Shirley house extensions
We design and build house extensions for homes in Shirley and the surrounding West Midlands area, with guide prices adjusted for the region.
- Postcode districtsB27, B28, B90, B91
- Price regionWest Midlands (×0.97)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in Shirley
Prices on this page use our West Midlands factor of ×0.97, 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 | £25,500 – £32,500 |
| Extensions over a garage | 12 m² | £24,000 – £31,500 |
| Kitchen extensions | 20 m² | £40,500 – £51,500 |
| Orangery extensions | 16 m² | £43,000 – £54,500 |
| Wraparound extensions | 25 m² | £55,500 – £70,500 |
| Single-storey rear extensions | 20 m² | £39,500 – £50,500 |
| Conservatory replacement extensions | 14 m² | £29,000 – £37,500 |
What works best for Shirley houses?
Across the West Midlands, brick-built semis with long gardens are common, so single-storey and two-storey rear extensions are popular choices.
The types we would usually look at first for a home in Shirley are extensions over a garage, single-storey rear extensions and kitchen extensions, depending on the garden and how the house is laid out.
Where we work near Shirley
Our survey diary covers Shirley, including B27, B28, B90, B91. Nearby, we also take on projects in Solihull (2 miles), Birmingham (6 miles), Smethwick (8 miles), Halesowen (10 miles), West Bromwich (10 miles). Just over the Worcestershire border, Redditch is about 9 miles away.
Planning and building control in Shirley
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.
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).
Extension types and starting prices
- Kitchen extensions · from £26,000
- Bungalow extensions · from £25,000
- Building regulations for extensions · from £850
- Planning permission for extensions · from £300
- Extension plans and drawings · from £1,150
- Flat roof extensions · from £20,000
- Porch extensions · from £3,850
- Bedroom extensions · from £25,000
- Single-storey rear extensions · from £20,000
- Annexe extensions · from £53,000
- Utility and boot room extensions · from £13,500
- Conservatory replacement extensions · from £19,000
- Side extensions · from £21,000
- Pitched roof extensions · from £21,500
- Glass box extensions · from £29,000
- Side return extensions · from £17,000
- Wraparound extensions · from £34,500
- Timber frame extensions · from £20,000
- Double-storey extensions · from £36,500
- Orangery extensions · from £29,000
- Home office extensions · from £15,500
- Extensions over a garage · from £23,000
Free site visit
We visit your Shirley 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
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Shirley
How much does an extension cost in Shirley?
Using our West Midlands factor (×0.97), a standard-spec single-storey extension of 20 m² is a guide £39,500 to £50,500 including VAT, and a 32 m² two-storey extension £55,500 to £73,000. Your written price follows the survey.
How long does an extension take in Shirley?
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.
Do you cover all of Shirley?
Yes, including the surrounding parts of West Midlands. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Shirley, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Shirley
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.