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Greater London

Rear extensions for terraced houses in Greater London

Rear and side return extensions for terraces, with access through the house and two neighbours. Rear extensions in Greater London: we cover 187 towns including Islington, Bexley and Barking, with design, approvals and the build under one contract.

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Backs of a row of Victorian terraced houses with single-storey rear extensions and roof lanterns

Terraced streets make up much of the housing in parts of Greater London, and most rear extensions here go in without side access. Greater London is mostly 1930s semis, short terraces and post-war houses, so full-width single-storey and two-storey rear extensions are realistic on many plots. Some later estates had permitted development rights removed by condition, so we check the planning history first.

How much does a terraced house rear extension cost in Greater London?

Guide prices for a terraced house rear extension in Greater London start from our London rate of £2,660–£4,290 per square metre, including VAT. London prices sit at the top of our range because of labour rates, access through the house, parking suspensions and skip licences.

Terraced house rear extension guide prices in Greater London
SizeGuide price inc VAT
3 m wide × 4.5 m deep (13.5 m²)£36,000–£58,000
3 m wide × 6 m deep (18 m²)£48,000–£77,000

We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.

Do you need planning permission in Greater London?

English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.

Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.

Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent.

Where in Greater London do we work?

FAQ

Questions people ask

Can you build without side access?

Yes. Materials come through the house in protected runs or over the roof by crane on tight sites.

Do both neighbours need party wall notices?

Usually yes in England and Wales, because the extension often sits on or near both boundaries.

How deep can I go on a terrace?

3 metres under permitted development in England, or up to 6 metres with prior approval outside designated land.

Do you cover all of Greater London?

We cover 187 towns and districts in Greater London, including Islington, Bexley and Barking.

Who builds the extension?

Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.

Next step

See what your rear extension would cost

Get a guide price online in a couple of minutes, or book a free site visit and we'll measure up and talk you through the planning route.

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