Off-grid site report

Howard County, MD

39.1493, -76.9052 · 427 ft elevation

Read this before you act on anything below. This is my researched starting point for Howard County, MD, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.

The local rulesHoward County, MD

Zoning & raw-land occupancy

Varies locallyZoning is countywide, set by the Howard County Council under the County Charter and Code, with rural districts (RR, RC) carrying different density and agricultural-easement rules than suburban districts. Columbia adds an HOA layer (Columbia Association) on top of, not instead of, county zoning. source

Dwellings, tiny homes & RVs

Unclear - verifyNo official Howard County source explicitly addresses tiny houses on wheels or minimum dwelling sizes; the zoning code has general definitions but classification as RV vs. dwelling isn't confirmed. Ask Planning & Zoning directly for your district. source

Building permits & codes

RestrictedBuilding permits are required and issued by the Department of Inspections, Licenses & Permits through the county's Accela portal, on top of the Maryland Building Performance Standards baseline set by the state. source

Septic & composting toilets

RestrictedThe Howard County Health Department holds delegated state authority (COMAR 26.04.02/26.04.03) as the approving authority for septic design, permitting, and inspection; composting toilets with liquid land application need a separate MDE general permit coordinated with the Health Department. source

Greywater reuse

RestrictedNo Howard County-specific greywater ordinance was found; treat this as governed by the Maryland state greywater baseline, with the county Health Department as the local contact for onsite wastewater questions. source

Rainwater harvesting

Generally allowedHoward County's Bureau of Environmental Services publishes rain barrel and cistern maintenance guidance, and rainwater harvesting counts as a stormwater credit under the county's MDE-issued MS4 permit. source

Private wells & water rights

Generally allowedPrivate wells are permitted and administered by the Howard County Health Department's Well & Septic Program under state-delegated authority; larger water appropriations still require separate MDE permits. source

Living disconnected from utilities

Unclear - verifyNo dedicated Howard County ordinance addresses full grid disconnection; it's governed indirectly through zoning, mandatory well/septic permitting, and building-permit habitability rules, so this isn't officially confirmed either way.

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.9 hrs/day
Worst month (sizes an off-grid array): 3.2 hrs/day
Yearly output per 1 kW of panels: 1,399 kWh

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Weather1991-2020

Precipitation: 47 in/yr
Snowfall: 11 in/yr
Heating degree days: 4,476 (moderate)
Frost-free season: Apr 7 to Nov 5

How far help isstraight-line

Hospital: none within range
Fire station Scaggsville Fire Station: 0.3 mi
Hardware store Silver Spring Ace Hardware: 12.3 mi
Grocery Giant: 7.3 mi

From OpenStreetMap. Road miles will be longer, often much longer in hill country.

Plan this spot

These open with this location's real numbers already filled in (ZIP 20759).

Size a solar system Heat loss & insulation Firewood per winter Rainwater harvest Garden size Panel tilt

Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.