House extensions in Mansfield
Planning an extension in Mansfield? Compare extension types, see guide prices adjusted for Mansfield and book a free site visit.
- Postcode districtsNG17, NG18, NG19, NG20, NG21
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Choosing the right extension in Mansfield
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.
Depending on the plot, conservatory replacement extensions and double-storey extensions are often the strongest options, with side extensions worth considering where there is room.
Guide prices for Mansfield
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) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
Mansfield and surrounding towns
We cover Mansfield and the postcode districts NG17, NG18, NG19, NG20, NG21. The same team covers Mansfield Woodhouse (2 miles), Sutton-in-Ashfield (3 miles), Kirkby-in-Ashfield (3 miles), Hucknall (7 miles), Arnold (10 miles), all within easy reach. Just over the Derbyshire border, Alfreton is about 8 miles away.
Planning and building control in Mansfield
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 return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
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).
Choose an extension type
- Kitchen extensions · from £25,500
- Utility and boot room extensions · from £13,000
- Porch extensions · from £3,800
- Planning permission for extensions · from £300
- Orangery extensions · from £28,500
- Timber frame extensions · from £19,500
- Wraparound extensions · from £34,000
- Pitched roof extensions · from £21,000
- Double-storey extensions · from £36,000
- Building regulations for extensions · from £850
- Flat roof extensions · from £19,500
- Side extensions · from £20,500
- Annexe extensions · from £52,000
- Conservatory replacement extensions · from £19,000
- Extension plans and drawings · from £1,100
- Glass box extensions · from £28,500
- Bedroom extensions · from £24,500
- Home office extensions · from £15,000
- Side return extensions · from £17,000
- Extensions over a garage · from £22,500
- Bungalow extensions · from £24,500
- 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
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
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Mansfield
How much does an extension cost in Mansfield?
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.
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.
Do you cover all of Mansfield?
Yes, including the surrounding parts of Nottinghamshire. Site visits are free and there is no obligation.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Mansfield
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.