House extensions in Warwickshire
Looking to extend your home in Warwickshire? Start here: extension types, guide prices for Warwickshire, the planning rules that apply and how a project runs.
- Towns listed8
- Price regionWest Midlands (×0.97)
- Planning rulesEngland
- Postcode districts22
Towns we cover in Warwickshire
Towns we cover here include Nuneaton, Rugby, Leamington Spa, Warwick.
Do extensions in Warwickshire 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 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.
Which extension suits a Warwickshire home?
Across the West Midlands, brick-built semis with long gardens are common, so single-storey and two-storey rear extensions are popular choices.
Depending on the plot, kitchen extensions and extensions over a garage are often the strongest options, with single-storey rear extensions worth considering where there is room.
Warwickshire extension prices at a glance
Every figure below is a guide for Warwickshire, adjusted for West Midlands build costs (×0.97) 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 | £55,500 – £73,000 |
| Orangery extensions | 16 m² | £43,000 – £54,500 |
| Extensions over a garage | 12 m² | £24,000 – £31,500 |
| Conservatory replacement extensions | 14 m² | £29,000 – £37,500 |
| Kitchen extensions | 20 m² | £40,500 – £51,500 |
Extension types and starting prices
- Side return extensions · from £17,000
- Flat roof extensions · from £20,000
- Wraparound extensions · from £34,500
- Utility and boot room extensions · from £13,500
- Porch extensions · from £3,850
- Double-storey extensions · from £36,500
- Bedroom extensions · from £25,000
- Building regulations for extensions · from £850
- Single-storey rear extensions · from £20,000
- Planning permission for extensions · from £300
- Annexe extensions · from £53,000
- Glass box extensions · from £29,000
- Extensions over a garage · from £23,000
- Side extensions · from £21,000
- Home office extensions · from £15,500
- Extension plans and drawings · from £1,150
- Bungalow extensions · from £25,000
- Kitchen extensions · from £26,000
- Pitched roof extensions · from £21,500
- Orangery extensions · from £29,000
- Timber frame extensions · from £20,000
- Conservatory replacement extensions · from £19,000
Neighbouring areas
Questions about extensions in Warwickshire
How much does an extension cost in Warwickshire?
With our West Midlands factor (×0.97), a standard-spec 20 m² single-storey extension is a guide £39,500 to £50,500 including VAT. Prices for every type are linked on this page.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Warwickshire, and the guide-price tool gives a range for your own size and finish in about a minute.
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.
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.
Book a free site visit in Warwickshire
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.