A listing that says "20 acres, zoned agricultural" reads like an invitation. More land usually means more options: a second dwelling for aging parents, a subdivided lot for a grown child, room to build out later. In most of the country, that assumption holds. In Calvert County, it can be wrong, and the reason has nothing to do with the soil, the septic, or the seller's intentions. It has to do with a piece of paper that may have left the property years or decades before it was ever listed.
The clearest example on public record belongs to the Weems family farm in Port Republic, a hundred-acre tobacco operation Douglas Weems' grandparents bought in 1936. In 2005, the county told the family their land carried 199 transferable development rights, the units that determine how many home sites a parcel of agricultural land can eventually yield. By 2016, after Maryland's 2012 septic law reshaped how those rights get counted, that number had fallen to seven. The acreage never moved. The right to build on most of it did.
That story is old enough to be settled history, but the mechanism behind it is not. Calvert County is in the middle of rewriting the rules that govern exactly this situation, and the outcome is still unresolved as of this summer. If you're looking at a farmette, an estate lot, or raw acreage anywhere near Huntingtown, that rewrite is worth understanding before you write an offer.
Acres And Building Rights Are Two Different Assets
Calvert County created the first land preservation program in Maryland back in 1978, and it still runs one of the most active Transfer of Development Rights programs in the state. The idea is straightforward: a landowner in a designated Agricultural Preservation District can sell the development potential of their land, separate from the land itself, to a buyer in a "receiving area" like Prince Frederick or Solomons. The developer gets to build at higher density somewhere the county wants growth. The farm gets to stay a farm, on paper, forever. The county calls this a sending-and-receiving system, and it has been the backbone of Calvert's rural character since before most current residents moved in.
The complication for buyers is that a TDR sale gets recorded in land records, not printed on a real estate listing. A parcel can look exactly like its undeveloped neighbor while carrying a fraction of the building potential, because a previous owner already sold the difference. A land preservation tutorial published for Southern Maryland farmers acknowledges the problem directly: these programs "can pose challenges to land purchase, land sales and land leasing," and it is not possible to know a property's real development potential just by looking at the deed or walking the land.
Huntingtown itself sits inside this system without much room to opt out. The town has no public water or sewer system. Every home built there runs on an individual well and septic, which means every new lot has to clear the county's growth tier rules before it can clear a health department review.
The Map That Actually Limits What You Can Build
In response to a 2012 state law aimed at protecting the Chesapeake Bay from septic pollution, Calvert County adopted a Growth Tier Map on April 25, 2017, and it still governs residential density today. The map splits the county into four tiers based on sewer service and planning priorities, and the tier a parcel sits in decides how many homes can ever go on it.
- Tier I areas already have public sewer and face the fewest restrictions.
- Tier II areas are slated for future sewer service.
- Tier III areas have no sewer plans, and any major subdivision, defined as more than seven lots, requires a public hearing before the Planning Commission.
- Tier IV areas are designated for agricultural or resource protection, and major subdivisions are not allowed there at all. Only minor subdivisions of seven lots or fewer can move forward.
Separately, the county's ongoing rewrite of its zoning ordinance proposes placing Huntingtown's town center inside a Rural Neighborhood District, distinct from the sewer-served Residential Districts drafted around waterfront towns like Chesapeake Beach and North Beach. That draft has not been finalized, but it signals where the county sees Huntingtown headed: a rural designation, not a growth corridor. Combined with a Tier III or Tier IV rating on the Growth Tier Map, that is the difference between a parcel where a buyer can realistically plan future subdivision and one where the county has already decided that will not happen, regardless of acreage.
Back in 2016, when the Growth Tier Map was first being finalized, Commissioners' Vice President Tom Hejl called the underlying state law "the biggest land-grab in the state's history." Whatever you think of that framing, the practical effect on landowners like the Weems family was real, and it still shapes what a Tier III or Tier IV property can become today.
The Rules Are Being Rewritten Right Now
Calvert County has held a moratorium on new Agricultural Preservation Districts since 2013, after an oversupply of TDRs on the market stalled the program. That moratorium technically remains in effect, but county planners have spent the past year trying to end it. A draft rewrite of the program's rules and regulations went to public comment in mid-2025, and a planning commission hearing that August found the proposed language inconsistent with the county's comprehensive plan, sending staff back to revise it again.
The fight since then has centered on density. Rural planner Jennifer David has said the program's density cap works out to one dwelling per 25 acres, and that only primary residences and buildable lots count toward that limit. The sticking point has been tenant houses. The revised draft would count a tenant house toward a property's density total if it qualifies for an agricultural use assessment, a change the Calvert Farm Bureau has pushed back on directly, arguing that tenant housing supports farm labor and should not eat into a family's building rights. Calvert's planning and zoning director, Jason Brinkley, has said existing landowners under contract in the program are unlikely to be affected by whatever the final rules look like, and Commissioner Mark C. Cox Sr. has raised the possibility of legal exposure if the county tries to apply new terms retroactively to the more than 500 properties already enrolled.
As of July 2026, the county was still working toward a public hearing on the final draft. Nothing has been formally adopted. If you are under contract on acreage anywhere near Huntingtown right now, you are buying into a program mid-revision, not a fixed set of rules.
What This Means Before You Write An Offer
None of this should scare a buyer away from acreage near Huntingtown. It should change what you ask before you get attached to a property.
- Ask whether the parcel sits inside an existing Agricultural Preservation District, and if so, request the current TDR certification on file with the county.
- Confirm the parcel's Growth Tier designation directly with Planning & Zoning rather than assuming from the listing description.
- If the seller says development rights were never sold, get that in writing and verify it against county land records, not just the seller's memory.
- Ask specifically about family conveyance lots if you're planning to eventually split the land among heirs. Those lots run under separate rules that the current rewrite is not expected to touch.
- If a tenant house or accessory structure already exists on the property, ask how it is currently classified, since that classification affects how much building capacity remains.
A title search alone will not surface most of this. TDR sales and Agricultural Preservation District enrollment live in specialized county records, and a generalist title company may not flag them the way a local closing attorney familiar with Calvert's program would.
FAQ
Does this affect land inside Huntingtown's platted subdivisions, or only large open parcels? The TDR and Growth Tier system is most relevant to larger, undeveloped, or agriculturally zoned parcels. A home already built on a standard residential lot inside an established subdivision is not typically affected the same way, since the development decision for that lot was already made when the subdivision was approved.
Can I still build one house on land inside an Agricultural Preservation District? Generally yes. The program is built to limit further subdivision, not to prevent a single primary residence. The restrictions bite hardest when a buyer's plan involves adding a second dwelling, splitting the parcel, or increasing density beyond what the property's certified rights allow.
Who do I actually call to check a specific property? Calvert County's Department of Planning & Zoning administers both the Agricultural Preservation Program and the Growth Tier Map, and they can confirm a parcel's district status and remaining development rights directly.
Acreage near Huntingtown is still some of the most distinctive land in Southern Maryland, and for the right buyer, a farmette with real space is worth the extra homework. The point is not to avoid this market. It's to buy it with your eyes open, and to have someone in your corner who knows which questions the listing sheet will never answer.
If you're weighing a farmette, an estate lot, or acreage anywhere in the Huntingtown area, The Beckman Group can help you get straight answers from the county before you're emotionally attached to a property that can't do what you need it to. Let's connect and book an appointment.
