shepherd's Bush?
Changing the scope of house extensions in Shepherd's Bush produces a written variation before anything else happens, priced against the original figure within £2,000 to £2,800 per m² for a rear extension (indicative). The commonest cause is upgrading a finish once the W12 space is open, which is simple to cost. A layout change is different, because the drainage run under the footprint decides the foundations. GS Renovation rebooks Hammersmith and Fulham Council building control inspections where needed.
Will my Shepherd's Bush extension need planning permission or is it permitted development?
Many single storey rear and side-return extensions in W12 fall within permitted development rights, but a larger or double storey scheme, a home in a conservation area, or a terrace that has already been extended may require a full planning application to Hammersmith and Fulham Council. We check the position for your address before we start design work.
Does a public sewer under the garden affect a Shepherd's Bush extension?
Yes. If a sewer serving other properties runs under the footprint, the water company has to approve building over or beside it before any foundation is dug. Part H also keeps falls and rodding access intact, so an inspection chamber may need relocating outside the new walls. A camera survey early in design reveals whether the pipe is shared or yours alone.
Can a Shepherd's Bush flat owner build a rear extension?
Possibly, but permitted development applies to houses, not flats. A flat extension needs planning permission from Hammersmith and Fulham Council, Building Regulations approval, and the freeholder's written consent. The lease plan shows whether the garden is yours. Start with the lease, since without consent the other approvals are pointless.
What notice goes to next door when digging foundations in Shepherd's Bush?
On a Shepherd's Bush terrace it is almost always the three-metre rule. Where your trenches come that close to next door and go deeper than their footings, they receive one month's written warning under the 1996 Act before digging. They may agree, or disagree and have surveyors draw up an award. Serve it as soon as the engineer has fixed the foundation depth.
How does building control sign off a Shepherd's Bush extension?
By visiting at each stage before it is covered: foundations, damp course and floor, drainage, the steel into the house, and insulation. Part L sets the insulation standard for walls, roof and floor. Hammersmith and Fulham Council issues the completion certificate after the final inspection. Book the visits into the programme early.
Could a Shepherd's Bush extension be liable for CIL?
Only if it is large or creates a new home. Developments that add 100m2 or more of new floorspace or create a new dwelling are liable for CIL in Hammersmith and Fulham. A single-storey rear extension is normally well below that. A wrap-around combined with a two-storey rear addition can approach the threshold, so the new gross internal area is measured before the drawings are frozen. Relief for extending your own home has to be claimed before work starts.
Do trees need notice before building an extension in a Shepherd's Bush conservation area?
Yes, where the trunk is 75mm or more across. Works to a tree in a conservation area with a trunk diameter of 75mm or more need six weeks' notice to the council. Cutting roots for a foundation or lifting a crown for scaffold can count. Serve the notice six weeks ahead of the dig, and let the engineer know about the tree so the foundation depth allows for it.
Does a Shepherd's Bush extension application need a flood risk assessment?
If the property is in a flood risk zone, yes. Two thirds of the borough is within one, and the assessment is submitted with the planning application. An extension built under permitted development has no application to attach it to. For a Shepherd's Bush rear extension the assessment can decide the finished floor level and the threshold at the garden doors, so get it before levels are fixed.
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