Off-Grid Living in Montgomery County, New York

If you're looking at raw land or an existing off-grid setup in Montgomery County, New York, the first thing I want you to understand is that the county itself has almost no zoning authority. I confirmed this directly on the county's own FAQ page: "Zoning and Code Enforcement is done at the Town, Village or City level." That's not a technicality, it's the single most important fact for anyone researching off-grid rules here. Whatever town or village your parcel sits in is going to be the real decision-maker for zoning, dwelling standards, and building permits.

Zoning and dwellings. Because there's no countywide code, whether a tiny house, RV, or off-grid cabin can be a legal permanent residence depends entirely on the local municipal ordinance. I didn't find a Montgomery County - specific rule on RVs or tiny homes, so the state's general baseline applies as a floor (New York tends to treat tiny houses on wheels as travel trailers), but the town or village can add its own restrictions. You have to check with that specific municipality.

Building codes. Every town, village, and city in the county is required to follow the New York State Uniform Fire Prevention and Building Code, but it's each municipality's building department, not the county, that issues permits and enforces it.

Septic. This is the one area where the county genuinely runs the show. The Montgomery County Health Department reviews and issues onsite sewage system (septic) permit applications under its own sewer ordinance authority, and I found that homeowners can self-install only if they attend a class and pass a test through the department. This is a real, confirmed county-level requirement, not a local pass-through.

Greywater and rainwater. I couldn't find a Montgomery County - specific ordinance on either. Greywater reuse likely inherits the more restrictive New York State Department of Health baseline, while rainwater harvesting appears to be permitted with no extra county layer. Still, confirm locally since a town could theoretically layer on its own rule.

Wells. New York State requires well contractors to register with the DEC under state environmental law, and county health departments handle approvals for any deviations from state well-construction standards. I could not locate a Montgomery County - specific well permitting page, so treat well procedure as inheriting the state standard until you confirm otherwise with the county health department.

Utility disconnection. Same story as zoning, there's no countywide rule on living off-grid without utility hookups. It comes down to whichever town or village's building code and occupancy requirements apply to your parcel.

Bottom line: for septic, call the county. For everything else, your real answer lives with the town or village office.