Off-Grid Living in Mifflin County, Pennsylvania

I've been digging into Mifflin County, Pennsylvania for folks thinking about going off-grid there, and the short version is: the county itself stays out of your way a lot more than most counties do, but that just pushes the real decision-making down to your township or borough, and you need to find out which one you're in before you assume anything.

Zoning: Mifflin County has no countywide zoning ordinance. Some municipalities (townships and boroughs) have adopted their own zoning, and others haven't. Where a municipality has no zoning of its own, the County Planning & Development Department's Subdivision and Land Development Ordinance still applies to how land gets divided and developed, and I've seen it named specifically for Bratton Township, Juniata Terrace Borough, Kistler Borough, McVeytown Borough, Newton Hamilton Borough, and Wayne Township. Bottom line, call your specific municipality first.

Dwellings, tiny homes, RVs: I couldn't confirm any county-level rule here, because it's a municipal matter tied to whatever zoning and building rules that town has (or doesn't have). This is genuinely "it depends where you are," and I'd tell anyone to check with the local zoning/building officer before buying land expecting to live in an RV or tiny home year-round.

Building permits: The county doesn't issue building permits. Some municipalities contract this out, for example Newton Hamilton Borough uses a firm called Bureau Veritas, while others handle it in-house or through another arrangement. No matter who administers it locally, everyone in Pennsylvania builds under the statewide Uniform Construction Code (UCC), overseen by the PA Department of Labor & Industry.

Septic and greywater: This is state-driven through Pennsylvania's Act 537 sewage facilities program, run at the state level by DEP but enforced locally by Sewage Enforcement Officers (SEOs) that municipalities appoint. Derry Township, for instance, has its own SEO and an on-lot sewage management ordinance requiring systems to be maintained. Greywater isn't separately addressed anywhere I found, so it falls under this same septic/Act 537 framework, meaning you'd need to work through your local SEO.

Rainwater and wells: I found no Mifflin County-specific rules on rainwater harvesting, so the state's general allowance for non-potable use applies. Private wells aren't permitted at the county level either, consistent with Pennsylvania not requiring well permits statewide. If you're near a public system, the Mifflin County Municipal Authority serves parts of several townships and boroughs, but truly off-grid parcels outside those areas would rely on a private well.

Living off the grid entirely (no utility hookups): With no countywide occupancy code, whether you can legally live without grid power or public water/sewer really comes down to your specific municipality's ordinances, and I didn't find a single town's rule confirmed either way. This is a "call before you buy" situation, not a guess-and-hope one.