West Midlands house extensions
More space without moving: we plan and build extensions across West Midlands, with one team for the drawings, the council and the build.
- Towns listed20
- Price regionWest Midlands (×0.97)
- Planning rulesEngland
- Postcode districts95
Towns we cover in West Midlands
Towns we cover here include Birmingham, Coventry, Wolverhampton, Dudley.
Choosing the right extension in West Midlands
The West Midlands has a large stock of 1930s and post-war semi-detached houses, which are well suited to rear, side and over-garage extensions, plus Victorian terraces in the older inner areas.
The types we would usually look at first for a home in West Midlands are kitchen extensions, single-storey rear extensions and extensions over a garage, depending on the garden and how the house is laid out.
Planning and building control in West Midlands
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.
West Midlands extension prices at a glance
We publish guide prices so you can budget before anyone visits. For West Midlands they are adjusted by ×0.97, the factor we use across West Midlands.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Wraparound extensions | 25 m² | £55,500 – £70,500 |
| Conservatory replacement extensions | 14 m² | £29,000 – £37,500 |
| Orangery extensions | 16 m² | £43,000 – £54,500 |
| Extensions over a garage | 12 m² | £24,000 – £31,500 |
| Double-storey extensions | 32 m² | £55,500 – £73,000 |
| Kitchen extensions | 20 m² | £40,500 – £51,500 |
| Side return extensions | 11 m² | £25,500 – £32,500 |
Extension types and starting prices
- Side return extensions · from £17,000
- Planning permission for extensions · from £300
- Flat roof extensions · from £20,000
- Orangery extensions · from £29,000
- Home office extensions · from £15,500
- Wraparound extensions · from £34,500
- Kitchen extensions · from £26,000
- Annexe extensions · from £53,000
- Building regulations for extensions · from £850
- Timber frame extensions · from £20,000
- Glass box extensions · from £29,000
- Side extensions · from £21,000
- Bungalow extensions · from £25,000
- Utility and boot room extensions · from £13,500
- Double-storey extensions · from £36,500
- Single-storey rear extensions · from £20,000
- Conservatory replacement extensions · from £19,000
- Porch extensions · from £3,850
- Bedroom extensions · from £25,000
- Extension plans and drawings · from £1,150
- Pitched roof extensions · from £21,500
- Extensions over a garage · from £23,000
Neighbouring areas
Questions about extensions in West Midlands
How much does an extension cost in West Midlands?
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.
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.
Do you cover all of West Midlands?
Yes, across the whole of West Midlands. Site visits are free and there is no obligation.
Do I need planning permission for an extension in West Midlands?
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.
Book a free site visit in West Midlands
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.