Maryland

Buying Land in Harford County, Maryland

Seat Bel Air. Harford sits where the Chesapeake Bay meets the Susquehanna River, giving it real Critical Area exposure along its southern and eastern edge, while a genuinely large, long-running farmland preservation program protects tens of thousands of acres inland. Aberdeen Proving Ground, a major active Army installation, occupies a substantial share of the county's southeast under its own federal rules entirely separate from county zoning.

Aberdeen Proving Ground: Federal Land, Federal Rules

Case-by-case / verify locally

Aberdeen Proving Ground, an active U.S. Army installation of roughly 72,000 acres, occupies a large share of southeastern Harford County. Federal land inside county boundaries is not subject to county zoning, taxation, or ordinance, and part of it (the Edgewood Area) is an EPA Superfund site with a documented legacy of unexploded ordnance and chemical-munitions contamination and ongoing access restrictions. None of this affects privately held land outside the installation's boundary, but it does mean the post itself is never a source of buildable private acreage.

More Than 64,000 Acres of Farmland Already Preserved

Generally favorable

Harford's farmland preservation program dates to 1977 and has preserved more than 64,500 acres -- roughly 26% of the county's total land -- placing Harford among the top 5 counties nationally for total acreage preserved, including the roughly 67,000-acre Deer Creek Rural Legacy Area. See our dedicated conservation-easements page for Harford County for the program's mechanics and a 2024 eligibility update. A preserved parcel carries a permanent easement that binds every future owner; confirm status directly before assuming a farm's development potential.

Chesapeake Bay Critical Area at Havre de Grace and the Lower Susquehanna

Case-by-case / verify locally

Harford is one of roughly 16 Maryland counties administering a certified Critical Area program, reflecting its Chesapeake Bay shoreline near Havre de Grace and the tidal reach of the lower Susquehanna River. A parcel near these waters -- even one that doesn't look directly waterfront -- can fall inside the 1,000-foot Critical Area boundary; confirm with the county before assuming standard zoning density applies.

Aberdeen Proving Ground: a major federal presence, entirely outside county zoning

Aberdeen Proving Ground is one of the U.S. Army's oldest and largest testing installations, occupying roughly 72,000 acres across Harford County's southeast, including the peninsula areas of Gunpowder Neck and the Edgewood Area near the town of Edgewood. Because it is federal land, the post sits entirely outside Harford County's zoning, taxation, and permitting authority -- it is not, and never will be, a source of land for sale to the general public, and a land buyer researching Harford County can treat the installation's footprint as simply off the map for purchase purposes.

What is worth knowing, for context rather than direct relevance to buying nearby private land, is that the installation's Edgewood Area has a documented history as a chemical-weapons research, testing, and destruction site dating to World War II, and today carries EPA Superfund status with ongoing land use controls, unexploded ordnance concerns, and formal access restrictions specifically within the post's own boundary. This research pass found no evidence that contamination or ordnance risk extends onto surrounding private property outside the installation, so this is not a reason for caution on nearby civilian parcels -- but it does explain why maps of Harford County show a very large block of southeastern land as permanently off-limits to private development regardless of how zoning maps elsewhere in the county are drawn.

A large, long-running farmland preservation program

Harford County's agricultural land preservation effort dates back to 1977 -- older than Carroll County's better-known program -- and has preserved more than 64,500 acres, or roughly 26% of the county's total land area, placing Harford among the top 5 counties in the entire United States for total acreage preserved through a local farmland-easement program. That total includes participation in Maryland's Rural Legacy Program, most notably the roughly 67,000-acre Deer Creek Rural Legacy Area, alongside the smaller, cross-county Manor Conservancy Rural Legacy Area shared with Baltimore County. A 2024 County Council reform reduced the acreage a property needs to qualify and expanded eligibility to additional zoning categories -- see our dedicated conservation-easements page for Harford County for the program's full mechanics, funding, and what that 2024 change means for a smaller farm parcel.

For a buyer, the practical implication is the same one that applies anywhere farmland preservation runs deep: don't assume a Harford County farm parcel's zoning designation is the last word on its development potential. Given that more than a quarter of the county's land is already permanently preserved, confirm whether a specific parcel already carries a recorded HALPP, MALPF, or Rural Legacy easement with the county's Agricultural Preservation office and a title search before assuming any particular subdivision or development scenario.

Government structure, Critical Area exposure, and septic/well basics

Harford is a charter county: voters adopted home rule on November 7, 1972, and the county is now governed by a directly elected County Executive alongside a seven-member County Council (five district seats, two at-large) -- one of nine Maryland counties with this structure rather than a traditional Board of County Commissioners. Zoning and land-use ordinances are enacted locally under that charter authority rather than requiring individual approval from the Maryland General Assembly.

Harford's Chesapeake Bay shoreline near Havre de Grace and the tidal lower Susquehanna give it real Critical Area exposure, placing it among the roughly 16 Maryland counties administering a certified local Critical Area program under the state's 1984 Critical Area Act (covered in full on our Maryland state page). Septic and well permitting follow the same statewide COMAR 26.04.02 and 26.04.04 standards used everywhere in Maryland, administered locally by the Harford County Health Department as the Approving Authority -- and given the county's Critical Area exposure, the state's Bay Restoration Fund for nitrogen-reducing septic upgrades is worth asking about for any parcel with an existing older system near tidal water.

What we could and couldn't confirm

Harford County's FIPS code (24025) is drawn from this project's own Maryland ledger. The charter-government structure and 1972 adoption date come from the county's own government-history page. Aberdeen Proving Ground's acreage (~72,000 acres) and its Edgewood Area's Superfund/UXO history are corroborated across an ATSDR public health assessment and EPA's own Superfund site profile; this page does not assert any contamination or ordnance risk on private land outside the installation's boundary, since this research pass found no source supporting that. The farmland-preservation figures (64,000+ acres preserved, ~67,000-acre Deer Creek Rural Legacy Area) are corroborated across the county's own Agricultural Preservation page, Harford Land Trust reporting, and a Maryland DNR press release, though this page did not independently verify a single, current, as-of-date total. Harford's inclusion among Maryland's roughly 16 Critical Area counties is drawn from a WebSearch-derived synthesis rather than a primary Maryland Department of Planning jurisdiction list, and is corroborated by the City of Havre de Grace's own Critical Area page. Direct WebFetch to harfordcountymd.gov was not attempted; findings otherwise rely on WebSearch-indexed content.

Verify directly with: the Harford County Department of Planning and Zoning for zoning and Critical Area status on a specific parcel, the county's Agricultural Preservation office for easement history on a farm property, and the county Health Department for septic/well permitting

Who to Call Before Buying Land in Harford County

Direct WebFetch to harfordcountymd.gov was not attempted in this research pass, so current department structure, fees, and turnaround times should be confirmed directly. Aberdeen Proving Ground is federal land administered by the U.S. Army, not by any county office listed here.

Planning & Zoning

Harford County Department of Planning and Zoning

Zoning district lookups, subdivision review, and the county Comprehensive Plan.

Official website →

Other

Harford County Agricultural Preservation

Confirming whether a specific farm parcel already carries a HALPP, MALPF, or Rural Legacy easement.

Official website →

Septic / Onsite Wastewater

Harford County Health Department

Septic (COMAR 26.04.02) and well construction (COMAR 26.04.04) permitting, and Bay Restoration Fund upgrade eligibility.

Official website →

GIS / Parcel Records

Harford County GIS

Parcel boundary lookups, zoning maps, and Critical Area overlay layers.

Official website →

Want to know if this specific parcel actually works?

Tell us what you're looking at and we'll connect you with a local land specialist who can help you sanity-check it before you go further.

Get local guidance

Topics Specific to Harford County

Conservation Easements in Harford County, Maryland: A Top-5 National Program →

Sources

History of Harford County Government — Harford County, MD (accessed 2026-09)
U.S. ARMY ABERDEEN PROVING GROUND, EDGEWOOD AREA (Public Health Assessment) — Agency for Toxic Substances and Disease Registry (ATSDR) (accessed 2026-09)
Aberdeen Proving Ground (Edgewood Area) | Superfund Site Profile — U.S. EPA (accessed 2026-09)
Agricultural Preservation — Harford County, MD (accessed 2026-09)
Defending Program Open Space Funding — Harford Land Trust (accessed 2026-09)
$2.1 Million Approved for Rural Legacy Program — Maryland Department of Natural Resources (accessed 2026-09)
Chesapeake Bay Critical Area — City of Havre de Grace, MD (accessed 2026-09)

Last reviewed 2026-09