Off-grid site report

Harford County, MD

39.5284, -76.3534 · 348 ft elevation

Read this before you act on anything below. This is my researched starting point for Harford 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 rulesHarford County, MD

Zoning & raw-land occupancy

RestrictedHarford County has countywide zoning under Chapter 267 of the county code, administered by the Department of Planning and Zoning; it applies to all unincorporated areas. Incorporated towns (Aberdeen, Bel Air, Havre de Grace) may have their own overriding zoning, not researched here. source

Dwellings, tiny homes & RVs

Varies locallyMobile homes and trailers are separately regulated and licensed by DILP under Chapter 173. Whether a tiny home on a foundation counts as a standard dwelling under the building code is not confirmed in official sources; ask DILP directly. source

Building permits & codes

RestrictedHarford County enforces the 2021 International Building, Residential, and Mechanical Codes with local amendments, plus a state-amended 2021 IECC energy code, per DILP. A final inspection and Use and Occupancy Certificate from DILP are required before occupancy. source

Septic & composting toilets

RestrictedThe Harford County Health Department's Bureau of Environmental Health administers septic permitting under state (MDE) delegation, requiring perc tests and a Sanitary Construction Permit pulled by a registered contractor. Composting toilets as a standalone substitute for permitted septic are not confirmed as legal by any official county source. source

Greywater reuse

Unclear - verifyNo Harford-specific greywater ordinance or Health Department guidance was found; the state Environment Article framework likely applies as a baseline, but this is not confirmed at the county level.

Rainwater harvesting

Generally allowedNo county ordinance restricting rainwater harvesting was found; state-level rules (MDE) appear to set the baseline and Harford doesn't add extra restriction that I could locate.

Private wells & water rights

RestrictedThe Harford County Health Department issues well permits, but only a Maryland-licensed well driller can file the application; a Certificate of Potability from water testing is required before the well can be used.

Living disconnected from utilities

Unclear - verifyThere's no standalone Harford County ordinance on living disconnected from the grid; occupancy still requires a DILP Certificate of Occupancy, and whether a well/septic/solar-only home qualifies is not confirmed in official sources reviewed. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.8 hrs/day
Worst month (sizes an off-grid array): 3.0 hrs/day
Yearly output per 1 kW of panels: 1,381 kWh

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Weather1991-2020

Precipitation: 48 in/yr
Heating degree days: 4,290 (moderate)
Frost-free season: Apr 6 to Nov 3

How far help isstraight-line

Hospital Upper Chesapeake Hospital: 0.7 mi
Fire station Harford County Division of Emergency Operations: 3.7 mi
Hardware store Harbor Freight Tools: 0.5 mi
Grocery ALDI: 0.2 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 21014).

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.