Many commercial water bills include a charge for draining rainwater from roofs, yards and car parks into the public sewer. The figure depends on supplier records of your site area and drainage routes. Where those records are wrong, Portrait measures the site, corrects the account and reclaims the overpayment.
For qualifying instructions the LiDAR scan is arranged at no upfront survey charge under signed terms. Our fee applies only if a qualifying reduction, refund or agreed saving is achieved.
The issue
Why surface water bills are so often wrong
Charges are typically set from historic site areas, mapped boundaries and broad assumptions about where water goes. Sites change. Surfaces are replaced, drainage is rerouted, and boundaries are redrawn, while the billing record stays put.
Chargeable area based on outdated or generalised measurements
Roofs and hardstanding that drain to soakaway, SUDS or a watercourse, not the sewer
Shared estates where apportionment between occupiers was never resolved
Charge bands that no longer match the measured extent of the premises
The method
Scan, analyse, evidence, reclaim
01
Scan
LiDAR capture of roofs, yards and surfaces produces a measured schedule of the site as it drains today.
02
Analyse
We set the measured areas against the water company’s records, tariff bands and drainage assumptions.
03
Evidence
Findings go into a supplier-ready pack: measured plans, drainage routes and the corrected charge basis.
04
Reclaim
We pursue the correction and any backdated refund with the supplier or wholesaler, and report the outcome.
Check my site
Ask for a drainage charge review
Send the site address and a recent water bill. We come back in writing with a view on whether the charge basis looks sound, and what a review would involve. No fee for the check.
Free initial review of bill and mapped site records
Clear yes or no on whether a case exists
No reduction, no fee route for qualifying sites
Two minutes with a water bill is enough to start
A first assessment is free and commits you to nothing. We reply in writing with a clear view of whether a case is worth pursuing.