Cost guide
How much does a wraparound extension cost?
Published UK total-cost ranges for a wraparound (L-shaped) extension.
A wraparound extension — combining a rear and side extension into one L-shaped space — has been quoted at £60,000–£120,000+ by MyBuilder and £125,000–£140,000 by Resi, reflecting the larger footprint of this configuration compared with a single rear or side extension.
Last updated 17 August 2026
| Range | ||
|---|---|---|
| MyBuilder estimate | £60,000–£120,000 | Total project |
| Resi estimate | £125,000–£140,000 | Total project |
Sources: MyBuilder (published December 2025), Resi (published February 2026, figures skew toward London/South East pricing)
Worth knowing
Neither HomeOwners Alliance nor Checkatrade publishes a dedicated wraparound-extension figure — the two ranges below come from different sources and shouldn't be read as one tight consensus range.
Key points
- It's typically the largest single-storey footprint of the extension types, so garden space and budget both matter more here than for a simple rear or side extension.
- The combined rear and side structure usually means more roofline and more structural openings than either configuration alone.
These are general published ranges, not a quote. Get an estimate based on your own project.
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