Thornbury, Bristol and South Gloucestershire
Terraced house rear extension in Thornbury
We plan and build rear extensions for terraced houses for homeowners in Thornbury. Rear and side return extensions for terraces, with access through the house and two neighbours. Start with a free site visit, then a written price once the design is agreed.
We cover Thornbury (BS35) as part of our Bristol and South Gloucestershire work. Terraced streets make up much of the housing in parts of Bristol and South Gloucestershire, 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 Thornbury?
In Thornbury, our guide for a terraced house rear extension is £2,130–£3,430 per square metre including VAT for a 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 Thornbury?
Whether your terraced house rear extension in Thornbury needs a planning application depends on its size, your house and any local restrictions.
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 Thornbury like to extend?
Thornbury has Victorian terraces nearer the centre and post-war semis on the edges. Sloping gardens are frequent, which affects floor levels and steps down to the patio.
How a terraced house rear extension in Thornbury 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.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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.
Terraced house rear extensions near Thornbury
We also build rear extensions for terraced houses in nearby Stoke Gifford (6.4 miles) and Yate (6.4 miles).
- Terraced house rear extension in Stoke Gifford
- Terraced house rear extension in Yate
- Terraced house rear extension in Chepstow
- Terraced house rear extension in Mangotsfield
- Terraced house rear extension in Dursley
Other work in Thornbury:
FAQ
Terraced house rear extension questions in Thornbury
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Is the site visit in Thornbury free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Will my terrace be in a conservation area?
Many Victorian terraces are. Your council's map shows it; we check at the survey.
What postcode areas do you cover around Thornbury?
Including BS35, and the surrounding Bristol and South Gloucestershire area.
How long does a rear extension take to build in Thornbury?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Do you handle building control in Thornbury?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.