Estimate the build cost of a home extension or conversion. Useful for budgeting before commissioning architectural drawings or surveys.
m²
£
£
m
£/m
qty
£
£/m²
ESTIMATED TOTAL COST
£0
Rate applied: £0/m²
Likely range: £0 - £0
Cost breakdown
Indicative only. Based on representative £/m² rates by extension type, quality and region.
Actual costs depend heavily on specification, site conditions, and contractor.
Commission detailed quotes from at least three builders before committing.
VAT: extensions to existing dwellings are standard-rated at 20%. New self-build dwellings may be zero-rated.