Real construction costs for your property
Construction costs in the United Kingdom are not a secret — but they are systematically misrepresented.
Published industry indices average across property types, regions, and specifications in ways that make them almost useless for any individual project.
Online renovation calculators use those same indices, wrapped in a user interface that implies precision they cannot deliver.
Our data is different.
£135m of completed project invoices & live market data
Our cost database is built from the final accounts of completed residential projects. What was actually invoiced, actually paid, actually delivered.
Rear extensions, loft conversions, kitchen extensions, full renovations, and new builds across the UK; London, Bristol, Glasgow, Birmingham, Guildford, Manchester, Edinburgh and the wider UK.
Labour and materials priced from site data
The 70% labour component is where most cost tools fail.
We price labour from real site data, not desk estimates; because a plumber in Chiswick charges differently to a plumber in Cheltenham.
We constantly update and increase our cost data to ensure our market intelligence is always current
Cost per square metre for your postcode
When we quote a cost per m² for a rear extension in your area, it is derived from extensions that were actually built in that postcode.
Not extrapolated from a national averages.
Our Data is live and updated weekly with both materials and labour costs
Four tiers from £199 to £975
From a budget sense-check to a full tender-ready cost intelligence report.
Each tier gives you more precision as your project develops.
Extension costs, renovation budgets, and hidden building costs — quantified.
Before you commit.
Before you have plans.
Before spending anything on a project