Home extensions in Chesterfield
From a small utility to a two-storey addition, we take on house extensions throughout Chesterfield, starting with a free visit and a planning check.
- Postcode districtsS18, S40, S41, S42, S43, S44
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Chesterfield extension prices at a glance
Prices on this page use our East Midlands factor of ×0.95, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| 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 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
What works best for Chesterfield houses?
Homes across the East Midlands often have usable side land or a driveway beside the house, which opens up side and wraparound options.
The types we would usually look at first for a home in Chesterfield are single-storey rear extensions, double-storey extensions and side extensions, depending on the garden and how the house is laid out.
Planning rules in Chesterfield
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).
Where we work near Chesterfield
We cover Chesterfield and the postcode districts S18, S40, S41, S42, S43, S44. We also work in nearby Staveley (3 miles), Dronfield (4 miles), Alfreton (11 miles), Ripley (15 miles), Belper (16 miles). For homes towards South Yorkshire, Sheffield is around 9 miles away.
All extension types we build in Chesterfield
- Extensions over a garage · from £22,500
- Planning permission for extensions · from £300
- Utility and boot room extensions · from £13,000
- Bungalow extensions · from £24,500
- Kitchen extensions · from £25,500
- Conservatory replacement extensions · from £19,000
- Porch extensions · from £3,800
- Bedroom extensions · from £24,500
- Side extensions · from £20,500
- Pitched roof extensions · from £21,000
- Orangery extensions · from £28,500
- Building regulations for extensions · from £850
- Extension plans and drawings · from £1,100
- Annexe extensions · from £52,000
- Double-storey extensions · from £36,000
- Single-storey rear extensions · from £19,500
- Timber frame extensions · from £19,500
- Glass box extensions · from £28,500
- Flat roof extensions · from £19,500
- Side return extensions · from £17,000
- Home office extensions · from £15,000
- Wraparound extensions · from £34,000
Free site visit
We visit your Chesterfield home, measure up, talk through what you want and check the planning position.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
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
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Chesterfield
How much does an extension cost in Chesterfield?
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.
How long does an extension take in Chesterfield?
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.
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 Chesterfield
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.