Cost guide
How much does a wraparound extension cost?
Published UK total-cost ranges for a wraparound (L-shaped) extension.
Our own rates for a wraparound extension run £1,600-£3,500 per m² excluding VAT, depending on specification tier - use the cost calculator for an estimate based on your project's footprint. For general UK market context, 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 | ||
|---|---|---|
| Our rate (all specification tiers) - our confirmed rate, excl. VAT | £1,600-£3,500 | Per m² |
| MyBuilder estimate (market) | £60,000-£120,000 | Total project |
| Resi estimate (market) | £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 market estimates below come from different sources and shouldn't be read as one tight consensus range. Use the cost calculator for a personalised estimate based on our own current rates and your actual footprint.
These are general UK ranges. We build across the North West, including Darwen, Blackburn and the wider Lancashire and Greater Manchester area - site access, local trade rates and travel distance can move your actual price within (or occasionally outside) the range above.
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.
Start Your ProjectWant a price based on our own rates, not a market average? Take the cost calculator quiz →
Looking at how much does a wraparound extension cost?? See how we approach it →
Common questions
How much does a wraparound extension cost? FAQs
Is this a fixed quote for my wraparound extension?
No. The figures above are published UK industry ranges from MyBuilder and Resi, not a quote for your project. An accurate price depends on a site survey and your specific requirements - get in touch for an estimate based on your own project.
What actually drives the price up or down?
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.
What's a typical our rate (all specification tiers) in per m² terms?
Our rate (all specification tiers) typically runs £1,600-£3,500 (per m²), for a our confirmed rate, excl. VAT, based on the sources cited above.
Other cost guides
More published cost ranges
How much does a loft conversion cost?
Published industry ranges by conversion type, so you can budget sensibly before getting a quote.
How much does a house extension cost?
The published UK per-m² rate for a single-storey extension, and what actually moves it.
How much does a two storey extension cost?
Published per-m² rates by build quality, and what a typical two-storey extension runs in total.
Ready to make more of your home?
Tell us what you're thinking and let's see what's possible.
Start Your ProjectMore Space, Built to Last.