New York · Seneca County
ADU rules in Seneca County, town by town
New York has no statewide ADU law, so each town, village and city writes its own rules. We’ve checked 3 municipal codes in Seneca County so far. 0 of them describe a current way to approve an ADU or accessory apartment.
A village has its own zoning, separate from the town around it, and a ZIP code can cover both. Check which government is on your property tax bill. This table is a screening guide, not a permit answer: your zoning district and your lot decide. Codes change, so confirm with the code office before you spend money.
| Municipality | What the code says | Detached unit? | Size limit | Owner on site? | Checked |
|---|---|---|---|---|---|
| Village of Interlaken | Zoning not located online Not confirmed yet | Not addressed | Code doesn’t say | Code doesn’t say | October 13, 2026 |
| Town of Seneca Falls | No ADU rules yet Not confirmed yet | Not addressed | Code doesn’t say | Code doesn’t say | October 3, 2026 |
| Village of Waterloo | ADU defined, rules not found yet Not confirmed yet | Not addressed | Code doesn’t say | Code doesn’t say | October 3, 2026 |
Dates link to the code we read. “No ADU rules yet” means we found no ADU rules in the code. That isn’t permission, and some codes allow only one home or one main building on a lot: here’s what to do.
Room for what comes next
Planning an ADU in Seneca County?
Understand the rules, compare your options and make a list of questions for your municipality.