Mangotsfield, Bristol and South Gloucestershire
Single-storey rear extension in Mangotsfield
Thinking about a single-storey rear extension in Mangotsfield? Ground-floor space across the back of the house, usually for a kitchen, dining or family room. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Mangotsfield sits in Bristol and South Gloucestershire, with postcode districts including BS15, BS16 and BS36. A depth of 3 to 4 metres keeps many single-storey rear extensions in Mangotsfield within permitted development, subject to the house's planning history.
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 single-storey rear extension cost in Mangotsfield?
Guide prices for a single-storey rear extension in Mangotsfield start from our South West England rate of £1,980–£3,220 per square metre, including VAT. 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 m deep (12 m²) | £23,500–£38,500 |
| 4 m wide × 5 m deep (20 m²) | £39,500–£64,500 |
| 4 m wide × 6 m deep (24 m²) | £47,500–£77,500 |
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 single-storey rear extension in Mangotsfield?
Planning for a single-storey rear extension in Mangotsfield follows the English householder rules.
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.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Mangotsfield like to extend?
Stone-built and rendered houses are common around Mangotsfield, 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 single-storey rear extension in Mangotsfield 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.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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.
Single-storey rear extensions near Mangotsfield
Close by, we work in Kingswood, about 2.4 miles away, and Stoke Gifford, about 2.5 miles away.
- Single-storey rear extension in Kingswood
- Single-storey rear extension in Stoke Gifford
- Single-storey rear extension in Bristol
- Single-storey rear extension in Keynsham
- Single-storey rear extension in Yate
Other work in Mangotsfield:
FAQ
Single-storey rear extension questions in Mangotsfield
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.
What postcode areas do you cover around Mangotsfield?
Including BS15, BS16 and BS36, and the surrounding Bristol and South Gloucestershire area.
Does it add value to the house?
Nationwide's October 2025 house price research found that a 10% increase in floor area is linked to about 5% higher value on average. It is a guide, not a promise; local agents can tell you what extended homes on your street sell for.
Do I need planning permission for a rear extension in Mangotsfield?
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.
Is the site visit in Mangotsfield free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Mangotsfield house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.