Somerset
Pitched and lean-to roof rear extensions in Somerset
Lean-to, gable and hipped roofs that give a vaulted ceiling. We design and build rear extensions across Somerset, from Bath and Weston-super-Mare to Taunton, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.

Pitched roofs suit the cottages and slate-roofed houses in parts of Somerset. Somerset has Victorian terraces nearer the centre and post-war semis on the edges. Sloping gardens are frequent, which affects floor levels and steps down to the patio.
How much does a pitched-roof rear extension cost in Somerset?
Guide prices for a pitched-roof rear extension in Somerset start from our South West England rate of £2,080–£3,380 per square metre, including VAT. South West prices run slightly above our West Midlands baseline; natural stone to match the house is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £25,000–£40,500 |
| 4 m wide × 5 m deep (20 m²) | £41,500–£67,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission in Somerset?
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part 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 Somerset 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 Somerset?
We cover 19 towns and districts in Somerset, including Bath, Weston-super-Mare and Taunton.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.