Keynsham, Somerset
Terraced house rear extension in Keynsham
Rear and side return extensions for terraces, with access through the house and two neighbours. We design, get the approvals for and build rear extensions for terraced houses in Keynsham and the surrounding area, with one contract from the first survey to building control sign-off.
Keynsham sits in Somerset, with postcode districts including BS31. In Keynsham we plan the delivery route through the house and the skip licence before anything else.
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 Keynsham?
For Keynsham 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 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a terraced house rear extension in Keynsham?
Here is how the rules in England apply to a terraced house rear extension in Keynsham.
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.
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 Keynsham like to extend?
Stone-built and rendered houses are common around Keynsham, 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 Keynsham 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.
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.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Terraced house rear extensions near Keynsham
We also build rear extensions for terraced houses in nearby Kingswood (2.7 miles) and Mangotsfield (5.1 miles).
- Terraced house rear extension in Kingswood
- Terraced house rear extension in Mangotsfield
- Terraced house rear extension in Bristol
- Terraced house rear extension in Bishopsworth
- Terraced house rear extension in Bath
Other work in Keynsham:
FAQ
Terraced house rear extension questions in Keynsham
What postcode areas do you cover around Keynsham?
Including BS31, and the surrounding Somerset area.
Can you match the brick or stone on my Keynsham house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How do you keep the house clean?
Dust screens, floor protection and a single protected route through the house.
Is the site visit in Keynsham free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
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.
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.