Birmingham, West Midlands
Two-storey rear extension in Birmingham
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Birmingham and the surrounding area, with one contract from the first survey to building control sign-off.
Birmingham sits in the West Midlands, with postcode districts including B6, B8, B19 and B23. Two-storey rear extensions suit semi-detached houses in Birmingham best, where the extra bedroom matters as much as the bigger kitchen.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Birmingham?
For Birmingham we work from the West Midlands rate: £1,800–£2,700 per square metre of new floor, including VAT, standard specification. The West Midlands is the baseline for our guide prices.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £54,000–£81,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £86,500–£129,500 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a two-storey rear extension in Birmingham?
Here is how the rules in England apply to a two-storey rear extension in Birmingham.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Birmingham like to extend?
Birmingham has a lot of post-war semis and estate houses with long gardens and side access, which makes rear extensions quicker to build.
How a two-storey rear extension in Birmingham comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Two-storey rear extensions near Birmingham
We also build two-storey rear extensions in nearby Aston (1.5 miles) and Hockley (1.5 miles).
- Two-storey rear extension in Aston
- Two-storey rear extension in Hockley
- Two-storey rear extension in Smethwick
- Two-storey rear extension in Washwood Heath
- Two-storey rear extension in Acocks Green
Other work in Birmingham:
FAQ
Two-storey rear extension questions in Birmingham
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Can it be built on a terraced house?
Sometimes, but the upper floor is harder to get through planning on a terrace because of the effect on neighbours. A single-storey extension with a loft conversion is often an easier route.
How much does a two-storey rear extension cost in Birmingham?
As a guide, £1,800–£2,700 per square metre including VAT for a standard specification. For example, 3 m × 5 m footprint, two floors (30 m²): about £54,000–£81,000 at that rate. Your written price follows the survey.
How long does a rear extension take to build in Birmingham?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Can you match the brick or stone on my Birmingham house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.