What it covers
Paid subscription cost index (RICS-owned); free Rebuild Cost calculator partnership with ABI.
The single most-cited UK construction-cost benchmark. Used by every chartered QS.
What it costs
Index access £660+/yr; free consumer rebuild calculator at abi.bcis.co.uk.
What changed recently
Q2 2026 Tender Price Index released; small-residential category up 3.8% YoY.
Where it fits in a UK knockdown rebuild
Use BCIS (Building Cost Information Service) as one input among several when sizing a KDR. The calculator on this site cross-checks against BCIS, FMB, and HMRC simultaneously so no single reference drives the headline. For the live worked example, see the calculator; for every figure's primary source, see the sources ledger.
Primary source
Verified 2026-06-21 against the source URL above.