Warwickshire
Rear extensions for semi-detached houses in Warwickshire
Single or two-storey extensions for semi-detached houses, with side access and one party wall. Rear extensions in Warwickshire: we cover 9 towns including Nuneaton, Rugby and Royal Leamington Spa, with design, approvals and the build under one contract.
Semi-detached houses are common across Warwickshire, and their side access makes rear extensions quicker to build. Red-brick terraces and 1930s semis make up much of Warwickshire. Many already have a small kitchen lean-to at the back, which a new rear extension usually replaces rather than adds to.
How much does a semi-detached rear extension cost in Warwickshire?
Guide prices for a semi-detached rear extension in Warwickshire start from our West Midlands rate of £1,900–£3,100 per square metre, including VAT. The West Midlands is the baseline for our guide prices.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £23,000–£37,000 |
| 4 m wide × 5 m deep (20 m²) | £38,000–£62,000 |
| 4 m wide × 6 m deep (24 m²) | £45,500–£74,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission in Warwickshire?
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.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent.
Where in Warwickshire do we work?
FAQ
Questions people ask
How far can I extend a semi without planning?
3 metres under permitted development in England, or up to 6 metres with prior approval, outside designated land.
Can I match pebbledash or render?
Yes. Many semis are refinished with new render across the whole back elevation so old and new match.
Single or two-storey on a semi?
Two-storey if you need bedrooms, single-storey if you need a bigger kitchen. Planning risk is lower for single-storey.
Do you cover all of Warwickshire?
We cover 9 towns and districts in Warwickshire, including Nuneaton, Rugby and Royal Leamington Spa.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.