Kempston, Bedfordshire
Bungalow rear extension in Kempston
For homes in Kempston, a bungalow rear extension is often the simplest way to gain space without moving. Single-storey rear extensions that keep everything on one level. We take it from survey to completion certificate.
Kempston sits in Bedfordshire, with postcode districts including MK42. For bungalows in Bedfordshire, a rear extension is the usual way to add space without adding stairs.
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 Kempston?
A bungalow rear extension in Kempston is priced at £1,960–£3,180 per square metre including VAT as a guide, before kitchen fit-out and fees. East of England prices run slightly above our West Midlands baseline; clay soils near trees are the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £23,500–£38,000 |
| 4 m wide × 6 m deep (24 m²) | £47,000–£76,500 |
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 Kempston?
The planning route for a bungalow rear extension in Kempston is set by England's householder rules and your council.
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.
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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Kempston like to extend?
Post-war semis and newer estates are typical of Kempston, and many have room for a full-width extension. Shrinkable clay is common in the East of England, so foundations near trees and hedges are designed to NHBC-style depth guidance.
How a bungalow rear extension in Kempston comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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 Kempston
Neighbouring places we cover include Kempston Hardwick (1.8 miles) and Bedford (1.9 miles).
- Bungalow rear extension in Kempston Hardwick
- Bungalow rear extension in Bedford
- Bungalow rear extension in Ampthill
- Bungalow rear extension in Flitwick
- Bungalow rear extension in Sandy
Other work in Kempston:
FAQ
Bungalow rear extension questions in Kempston
Do you handle building control in Kempston?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
What postcode areas do you cover around Kempston?
Including MK42, and the surrounding Bedfordshire area.
Can I extend the loft as well?
Sometimes, but that is a different project; a rear extension keeps everything on one level.
Is the site visit in Kempston 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.
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.