Cost of a two storey extension in SE21

Two storey extension cost in SE21

Cost of a two storey extension in SE21

Estimates for two storey extension near SE21

Costs range from £87,976 (RCB Group Design & Build based in SE21) to £89,536 (Buci builders ltd based in SE27), but these are just estimates. The best way to compare costs is to get real quotes from real builders.

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"Two storey extension" - HERNE HILL, job posted 01/12/25

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Estimates for common extension builder jobs in SE21;

Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.