Lakeshore has been ordered to pay the developer of St. Clair Shores $2.4 million.
A Superior Court Justice Duncan Grace ruled in favour of Mario Valente.
His lawyer argued the town didn't have the right to allow another developer to tap into a sewer - which belonged to Valente at the corner of Manning Road and E.C Row Expressway.
Claudio Martini says his client couldn't develop the rest of his 110 acre site.