Trowbridge, Wiltshire
Side return extension in Trowbridge
Side return extension in Trowbridge: infilling the narrow passage beside a Victorian or Edwardian back addition. We measure the house, show you what the rules allow, price it in writing and build it.
Trowbridge is covered from our Wiltshire round, including BA14. Side returns suit the Victorian and Edwardian terraces found across parts of Wiltshire, where the kitchen sits in a narrow back addition.
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 side return extension cost in Trowbridge?
A side return extension in Trowbridge is priced at £2,390–£3,950 per square metre including VAT as a guide, before kitchen fit-out and fees. 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 |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £28,500–£47,500 |
| 2.5 m wide × 7 m deep (17.5 m²) | £42,000–£69,000 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a side return extension in Trowbridge?
Whether your side return extension in Trowbridge needs a planning application depends on its size, your house and any local restrictions.
In England the side part of a side return or wraparound must meet the side-extension rules (one storey, under 4 metres high, no more than half the width of the original house), and those rights do not apply on designated land. Because a wraparound combines a side and a rear extension, many need householder planning permission.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
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 Trowbridge like to extend?
Stone-built and rendered houses are common around Trowbridge, 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 side return extension in Trowbridge comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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.
Side return extensions near Trowbridge
We also build side return extensions in nearby Westbury (4.2 miles) and Melksham (4.8 miles).
- Side return extension in Westbury
- Side return extension in Melksham
- Side return extension in Neston
- Side return extension in Bath
- Side return extension in Frome
Other work in Trowbridge:
FAQ
Side return extension questions in Trowbridge
What postcode areas do you cover around Trowbridge?
Including BA14, and the surrounding Wiltshire area.
Is the site visit in Trowbridge free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Is a side return permitted development?
Sometimes, as a side extension within the width and height limits, but not in conservation areas, and many terraces are in one.
Do you handle building control in Trowbridge?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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.
How much does a side return extension cost in Trowbridge?
As a guide, £2,390–£3,950 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £28,500–£47,500 at that rate. Your written price follows the survey.