Off-Grid Living in Hunterdon County, New Jersey

I've been digging into what it actually takes to live off-grid in Hunterdon County, New Jersey, and the first thing I want to be honest about is this: Hunterdon County itself doesn't zone land or issue building permits. There's no countywide zoning code and no county building department. Under New Jersey's Municipal Land Use Law, that authority sits with each of the county's 26 townships, so whether you can park an RV, build a tiny house, or simply live on raw land depends on which township you're in, be it Raritan, Readington, Alexandria, or one of the others. I can't give you one answer for "Hunterdon County" on zoning because there isn't one.

Where the county does step in is environmental health. The Hunterdon County Department of Health is the certified local health agency under New Jersey's County Environmental Health Act, and it handles septic system permits and private well oversight countywide, applying state DEP technical standards. So septic systems are permitted, following the state's Standards for Individual Subsurface Sewage Disposal Systems, with the county reviewing applications and checklists. Wells are also permitted and county-administered, and Hunterdon is notably one of the New Jersey counties where the state's Private Well Testing Act requires an added uranium test, something to budget time and money for if you're drilling.

Building permits themselves come from your township's own construction department, operating under the statewide NJ Uniform Construction Code. The county's only real touchpoint here is a referral form making sure new construction doesn't encroach on an existing septic disposal area.

I couldn't confirm any county-level rule on greywater reuse or rainwater harvesting. No ordinance, health department page, or CEHA policy specifically addresses either one, so I'd treat both as an open question to ask your township and the county health department about directly, rather than assume you're in the clear.

On disconnecting from utilities entirely, there's no county ordinance forcing a hookup to public water or sewer, but practically speaking, getting a municipal Certificate of Occupancy typically requires an approved water supply and sewage system. In Hunterdon, that means a county-permitted well and septic system stand in for utility service, not that you can skip water and sewage infrastructure altogether. Composting toilets fall into the same "not specifically addressed" bucket as greywater, likely handled case by case by your local health department.

Bottom line: for anything land-use or building related, your township is the authority. For wells and septic, the county health department is your authority, and the state's rules sit underneath both. Confirm early with both levels before you buy land or start building.