Extensions in Belper: design, planning and build
Every type of house extension in Belper, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsDE56
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Planning and building control in Belper
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).
Which extension suits a Belper home?
Homes across the East Midlands often have usable side land or a driveway beside the house, which opens up side and wraparound options.
For many houses here, side extensions, double-storey extensions or single-storey rear extensions gives the most useful space for the budget.
Belper extension prices at a glance
Every figure below is a guide for Belper, adjusted for East Midlands build costs (×0.95) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
Extension types and starting prices
- Orangery extensions · from £28,500
- Extensions over a garage · from £22,500
- Home office extensions · from £15,000
- Timber frame extensions · from £19,500
- Porch extensions · from £3,800
- Bedroom extensions · from £24,500
- Side extensions · from £20,500
- Wraparound extensions · from £34,000
- Side return extensions · from £17,000
- Extension plans and drawings · from £1,100
- Kitchen extensions · from £25,500
- Glass box extensions · from £28,500
- Single-storey rear extensions · from £19,500
- Annexe extensions · from £52,000
- Utility and boot room extensions · from £13,000
- Building regulations for extensions · from £850
- Planning permission for extensions · from £300
- Pitched roof extensions · from £21,000
- Conservatory replacement extensions · from £19,000
- Double-storey extensions · from £36,000
- Bungalow extensions · from £24,500
- Flat roof extensions · from £19,500
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
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
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Belper
How much does an extension cost in Belper?
Using our East Midlands factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Belper, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Belper?
Yes, including the surrounding parts of Derbyshire. Site visits are free and there is no obligation.
Book a free site visit in Belper
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.