County Durham
Pitched and lean-to roof rear extensions in County Durham
Lean-to, gable and hipped roofs that give a vaulted ceiling. Across County Durham we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Darlington, Hartlepool and Stockton-on-Tees.
Pitched roofs suit the cottages and slate-roofed houses in parts of County Durham. Brick terraces, colliery houses and post-war semis make up much of County Durham. Former mining areas often need a coal mining risk check before foundations are designed.
How much does a pitched-roof rear extension cost in County Durham?
For County Durham we work from the North East England rate: £1,800–£2,920 per square metre of new floor, including VAT, standard specification. North East prices are among the lowest in our range; former mining ground is the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,500–£35,000 |
| 4 m wide × 5 m deep (20 m²) | £36,000–£58,500 |
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 County Durham?
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 County Durham 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 County Durham?
We cover 16 towns and districts in County Durham, including Darlington, Hartlepool and Stockton-on-Tees.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.