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Greater London

Pitched and lean-to roof rear extensions in Greater London

Lean-to, gable and hipped roofs that give a vaulted ceiling. Across Greater London we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Islington, Bexley and Barking.

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Rear extension interior with a vaulted lean-to roof, exposed white rafters and three roof windows

Pitched roofs suit the cottages and slate-roofed houses in parts of Greater London. 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 pitched-roof rear extension cost in Greater London?

In Greater London, our guide for a pitched-roof rear extension is £2,600–£4,220 per square metre including VAT for a standard specification. London prices sit at the top of our range because of labour rates, access through the house, parking suspensions and skip licences.

Pitched-roof rear extension guide prices in Greater London
SizeGuide price inc VAT
3 m wide × 4 m deep (12 m²)£31,000–£50,500
4 m wide × 5 m deep (20 m²)£52,000–£84,500

Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.

Do you need planning permission in Greater London?

Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is within 2 metres of a boundary.

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

Will a lean-to fit under my windows?

We check the sill heights at the survey; low windows usually mean a flat roof instead.

Are roof windows allowed?

Yes; they are the usual way to bring light into a pitched-roof extension.

Is a pitched roof more expensive?

Slightly, typically a few per cent more than a flat roof of the same area.

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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