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. The VAT control on this site is a display choice, not a determination of the rate that applies to your job. 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.

The mid figure is a band for planning, not a contractor price. 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.

Rodway Labs is not a contractor, architect or quantity surveyor.

Not a quote. Figures on this page are illustrative UK cost bands for planning. They are not a tender, valuation or building-regulation ruling. Get written quotes for the property. Project Cost Lab (Rodway Labs) is not a contractor, architect or quantity surveyor. The mid figure is a band, not a price; the VAT toggle is a display choice, not a ruling.

Last updated 27 September 2026.