Home extensions in Derby
More space without moving: we plan and build extensions across Derby, with one team for the drawings, the council and the build.
- Postcode districtsDE1, DE3, DE21, DE22, DE23, DE24
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Planning rules in Derby
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.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Covering Derby and nearby
Our survey diary covers Derby, including DE1, DE3, DE21, DE22, DE23, DE24. Neighbouring towns we cover include Belper (7 miles), Ilkeston (8 miles), Heanor (8 miles), Ripley (8 miles), Long Eaton (9 miles). Eastwood, in Nottinghamshire, is roughly 9 miles from Derby and also on our list.
Guide prices for Derby
We publish guide prices so you can budget before anyone visits. For Derby they are adjusted by ×0.95, the factor we use across East Midlands.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
What works best for Derby houses?
The East Midlands has plenty of inter-war and post-war semis and detached houses with room to extend, alongside Victorian terraces in the towns.
The types we would usually look at first for a home in Derby are side extensions, single-storey rear extensions and double-storey extensions, depending on the garden and how the house is laid out.
All extension types we build in Derby
- Extensions over a garage · from £22,500
- Orangery extensions · from £28,500
- Utility and boot room extensions · from £13,000
- Home office extensions · from £15,000
- Bungalow extensions · from £24,500
- Side extensions · from £20,500
- Conservatory replacement extensions · from £19,000
- Bedroom extensions · from £24,500
- Planning permission for extensions · from £300
- Building regulations for extensions · from £850
- Side return extensions · from £17,000
- Flat roof extensions · from £19,500
- Double-storey extensions · from £36,000
- Extension plans and drawings · from £1,100
- Timber frame extensions · from £19,500
- Glass box extensions · from £28,500
- Kitchen extensions · from £25,500
- Single-storey rear extensions · from £19,500
- Pitched roof extensions · from £21,000
- Annexe extensions · from £52,000
- Wraparound extensions · from £34,000
- Porch extensions · from £3,800
Free site visit
We visit your Derby home, measure up, talk through what you want and check the planning position.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Derby
How much does an extension cost in Derby?
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 cover all of Derby?
Yes, including the surrounding parts of Derbyshire. Site visits are free and there is no obligation.
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 I need planning permission for an extension in Derby?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Book a free site visit in Derby
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.