Extensions cost in Birmingham
2026 prices for West Midlands · West Midlands
Extensions in Birmingham typically costs between £29,000 and £116,500, with most homeowners landing near £72,750. Local pricing sits about 3% below the UK average. A deep pool of trades and central location for merchant deliveries keeps pricing slightly below the UK average.
£29,000 – £116,500
UK average £2,200 per m² · Birmingham index 97
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Extensions prices in Birmingham by finish level
| FINISH LEVEL | BIRMINGHAM COST | WHAT'S INCLUDED |
|---|---|---|
| Budget | £29,000 – £43,500 | Entry-level materials, existing layout retained |
| Mid-range | £42,000 – £63,500 | Better fittings, some layout change |
| Premium | £56,500 – £85,000 | High-specification materials and full redesign |
£40,013
About 55% of a typical Birmingham job, at West Midlands day rates.
£32,737
Materials pricing is broadly national — this is where specification, not location, drives your total.
What affects extensions cost in Birmingham
Enormous range from Victorian villas in Moseley and Edgbaston to 1930s semis in Hall Green and post-war stock in Castle Vale. Trade supply is deep, so competitive quoting is realistic on most jobs.
- Drainage runs needing diversion
- Party wall agreements with neighbours
- Poor ground conditions requiring deeper foundations
Rules in Birmingham
Building control and planning applications for extensions work in Birmingham go through Birmingham City Council. Confirm before booking whether your property sits in a conservation area, is listed, or is covered by an Article 4 direction — each removes permitted development rights and changes the approval route.
Serving B1, B13, B14, B29, B31 and the surrounding West Midlands area.
Find vetted trades near BirminghamExtensions in Birmingham: common questions
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