Extensions in Norfolk: design, planning and build
Looking to extend your home in Norfolk? Start here: extension types, guide prices for Norfolk, the planning rules that apply and how a project runs.
- Towns listed8
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Postcode districts45
Towns we cover in Norfolk
Towns we cover here include Norwich, Great Yarmouth, King's Lynn, Thetford.
Which extension suits a Norfolk home?
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
Depending on the plot, double-storey extensions and single-storey rear extensions are often the strongest options, with bungalow extensions worth considering where there is room.
Do extensions in Norfolk need planning permission?
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 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.
Norfolk extension prices at a glance
Every figure below is a guide for Norfolk, 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) |
|---|---|---|
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Double-storey extensions | 32 m² | £61,000 – £80,000 |
Choose an extension type
- Conservatory replacement extensions · from £21,000
- Wraparound extensions · from £38,000
- Utility and boot room extensions · from £14,500
- Timber frame extensions · from £22,000
- Extension plans and drawings · from £1,250
- Bedroom extensions · from £27,500
- Glass box extensions · from £31,500
- Extensions over a garage · from £25,000
- Porch extensions · from £4,200
- Flat roof extensions · from £22,000
- Side extensions · from £23,000
- Home office extensions · from £16,500
- Double-storey extensions · from £40,000
- Bungalow extensions · from £27,500
- Pitched roof extensions · from £23,500
- Side return extensions · from £19,000
- Building regulations for extensions · from £950
- Annexe extensions · from £58,000
- Orangery extensions · from £31,500
- Single-storey rear extensions · from £22,000
- Kitchen extensions · from £28,500
- Planning permission for extensions · from £350
Neighbouring areas
Questions about extensions in Norfolk
How much does an extension cost in Norfolk?
With our East of England factor (×1.06), a standard-spec 20 m² single-storey extension is a guide £43,000 to £55,500 including VAT. Prices for every type are linked on this page.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
How long does an extension take in Norfolk?
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.
Do you cover all of Norfolk?
Yes, across the whole of Norfolk. Site visits are free and there is no obligation.
Book a free site visit in Norfolk
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.