builders
Priced scopes from homeowners who already know their budget
Modern GBQGrace Estimation MethodFor homeowners and developers
Know what your build should cost, before you talk to anyone
Describe the project once. Modern GBQ works out the quantities, prices every line from real supplier offers and trade rates, and shows you where each number came from. When you are ready, the same priced scope goes to builders.
Already have an account? Log in. Or read the guide for your role first — no account needed.
How it works
What you actually do
- 1
Describe the project
Record the site address, the buildings, their storeys and rooms, with whatever measurements you have. Anything you leave blank is simply not used.
- 2
Get a Ballpark figure
Sixty-four governed formulas turn that description into quantities, and every line is priced from the best source available. It costs nothing and takes minutes.
- 3
Choose your materials
Swap any item for an alternative from the catalogue. Each line shows what priced it — a supplier's published offer, a market price with its source, or an indicative rate.
- 4
Send it to builders
Invite verified builders to the approved scope. Their responses are compared blind — numbers before names — so price and programme decide, not familiarity.
Worth knowing first
The honest limits
Better to read these now than to discover them after signing up.
- Modern GBQ is not a builder and does not carry out work. An estimate is an estimate, not an offer.
- Selecting a builder records your intent. It is not a contract, and no payment passes through the platform.
- A Ballpark quote is for budgeting only and can never be sent to builders.
Not you?
Modern GBQ for other people
suppliers
Be the price behind every quote in your market
estimators, architects and project managers
Work on your client's project without rebuilding their numbers