Home extensions in Basingstoke
Looking to extend your home in Basingstoke? Start here: extension types, guide prices for Basingstoke, the planning rules that apply and how a project runs.
- Postcode districtsRG21, RG22, RG23, RG24, RG25
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Areas we cover around Basingstoke
Site visits are available across Basingstoke (RG21, RG22, RG23, RG24, RG25). The same team covers Alton (9 miles), Fleet (11 miles), Yateley (12 miles), Aldershot (14 miles), Bordon (14 miles), all within easy reach. Just over the Berkshire border, Thatcham is about 12 miles away.
Choosing the right extension in Basingstoke
Homes across the South East range from Victorian terraces in the older town centres to large detached houses on the edges, so the right extension type varies street by street.
Depending on the plot, orangery extensions and wraparound extensions are often the strongest options, with double-storey extensions worth considering where there is room.
Planning rules in Basingstoke
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).
Basingstoke extension prices at a glance
Every figure below is a guide for Basingstoke, adjusted for South East England build costs (×1.12) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
All extension types we build in Basingstoke
- Side return extensions · from £20,000
- Timber frame extensions · from £23,500
- Side extensions · from £24,500
- Extension plans and drawings · from £1,300
- Kitchen extensions · from £30,000
- Building regulations for extensions · from £1,000
- Conservatory replacement extensions · from £22,000
- Single-storey rear extensions · from £23,500
- Double-storey extensions · from £42,500
- Bungalow extensions · from £29,000
- Planning permission for extensions · from £350
- Wraparound extensions · from £40,000
- Pitched roof extensions · from £24,500
- Utility and boot room extensions · from £15,500
- Orangery extensions · from £33,500
- Extensions over a garage · from £26,500
- Glass box extensions · from £33,500
- Flat roof extensions · from £23,500
- Porch extensions · from £4,450
- Bedroom extensions · from £29,000
- Home office extensions · from £17,500
- Annexe extensions · from £61,500
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
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
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 Basingstoke
How much does an extension cost in Basingstoke?
Using our South East England factor (×1.12), a standard-spec single-storey extension of 20 m² is a guide £45,500 to £58,500 including VAT, and a 32 m² two-storey extension £64,500 to £84,500. Your written price follows the survey.
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 Basingstoke, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Basingstoke?
Yes, including the surrounding parts of Hampshire. Site visits are free and there is no obligation.
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 Basingstoke
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.