Golders Green house extensions
We design and build house extensions for homes in Golders Green and the surrounding Greater London area, with guide prices adjusted for the region.
- Postcode districtsN2, N3, NW2, NW4, NW11
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Golders Green and surrounding towns
We cover Golders Green and the postcode districts N2, N3, NW2, NW4, NW11. Neighbouring towns we cover include Cricklewood (2 miles), Kilburn (2 miles), Finchley (2 miles), Muswell Hill (3 miles), Friern Barnet (3 miles). Borehamwood, in Hertfordshire, is roughly 6 miles from Golders Green and also on our list.
Golders Green extension prices at a glance
Prices on this page use our London factor of ×1.3, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
Which extension suits a Golders Green home?
London's housing is dominated by Victorian and Edwardian terraces, many with a rear outrigger and a side return, and 1930s semis in the outer boroughs. Conservation areas are common, so the planning check comes first.
Start by comparing wraparound extensions, side return extensions and glass box extensions: between them they cover most of the layouts we see requested for houses like these.
Planning and building control in Golders Green
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Every extension type in Golders Green
- Conservatory replacement extensions · from £26,000
- Porch extensions · from £5,200
- Extensions over a garage · from £31,000
- Extension plans and drawings · from £1,550
- Bedroom extensions · from £33,500
- Bungalow extensions · from £34,000
- Wraparound extensions · from £46,500
- Utility and boot room extensions · from £18,000
- Side return extensions · from £23,000
- Flat roof extensions · from £27,000
- Single-storey rear extensions · from £27,000
- Pitched roof extensions · from £28,500
- Building regulations for extensions · from £1,150
- Timber frame extensions · from £27,000
- Annexe extensions · from £71,500
- Double-storey extensions · from £49,000
- Side extensions · from £28,500
- Home office extensions · from £20,500
- Kitchen extensions · from £35,000
- Glass box extensions · from £39,000
- Orangery extensions · from £39,000
- Planning permission for extensions · from £450
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Golders Green
How much does an extension cost in Golders Green?
Using our London factor (×1.3), a standard-spec single-storey extension of 20 m² is a guide £53,000 to £68,000 including VAT, and a 32 m² two-storey extension £74,500 to £98,000. Your written price follows the survey.
How long does an extension take in Golders Green?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Do you cover all of Golders Green?
Yes, including the surrounding parts of Greater London. Site visits are free and there is no obligation.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Golders Green
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.