Birmingham, West Midlands
Glazed rear extension in Birmingham
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Birmingham and want to know what a glazed rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Birmingham sits in the West Midlands, with postcode districts including B6, B8, B19 and B23. Glass-led rear extensions in Birmingham are planned around which way the garden faces, because that decides the glass specification.
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 glazed rear extension cost in Birmingham?
For Birmingham we work from the West Midlands rate: £2,800–£4,800 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 |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £33,500–£57,500 |
| 4 m wide × 6 m deep (24 m²) | £67,000–£115,000 |
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 glazed rear extension in Birmingham?
The planning route for a glazed rear extension in Birmingham is set by England's householder rules and your council.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
New fabric must meet Approved Document L (2021 edition incorporating 2023 amendments): walls 0.18, roof 0.15 and floor 0.18 W/m²K, windows 1.4 W/m²K or Band B. Under the simple route, new windows, doors and rooflights should not exceed 25% of the extension floor area plus any openings removed; more glass is possible with a whole-house calculation.
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?
Red-brick terraces and 1930s semis make up much of Birmingham. Many already have a small kitchen lean-to at the back, which a new rear extension usually replaces rather than adds to.
How a glazed rear 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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Glazed rear extensions near Birmingham
From Birmingham, the nearest places we also cover are Aston (1.5 miles) and Hockley (1.5 miles).
- Glazed rear extension in Aston
- Glazed rear extension in Hockley
- Glazed rear extension in Smethwick
- Glazed rear extension in Washwood Heath
- Glazed rear extension in Acocks Green
Other work in Birmingham:
FAQ
Glazed rear extension questions in Birmingham
What postcode areas do you cover around Birmingham?
Including B6, B8, B19, B23, B28 and B73, and the surrounding West Midlands area.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Does glass need planning permission?
The same rules apply as any rear extension; glass does not change the depth or height limits.
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.
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.
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.