Extending your home in Braintree
We design and build house extensions for homes in Braintree and the surrounding Essex area, with guide prices adjusted for the region.
- Postcode districtsCM7, CM77
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Popular extension prices in Braintree
We publish guide prices so you can budget before anyone visits. For Braintree they are adjusted by ×1.06, the factor we use across East of England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Double-storey extensions | 32 m² | £61,000 – £80,000 |
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
Where we work near Braintree
We cover Braintree and the postcode districts CM7, CM77. We also work in nearby Witham (7 miles), Chelmsford (10 miles), Maldon (11 miles), Colchester (15 miles), Billericay (18 miles). For homes towards Suffolk, Sudbury is around 13 miles away.
What works best for Braintree houses?
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
Start by comparing wraparound extensions, bungalow extensions and double-storey extensions: between them they cover most of the layouts we see requested for houses like these.
Planning and building control in Braintree
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Choose an extension type
- Conservatory replacement extensions · from £21,000
- Utility and boot room extensions · from £14,500
- Wraparound extensions · from £38,000
- Side return extensions · from £19,000
- Bedroom extensions · from £27,500
- Bungalow extensions · from £27,500
- Glass box extensions · from £31,500
- Pitched roof extensions · from £23,500
- Building regulations for extensions · from £950
- Kitchen extensions · from £28,500
- Extension plans and drawings · from £1,250
- Home office extensions · from £16,500
- Annexe extensions · from £58,000
- Flat roof extensions · from £22,000
- Single-storey rear extensions · from £22,000
- Double-storey extensions · from £40,000
- Timber frame extensions · from £22,000
- Planning permission for extensions · from £350
- Porch extensions · from £4,200
- Orangery extensions · from £31,500
- Extensions over a garage · from £25,000
- Side extensions · from £23,000
Free site visit
We visit your Braintree home, measure up, talk through what you want and check the planning position.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Braintree
How much does an extension cost in Braintree?
Using our East of England factor (×1.06), a standard-spec single-storey extension of 20 m² is a guide £43,000 to £55,500 including VAT, and a 32 m² two-storey extension £61,000 to £80,000. Your written price follows the survey.
How long does an extension take in Braintree?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Braintree, and the guide-price tool gives a range for your own size and finish in about a minute.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Do you cover all of Braintree?
Yes, including the surrounding parts of Essex. Site visits are free and there is no obligation.
Book a free site visit in Braintree
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.