What is the average price guide for building in Birmingham?

When considering construction projects like house extensions, loft conversions, or garage conversions in Birmingham, it's essential to have a clear understanding of average costs in 2026.

### House Extensions The average cost for a house extension in Birmingham typically ranges from £1,200 to £2,500 per square meter. For a standard single-story extension, homeowners can expect to pay between £15,000 and £30,000, depending on the specifications and finishes.

### Loft Conversions Loft conversions usually cost around £1,500 to £2,500 per square meter. A typical dormer loft conversion can be priced between £30,000 and £50,000, again depending on design and materials used.

### Garage Conversions Garage conversions are often more affordable, averaging £10,000 to £20,000 for the project. This can vary based on whether new insulation or additional plumbing is required.

It's also crucial to ensure that your builders are certified; look for credentials such as NICEIC for electrical work and Gas Safe for any gas installations.

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