Extending your home in Thetford
More space without moving: we plan and build extensions across Thetford, with one team for the drawings, the council and the build.
- Postcode districtsIP24
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
What works best for Thetford 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, double-storey extensions and single-storey rear extensions: between them they cover most of the layouts we see requested for houses like these.
Approvals for an extension in Thetford
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 single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
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).
Thetford and surrounding towns
Across IP24, we can visit, measure and advise. Neighbouring towns we cover include Wymondham (19 miles), Dereham (20 miles), Norwich (27 miles), King's Lynn (28 miles), North Walsham (39 miles). Just over the Suffolk border, Bury St Edmunds is about 12 miles away.
What extensions cost in Thetford
Every figure below is a guide for Thetford, adjusted for East of England build costs (×1.06) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Double-storey extensions | 32 m² | £61,000 – £80,000 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
Choose an extension type
- Flat roof extensions · from £22,000
- Utility and boot room extensions · from £14,500
- Porch extensions · from £4,200
- Bedroom extensions · from £27,500
- Conservatory replacement extensions · from £21,000
- Single-storey rear extensions · from £22,000
- Extensions over a garage · from £25,000
- Side return extensions · from £19,000
- Kitchen extensions · from £28,500
- Home office extensions · from £16,500
- Annexe extensions · from £58,000
- Wraparound extensions · from £38,000
- Building regulations for extensions · from £950
- Glass box extensions · from £31,500
- Planning permission for extensions · from £350
- Timber frame extensions · from £22,000
- Pitched roof extensions · from £23,500
- Double-storey extensions · from £40,000
- Side extensions · from £23,000
- Bungalow extensions · from £27,500
- Extension plans and drawings · from £1,250
- Orangery extensions · from £31,500
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
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 Thetford
How much does an extension cost in Thetford?
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.
Do you cover all of Thetford?
Yes, including the surrounding parts of Norfolk. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Thetford, 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.
How long does an extension take in Thetford?
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.
Book a free site visit in Thetford
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.