Eight cost-line reference pages. Each documents the working benchmark, the source of record and how the line lands in the residual stack. Stress these inputs first on the sensitivity heatmap.
BCIS £/sqm by region for houses and flats, from named council viability studies, with a build cost calculator.
Open →Planning cost overlay. When CIL applies, when s106 applies, BNG 10 percent uplift.
Open →Non-residential SDLT vs 5 percent residential surcharge. Six-or-more-dwellings rule.
Open →Architect, QS, planning consultant, legal, CDM. 10 to 15 percent of build cost.
Open →5, 7.5, 10 and 15 percent contingency by scheme risk.
Open →Agent fees 1 to 1.5 percent + VAT, legal per unit, 10-year warranty.
Open →S-curve drawdown, arrangement, monitoring, exit. IRR vs flat rate.
Open →17.5 percent PoGDV NPPF benchmark vs 20 percent PoC lender benchmark.
Open →