Hampshire
Pitched and lean-to roof rear extensions in Hampshire
Lean-to, gable and hipped roofs that give a vaulted ceiling. We design and build rear extensions across Hampshire, from Southampton and Portsmouth to Basingstoke, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.

Pitched roofs suit the cottages and slate-roofed houses in parts of Hampshire. Hampshire has a mix of Victorian terraces near the centre and larger Edwardian and inter-war houses further out. Clay soils across much of the South East mean deeper foundations near trees, which we plan for at the survey.
How much does a pitched-roof rear extension cost in Hampshire?
Guide prices for a pitched-roof rear extension in Hampshire start from our South East England rate of £2,240–£3,640 per square metre, including VAT. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £27,000–£43,500 |
| 4 m wide × 5 m deep (20 m²) | £45,000–£73,000 |
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 Hampshire?
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 Hampshire 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 Hampshire?
We cover 34 towns and districts in Hampshire, including Southampton, Portsmouth and Basingstoke.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.