Ashtead, Surrey
Bungalow rear extension in Ashtead
Single-storey rear extensions that keep everything on one level. If you live in Ashtead and want to know what a bungalow rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Ashtead sits in Surrey, with postcode districts including KT18, KT21 and KT22. For Ashtead bungalows we design the roof first, because the low eaves decide the height of the new room.
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 bungalow rear extension cost in Ashtead?
In Ashtead, our guide for a bungalow rear extension is £2,070–£3,360 per square metre including VAT for a standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £25,000–£40,500 |
| 4 m wide × 6 m deep (24 m²) | £49,500–£80,500 |
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 bungalow rear extension in Ashtead?
Here is how the rules in England apply to a bungalow rear extension in Ashtead.
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.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
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 Ashtead like to extend?
Commuter semis and detached houses make up much of Ashtead, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in Ashtead 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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.
Bungalow rear extensions near Ashtead
Close by, we work in Leatherhead, about 1.7 miles away, and Epsom, about 2.0 miles away.
- Bungalow rear extension in Leatherhead
- Bungalow rear extension in Epsom
- Bungalow rear extension in Ewell
- Bungalow rear extension in Chessington
- Bungalow rear extension in Great Bookham
Other work in Ashtead:
FAQ
Bungalow rear extension questions in Ashtead
What postcode areas do you cover around Ashtead?
Including KT18, KT21 and KT22, and the surrounding Surrey area.
How much does a bungalow rear extension cost in Ashtead?
As a guide, £2,070–£3,360 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £25,000–£40,500 at that rate. Your written price follows the survey.
Is a bungalow extension cheaper?
The rates are similar per square metre; roof work can add a little.
Is the site visit in Ashtead free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do you handle building control in Ashtead?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How long does a rear extension take to build in Ashtead?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.