Off-Grid Living in Baltimore County, Maryland

I'll say this up front: Baltimore County is one of the tougher Maryland counties for anyone dreaming of a bare-bones off-grid setup, mostly because it's a fully zoned county with zero incorporated towns. That last part actually simplifies things a bit, since there's no separate municipal code layered on top, but it also means the county's own zoning and permitting rules apply everywhere, with no unzoned rural pockets to fall back on.

Zoning. Every parcel in the county sits inside a zone under the Baltimore County Zoning Regulations (BCZR), enforced by the Department of Permits, Approvals and Inspections (PAI). There's no "off-grid homestead" category, and just camping or living long-term on raw land without an approved dwelling isn't a recognized permanent use. If you're picturing parking a camper on vacant acreage indefinitely, that's not how this county's zoning works.

Dwellings, tiny homes, RVs. BCZR Section 415A is explicit: you can store one RV on a property if it's licensed and operational, but you cannot live in it. Mobile homes and trailers face the same restriction, residential occupancy isn't permitted, and only one can be stored per lot. Tiny houses on permanent foundations get treated like any standard dwelling and have to meet full building/zoning requirements; tiny houses on wheels get lumped in with RVs. I couldn't confirm any official carve-out that changes this.

Building permits. PAI issues permits for new construction and structural work, applying the Maryland Building Performance Standards plus county amendments. Permits run for a set period with an extension option, but if it lapses you're starting over, so don't let one expire.

Septic and composting toilets. Septic (OSDS) permitting is handled by the Groundwater Management (GWM) Section of the Department of Environmental Protection and Sustainability (EPS), following both state COMAR rules and county-specific COBAR standards. As of a 2023 change, the county no longer designs these systems for you, just sets minimum criteria, so you'll need a licensed OSDS designer and installer. Composting toilets fall under Maryland's General Permit framework, but you still need documentation from EPS/GWM confirming any required septic permit is in place.

Greywater and rainwater. I found no Baltimore County-specific ordinance for either. Greywater appears to default to the state's Environment Article rules limiting it to shower/tub/bathroom sink sources. Rainwater harvesting looks permitted under the state's COMAR environmental site design allowance, with no added county restriction confirmed, though EPS stormwater guidance for potable use wasn't fully verified.

Wells. Baltimore County, acting as the state-delegated approving authority, permits well construction through GWM. Before you can use a new well, EPS must issue a Certificate of Potability after testing.

Utility disconnection. There's no standalone "off-grid ban," but occupancy permits require an approved water source and sewage system, so full disconnection from county-approved water/waste infrastructure is effectively blocked through the normal permitting chain rather than a named statute.

Bottom line: confirm everything directly with PAI and EPS/GWM before you buy land here with off-grid plans.