Stratford-upon-Avon, Warwickshire
Semi-detached rear extension in Stratford-upon-Avon
Single or two-storey extensions for semi-detached houses, with side access and one party wall. We design, get the approvals for and build rear extensions for semi-detached houses in Stratford-upon-Avon and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Stratford-upon-Avon (CV37) as part of our Warwickshire work. Where a Stratford-upon-Avon semi already has a small lean-to at the back, we usually replace it rather than extend it.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a semi-detached rear extension cost in Stratford-upon-Avon?
In Stratford-upon-Avon, our guide for a semi-detached rear extension is £1,900–£3,100 per square metre including VAT for a standard specification. 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 for a semi-detached rear extension in Stratford-upon-Avon?
The planning route for a semi-detached rear extension in Stratford-upon-Avon is set by England's householder rules and your council.
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.
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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Stratford-upon-Avon like to extend?
Red-brick terraces and 1930s semis make up much of Stratford-upon-Avon. Many already have a small kitchen lean-to at the back, which a new rear extension usually replaces rather than adds to.
How a semi-detached rear extension in Stratford-upon-Avon comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Semi-detached rear extensions near Stratford-upon-Avon
We also build rear extensions for semi-detached houses in nearby Warwick (8.2 miles) and Royal Leamington Spa (10.2 miles).
- Semi-detached rear extension in Warwick
- Semi-detached rear extension in Royal Leamington Spa
- Semi-detached rear extension in Kenilworth
- Semi-detached rear extension in Evesham
- Semi-detached rear extension in Redditch
Other work in Stratford-upon-Avon:
FAQ
Semi-detached rear extension questions in Stratford-upon-Avon
How much does a semi-detached rear extension cost in Stratford-upon-Avon?
As a guide, £1,900–£3,100 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £23,000–£37,000 at that rate. Your written price follows the survey.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Can I match pebbledash or render?
Yes. Many semis are refinished with new render across the whole back elevation so old and new match.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
What postcode areas do you cover around Stratford-upon-Avon?
Including CV37, and the surrounding Warwickshire area.
Is the site visit in Stratford-upon-Avon free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.