Dronfield house extensions
Planning an extension in Dronfield? Compare extension types, see guide prices adjusted for Dronfield and book a free site visit.
- Postcode districtsS18
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Dronfield 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 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.
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).
Guide prices for Dronfield
Every figure below is a guide for Dronfield, 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) |
|---|---|---|
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
Dronfield and surrounding towns
We cover Dronfield and the postcode districts S18. We also work in nearby Chesterfield (4 miles), Staveley (6 miles), Alfreton (15 miles), Buxton (18 miles), Ripley (19 miles). For homes towards South Yorkshire, Sheffield is around 6 miles away.
What works best for Dronfield 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 Dronfield are conservatory replacement extensions, double-storey extensions and single-storey rear extensions, depending on the garden and how the house is laid out.
Every extension type in Dronfield
- Bungalow extensions · from £24,500
- Utility and boot room extensions · from £13,000
- Double-storey extensions · from £36,000
- Timber frame extensions · from £19,500
- Planning permission for extensions · from £300
- Kitchen extensions · from £25,500
- Wraparound extensions · from £34,000
- Extension plans and drawings · from £1,100
- Building regulations for extensions · from £850
- Flat roof extensions · from £19,500
- Glass box extensions · from £28,500
- Porch extensions · from £3,800
- Annexe extensions · from £52,000
- Home office extensions · from £15,000
- Bedroom extensions · from £24,500
- Side return extensions · from £17,000
- Orangery extensions · from £28,500
- Pitched roof extensions · from £21,000
- Conservatory replacement extensions · from £19,000
- Extensions over a garage · from £22,500
- Side extensions · from £20,500
- Single-storey rear 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
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Dronfield
How much does an extension cost in Dronfield?
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 I need planning permission for an extension in Dronfield?
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.
Do you cover all of Dronfield?
Yes, including the surrounding parts of Derbyshire. 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 Dronfield, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Dronfield
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.