Birmingham, West Midlands
Side return extension in Birmingham
For homes in Birmingham, a side return extension is often the simplest way to gain space without moving. Infilling the narrow passage beside a Victorian or Edwardian back addition. We take it from survey to completion certificate.
Birmingham sits in the West Midlands, with postcode districts including B6, B8, B19 and B23. Side returns suit the Victorian and Edwardian terraces found across parts of the West Midlands, where the kitchen sits in a narrow back addition.
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 side return extension cost in Birmingham?
For Birmingham we work from the West Midlands rate: £2,300–£3,800 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 |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £27,500–£45,500 |
| 2.5 m wide × 7 m deep (17.5 m²) | £40,500–£66,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a side return extension in Birmingham?
Planning for a side return extension in Birmingham follows the English householder rules.
Side return infills and the side leg of a wraparound are treated as side extensions in England: single-storey, no more than 4 metres high and no wider than half the original house. They are not permitted development in conservation areas, National Parks or National Landscapes, and a joined wraparound often needs a planning application because the side and rear rules apply together.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
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 side return extension in Birmingham comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Side return extensions near Birmingham
From Birmingham, the nearest places we also cover are Aston (1.5 miles) and Hockley (1.5 miles).
- Side return extension in Aston
- Side return extension in Hockley
- Side return extension in Smethwick
- Side return extension in Washwood Heath
- Side return extension in Acocks Green
Other work in Birmingham:
FAQ
Side return 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.
How much does a side return extension cost in Birmingham?
As a guide, £2,300–£3,800 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £27,500–£45,500 at that rate. Your written price follows the survey.
Where does the drainage go?
Side passages often carry the soil and rainwater pipes. We survey them first and reroute them under the new floor where needed.
Do you handle building control in Birmingham?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
Do I need planning permission for a rear extension in Birmingham?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.