BCIS Q2-2026 general building cost index by region. Each tile shows the low / mid / high GBP-per-sqm working band and an indicative GDV range. North West is the BCIS baseline (index 100); other regions adjust either side. Tap a region to load the workbench with its rates prefilled.
Six London boroughs where viability bites hardest. Each page sets out borough CIL, Mayoral CIL2 zone and a working GDV range.