Swindon, Wiltshire
Terraced house rear extension in Swindon
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in Swindon and want to know what a terraced house rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Swindon and its postcode districts SN2, SN3, SN4 and SN5 are part of our Wiltshire coverage. Terraced streets make up much of the housing in parts of Wiltshire, and most rear extensions here go in without side access.
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 terraced house rear extension cost in Swindon?
For Swindon we work from the South West England rate: £2,130–£3,430 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 |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £29,000–£46,500 |
| 3 m wide × 6 m deep (18 m²) | £38,500–£62,000 |
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 terraced house rear extension in Swindon?
Planning for a terraced house rear extension in Swindon follows the English householder rules.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is within 2 metres of a boundary.
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. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
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 terraced house rear extension in Swindon 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.
Terraced house rear extensions near Swindon
We also build rear extensions for terraced houses in nearby Royal Wootton Bassett (5.4 miles) and Calne (12.7 miles).
- Terraced house rear extension in Royal Wootton Bassett
- Terraced house rear extension in Calne
- Terraced house rear extension in Cirencester
- Terraced house rear extension in Wantage
- Terraced house rear extension in Carterton
Other work in Swindon:
FAQ
Terraced house rear extension questions in Swindon
Do I need planning permission for a rear extension in Swindon?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
What postcode areas do you cover around Swindon?
Including SN2, SN3, SN4, SN5, SN25 and SN26, and the surrounding Wiltshire area.
How do you keep the house clean?
Dust screens, floor protection and a single protected route through the house.
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.
How much does a terraced house rear extension cost in Swindon?
As a guide, £2,130–£3,430 per square metre including VAT for a standard specification. For example, 3 m wide × 4.5 m deep (13.5 m²): about £29,000–£46,500 at that rate. Your written price follows the survey.
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.