Off-Grid Living in Armstrong County, Pennsylvania

I'll be upfront: Armstrong County, Pennsylvania is one of those places where the honest answer to "can I do this off-grid?" is "it depends which of the county's 45 townships or boroughs your land sits in." The county itself has never adopted a countywide zoning ordinance. County planning staff (Armstrong County Planning & Development) help municipalities write their own ordinances and offer technical assistance, but roughly two-thirds of local municipalities have their own zoning, and several, per the county's own Municipal Officials Directory, explicitly have none. So step one for anyone eyeing raw land here is pulling up that directory and calling the specific township or borough office.

What the county does run countywide is a Subdivision & Land Development Ordinance (SALDO), which governs how land gets divided and developed, separate from zoning questions about dwelling type or occupancy.

For building permits, Armstrong County participates in the state's Uniform Construction Code (UCC) framework, which Pennsylvania created under Act 45 of 1999. Thirty-five of the county's municipalities jointly administer the UCC through the Armstrong County UCC Group, which contracts with Bureau Veritas to do third-party inspections. If your municipality isn't part of that group, it handles UCC administration on its own, so again, check locally.

Septic is where things get more uniform. On-lot sewage permitting runs through the Sewage Enforcement Agency of Armstrong and Indiana Counties, a state-delegated agency working under Pennsylvania's Sewage Facilities Act. They handle percolation testing, permitting, and system inspections, and under state law you can't legally occupy a structure until its sewage system is inspected, approved, and covered. Composting toilets fall back on the state's NSF Standard 41 baseline; I didn't find county-specific rules layered on top.

Greywater and rainwater harvesting don't have Armstrong County-specific ordinances that I found. Both appear to default to the state DEP framework, meaning rainwater is fine for non-potable uses but isn't an approved standalone potable supply for a permanent home, and greywater systems beyond DEP-listed options aren't clearly addressed. Worth confirming directly with the Sewage Enforcement Agency since greywater often gets folded into "sewage" definitions.

Private wells are governed by the state's Water Well Drillers License Act, with completion reports feeding Pennsylvania's Groundwater Information System through DCNR. I didn't find any Armstrong County well permitting ordinance layered on top of the state system, though individual municipalities could theoretically add their own, so ask.

Living fully off municipal utilities (no grid tie, no public water/sewer hookup) isn't addressed at the county level. Since zoning and occupancy rules are local, whether a municipality requires utility connections depends entirely on that municipality's own code, and in the townships with no zoning at all, there's likely no such mandate, but confirm before you count on it.