Two-storey extensions in Birmingham
Planning a bigger home in Birmingham? Compare extension types and guide prices below, then book a free site visit.
Birmingham at a glance
- Postcode districts
- B1, B2, B3, B4, B5, B12 and nearby districts
- Area
- West Midlands, England
- Price region
- West Midlands
- Nearest towns
- Aston (1.5 miles), Hockley (1.5 miles), Smethwick (2.9 miles), Washwood Heath (3.4 miles)
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
We cover Birmingham (B1, B2, B3, B4, B5, B12 and nearby districts) and the places around it, including Aston (1.5 miles), Hockley (1.5 miles) and Smethwick.
Extensions available in Birmingham
Two-storey rear extensions
From £56,000 in Birmingham. Free visit to firm it up.
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Two-storey side extensions
From £86,000 in Birmingham. Free visit to firm it up.
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Two-storey wraparound extensions
Design, approvals and build for Birmingham homes. Guide from £120,500.
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Part single, part two-storey extensions
Our West Midlands guide starts at £72,000 for this type.
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Extensions over a garage
Guide from £31,500 in Birmingham, including VAT.
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First-floor extensions
Our West Midlands guide starts at £25,000 for this type.
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Two-storey extensions for semi-detached houses
From £56,000 in Birmingham. Free visit to firm it up.
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Two-storey extensions for detached houses
Birmingham guide price from £86,000, Standard spec.
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Kitchen extensions with bedrooms above
Guide from £56,000 (before kitchen units) in Birmingham, including VAT.
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Extra bedroom and en-suite extensions
Our West Midlands guide starts at £56,000 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Which type suits your house in Birmingham depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
Also available in the West Midlands
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Birmingham
Birmingham is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Birmingham
Do you cover Birmingham?
Yes. We cover Birmingham (B1, B2, B3, B4, B5, B12 and nearby districts) and the surrounding area, including Aston and Hockley. The first site visit is free.
What does a two-storey extension cost in Birmingham?
Using our West Midlands guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £56,000–£75,500 including VAT. An extension over a garage is about £31,500–£46,000.
Which other places near Birmingham do you cover?
Everywhere around it, including Aston (1.5 miles), Hockley (1.5 miles) and Smethwick (2.9 miles), and the rest of the West Midlands.