Swindon, Wiltshire
Wraparound extension in Swindon
Thinking about a wraparound extension in Swindon? An L-shaped extension that fills the side return and runs across the back. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Swindon sits in Wiltshire, with postcode districts including SN2, SN3, SN4 and SN5. In Swindon we usually draw the wraparound and a simpler rear-only option side by side, so the planning risk and cost difference are clear.
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 wraparound extension cost in Swindon?
For Swindon we work from the South West England rate: £2,290–£3,740 per square metre of new floor, including VAT, standard specification. 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 |
|---|---|
| L-shaped, about 22 m² of new floor | £50,500–£82,500 |
| L-shaped, about 30 m² of new floor | £68,500–£112,500 |
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 for a wraparound extension in Swindon?
The planning route for a wraparound extension in Swindon is set by England's householder rules and your council.
Side return infills and the side leg of a wraparound are treated as side extensions in England: single-storey, no more than 4 metres high and no wider than half the original house. They are not permitted development in conservation areas, National Parks or National Landscapes, and a joined wraparound often needs a planning application because the side and rear rules apply together.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
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 Swindon like to extend?
Stone-built and rendered houses are common around Swindon, so matching the walling is a design decision in its own right: natural stone, reconstituted stone or a render finish across old and new.
How a wraparound extension in Swindon comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Wraparound extensions near Swindon
Close by, we work in Royal Wootton Bassett, about 5.4 miles away, and Calne, about 12.7 miles away.
- Wraparound extension in Royal Wootton Bassett
- Wraparound extension in Calne
- Wraparound extension in Cirencester
- Wraparound extension in Wantage
- Wraparound extension in Carterton
Other work in Swindon:
FAQ
Wraparound extension questions in Swindon
What postcode areas do you cover around Swindon?
Including SN2, SN3, SN4, SN5, SN25 and SN26, and the surrounding Wiltshire area.
Can you match the brick or stone on my Swindon house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What roof suits a wraparound?
A flat roof with a lantern, a standing-seam pitched roof or a glazed roof over the side leg. The choice usually follows the first-floor windows above.
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.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.