Groundworks & drainage estimating software
Measure excavations, slabs, drainage runs and paving, and price from a ready-made groundworks rate library — then run CIS-ready progress billing.
No credit card required · Your groundworks & drainage rate library is loaded for you
Fast area & run takeoff
Trace excavations, slabs and drainage runs in the browser with AI scale detection.
AI first pass
Detect the scale and pull schedule quantities in one click before you refine.
Groundworks rate library
Excavation, concrete, drainage, chambers and block paving rates ready to edit.
CIS & reverse charge
Applications for Payment with CIS and VAT reverse charge handled automatically.
From drawing → priced estimatePoint AI at your groundworks & drainage drawing
Upload a PDF or scanned drawing (or snap a photo on site). TradeOff detects the scale, reads the schedules and counts the symbols — then prices it from your rate library. Review every number and you're ready to bill.
Scale detected automatically
Quantities read from schedules & legends
Priced from your own rates, adjusted to your region
Built for UK subcontractors
Takeoff, estimate, bill and get paid in one browser-based tool — with CIS, VAT reverse charge and Xero handled for you.
Price your next groundworks & drainage job in minutes
Start free — your groundworks & drainage rate library is ready the moment you sign up.
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Install Trade Off
Add it to your home screen to open jobs fast — even with patchy signal.