Buying Land in Calvert County, Maryland

A narrow peninsula: Maryland's smallest county by land area

Calvert County occupies a genuinely distinctive piece of geography: a narrow peninsula bounded by the Chesapeake Bay on its eastern edge and the Patuxent River on its western edge, making it, at 213 square miles, Maryland's smallest county by land area. That shape matters directly for land buyers -- with tidal water bordering the county on both sides rather than just one, a much larger relative share of Calvert's total land sits within reach of the Chesapeake Bay Critical Area Act's 1,000-foot buffer than in a county with a single stretch of shoreline. The state's Critical Area Commission reports Calvert's total Critical Area at 23,314.3 acres, split roughly 69% Resource Conservation Area (the strictest tier), 28% Limited Development Area, and 3% Intensely Developed Area -- an RCA-heavy mix that reflects how much of the county's shoreline edge remains in lower-density, resource-based use rather than already built out.

Commissioner government, with real zoning tools for farmland

Calvert operates under the traditional Board of County Commissioners structure -- five members, three representing districts and two elected at-large since 2022 -- rather than a charter County Executive and Council. The Commissioners exercise both legislative and executive authority, including adopting the county's zoning ordinance, which includes a dedicated Farm and Forest District (FFD) aimed at protecting the county's prime farming regions and an Agricultural Preservation District (APD) tied into the state's Maryland Agricultural Land Preservation Foundation (MALPF) program described on our Maryland state page -- a mechanism that compensates landowners who voluntarily place permanent agricultural easements on their land.

Those tools have real teeth here. Calvert set a goal in 1978 of preserving 20,000 acres of farm and forest land, reached that goal in 1997, then doubled its ambition to 40,000 acres -- and has preserved more than 32,600 acres to date through a combination of county, state, and federal programs plus land trust and private landowner participation. For a buyer evaluating farmland in Calvert, that history means a meaningful share of the county's remaining agricultural land is either already under a permanent preservation easement (which forecloses future subdivision or non-agricultural development regardless of what the zoning district otherwise allows) or is a realistic future candidate for one -- both facts worth confirming directly with the county's Agricultural Preservation office before assuming a parcel's development potential from its zoning district alone.

DC-adjacent growth pressure on what farmland remains

Calvert sits within reach of the Washington, DC metro area's southern edge, and like its Southern Maryland neighbors Charles and St. Mary's, it has felt real suburban and exurban growth pressure over recent decades even while running one of Maryland's more committed farmland-preservation programs. That combination -- genuine growth pressure on one hand, a genuinely successful and long-running preservation program on the other -- is worth understanding as two forces pulling in opposite directions on the same land, rather than assuming either one alone tells the full story of what's likely to happen to a specific parcel over time.

Septic and well permitting in Calvert follow the statewide COMAR 26.04.02 and 26.04.04 framework covered on our Maryland state page, administered locally by the Calvert County Health Department. Given the county's substantial Critical Area exposure, the state's Bay Restoration Fund septic-upgrade program is a genuinely relevant resource to ask about for any parcel here with an older conventional system, particularly one closer to the Bay or Patuxent shoreline where nitrogen-reduction priority is highest.

Cove Point: a zoning-exemption fight with a federal ending

Calvert's most unusual zoning episode has nothing to do with farmland: in 2013, the county tried to write Dominion's proposed Cove Point LNG export terminal in Lusby entirely out of the zoning ordinance, rather than approving it through ordinary rezoning or special-exception review. A Calvert County Circuit Court judge struck that ordinance down in 2014 as unconstitutional -- a Maryland court noted no other county or municipality in the state had ever attempted a complete zoning exemption like it -- yet the plant was built anyway and has been shipping LNG since 2018, because federal law gives FERC, not the county, exclusive authority over siting an LNG terminal. Our dedicated zoning page for Calvert County covers what that history means for anyone evaluating land near the facility.