homeowners and developers
Know what your build should cost, before you talk to anyone
Modern GBQGrace Estimation MethodFor builders
Priced scopes from homeowners who already know their budget
Every invitation arrives as a complete priced scope — quantities, materials, the drawings the homeowner chose to share — so you are quoting against something real instead of a phone call and a hunch.
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
Get verified
Register your business and our staff verify it. Until then you can set up your profile, but nothing you do reaches the marketplace.
- 2
Receive invitations
Your workspace lists what needs a response and by when. You see the project, the site locality and the approved scope line by line.
- 3
Respond on your terms
Accept, propose a revision, request a discussion, or decline. Six written fields cover programme, qualifications, exclusions and alternatives — so you are not reduced to a single number.
- 4
Win the work
Responses are compared blind. If you are selected you acknowledge, and the project opens to you.
Worth knowing first
The honest limits
Better to read these now than to discover them after signing up.
- Previewing an invitation, responding, revising and declining are all free. You pay to see the work, not to answer it.
- Declining after being selected costs half a rating point — the one rule that protects homeowners from a wasted round.
- Verification is a real check, not a formality, and it happens before you can trade.
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