Topics
Town rules & home sales
Point-of-sale certificates, permits, illegal hookups, the county's role. 8 items, each with key facts and sources.
- Selling a house in Westchester: when a sewer lateral certificate is required
Rye and the Village of Mamaroneck require a video-checked lateral and a clean bill on illegal hookups before title transfer. Elsewhere, sellers need to ask.
- Village of Mamaroneck's sewer lateral certificate, step by step
The village's discharge compliance certificate hinges on a camera run, a sump pump list and a plumber's signature. Here is the sequence, from trigger to closing.
- Rye's sewer lateral law for home sales
Since 2022, Rye sellers have needed a plumber's sign-off and a camera video of the house sewer before closing. A certificate from the last five years can count.
- Westchester's county sewer districts and treatment plants, explained
Your town owns the street main, but the county owns the trunk lines and plants downstream. A plain map of who runs which layer, district by district.
- Inflow and infiltration: why rain ends up in the sanitary sewer
Westchester County caps how much rain and groundwater a town may send down sanitary pipes, and private laterals and hookups count toward the total.
- Roof leaders and sump pumps tied into the sanitary sewer are not allowed
State code keeps rainwater out of sewage-only pipes. Two Westchester places make a licensed plumber certify it before a house can be sold.
- Permits for sewer line work: what to ask your building department
Westchester towns do not publish one common permit rule for lateral repairs. The questions below cover the office, the licence, the inspection and the 811 call.
- New York's 2025 plumbing code: the sewer rules homeowners notice
The 2025 Plumbing Code of New York State took over on December 31, 2025. Most of the sewer rules an owner meets carried over unchanged from 2020.