Shared laterals are discouraged except for extreme circumstances where it is technically or environmentally infeasible to install a lateral into a City main sewer. This is because of the difficulty of assigning and accepting responsibility when repairs are needed or emergencies occur. Cost is not considered a qualifying factor. In the event that the Department concurs that a shared lateral is the only feasible alternative, a maintenance agreement between the parties must be prepared and recorded.
Regarding another property using your lateral, you should first refer to the title report for the property to find if there is a recorded easement. If there is no recorded easement, the property owner using your lateral may have continued rights of use through the history of use. The City cannot assist in this determination, as it ultimately must be determined in court. Property owners are always encouraged to make all reasonable attempts to work with each other before seeking legal recourse.