Estimating Calculators

FAQs

Are these calculators tender ready?

They provide planning grade benchmarks for budgeting and scoping. Planning a whole house? Start with the Building Cost Calculator, then use the Self Build Cost Breakdown UK checklist to add fees, utilities, external works, risk and VAT treatment that may sit outside an individual calculator result. For tenders, use a QS prepared estimate with a BoQ plus allowances for preliminaries, overheads and profit, and risk.

Do results include VAT?

Each tool states whether figures include or exclude VAT. Where not stated, assume figures exclude VAT.

What region and base date do you use?

Great Britain. Base date shown on calculator. Units: m², l/m, m³, mm, GBP. Inputs are reviewed periodically; see each tool’s note for updates.

What if my scope is complex or unusual?

Upload your drawings and brief and we will prepare a tailored estimate with clarifications and assumptions. Start an order or upload plans. Self-builders can also review the required inputs and professional outputs on Estimating for Self-Builders.