Disclaimer

Project Cost Lab is published by Rodway Labs for general information. Outputs are not quotes, tenders, valuations or building-regulation advice.

VAT treatment depends on the works and the supplier. Regional factors are blunt multipliers, not a price book for your postcode. Specification, access, occupation and listed-building sliders are illustrations. Optional extras are allowances, not measured items.

Ground conditions, asbestos, hidden rot, services diversions, Party Wall awards and planning outcomes sit outside the range unless you tick the matching extra — and even then the figure is an allowance.

Last updated 22 September 2026.