Stevenage, Hertfordshire
Bungalow rear extension in Stevenage
Thinking about a bungalow rear extension in Stevenage? Single-storey rear extensions that keep everything on one level. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Stevenage sits in Hertfordshire, with postcode districts including SG1 and SG2. For bungalows in Hertfordshire, 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 Stevenage?
In Stevenage, our guide for a bungalow rear extension is £1,960–£3,180 per square metre including VAT for a standard specification. 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 |
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 bungalow rear extension in Stevenage?
Planning for a bungalow rear extension in Stevenage follows the English householder rules.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is 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. 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 Stevenage like to extend?
Post-war semis and newer estates are typical of Stevenage, 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 Stevenage 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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 Stevenage
From Stevenage, the nearest places we also cover are Codicote (3.9 miles) and Hitchin (4.8 miles).
- Bungalow rear extension in Codicote
- Bungalow rear extension in Hitchin
- Bungalow rear extension in Letchworth Garden City
- Bungalow rear extension in Baldock
- Bungalow rear extension in Welwyn Garden City
Other work in Stevenage:
FAQ
Bungalow rear extension questions in Stevenage
Do you handle building control in Stevenage?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Is the site visit in Stevenage free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can I extend the loft as well?
Sometimes, but that is a different project; a rear extension keeps everything on one level.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
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.
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.