St. Mary’s County Landlord Guide: NAS Patuxent River, the Pentagon on the Patuxent, and a Rental Market Built Around Naval Aviation
St. Mary’s County is where Maryland was born — the English settlers who arrived at St. Clement’s Island in 1634 and established the colony’s first capital at St. Mary’s City created the foundation of what would become Maryland. Four hundred years later, the county remains defined by water — the Potomac River forming its western boundary, the Patuxent River its eastern, and the Chesapeake Bay its southeastern tip — and by the military presence that has made it one of Maryland’s more economically stable rural counties. Naval Air Station Patuxent River is the dominant institution of St. Mary’s County’s modern economy, and understanding what Pax River is, what it does, and what kind of tenant population it generates is the most important thing a landlord can know before investing in the county’s rental market.
The county’s position on a peninsula — accessible from the north via Maryland Route 5 and US-301 through Charles County, but bounded by water on three sides and offering no through-routes to anywhere else — gives it an isolation that concentrates its economy and its rental market around Pax River in a way that few other Maryland military counties experience. There is no significant commuter population flowing to and from Baltimore or D.C. the way there is in Calvert or Charles counties to the north. If you live in St. Mary’s County, you almost certainly either work at or for Pax River, work in the local service economy that supports the base community, or have chosen the county for its waterfront rural character with some form of remote or location-flexible employment. This narrower economic base makes the military-landlord relationship central rather than peripheral.
NAS Patuxent River: What It Is and Why It Matters
Naval Air Station Patuxent River is the United States Navy’s primary center for research, development, testing, and evaluation of naval aircraft, systems, and weapons. The Naval Air Systems Command (NAVAIR), which manages all naval aviation procurement, is headquartered at Pax River — making the installation not just a base but an operational command center whose reach extends to every Navy aircraft program in the country. The Naval Test Wing Atlantic and the U.S. Naval Test Pilot School, where the Navy’s most elite aviators train to become test pilots, are at Pax River. So are numerous defense contractors — Lockheed Martin, Boeing, BAE Systems, Northrop Grumman, Leidos, and dozens of others — who maintain facilities near the base to support the testing and procurement programs NAVAIR manages.
The result is that Pax River’s economic footprint extends well beyond its military headcount. The civilian contractor and support workforce at and near the installation is substantial — often estimated to exceed the uniformed military population — and these civilian workers are the backbone of the stable, professional-income rental demand that makes St. Mary’s County a more attractive landlord market than its rural, peninsula geography might suggest. An engineer at Lockheed Martin supporting an F/A-18 upgrade program, a systems analyst at NAVAIR, or a budget analyst at the Naval Air Warfare Center are all St. Mary’s County renters with professional-grade incomes, transparent employment verification, and no particular reason to leave the county in the near term.
The active-duty military population at Pax River adds a different and more complex dimension. Naval aviators, test pilots, and their families rotate through the installation on the standard military PCS cycle — typically two to three years at a given duty station. This rotation is a routine feature of military life that affects every lease involving an active-duty household, and St. Mary’s County landlords near the base must understand and plan for it just as thoroughly as their counterparts near Aberdeen Proving Ground or Joint Base Andrews.
SCRA at Pax River: The Full Picture
The Servicemembers Civil Relief Act applies to every active-duty military household in St. Mary’s County. The SCRA’s lease termination provision allows a qualifying service member who receives deployment orders of 90 days or more, or permanent change of station orders, to terminate a residential lease by providing written notice and a copy of the military orders. The termination becomes effective 30 days after the next rental payment date following notice — giving landlords approximately 30 to 45 days from the notice to the end of the tenancy.
At an installation like Pax River, where test pilots and naval aviators operate some of the most demanding aircraft in the Navy’s inventory, deployment orders can arrive on relatively short notice and can involve extended periods away from the installation. A test pilot who is detached for an extended evaluation program at another base, or who receives orders to a fleet squadron for a deployment, may exercise SCRA rights to terminate a St. Mary’s County lease even if they fully intended to complete the tenancy when they signed. This is not a breach of contract or bad faith — it is the operation of federal law in exactly the way Congress intended, and St. Mary’s County landlords who resent or resist it are operating against the grain of an inevitable reality.
The practical response is the same as in every military market: maintain units in show-ready condition, build SCRA turnover into the operating model, include a professional military addendum in leases to active-duty households, and keep marketing channels current so that re-leasing after an SCRA termination is a matter of weeks rather than months. Given the steady rotation of military personnel through Pax River, the pipeline of incoming service members who need housing in Lexington Park and surrounding communities is continuous and reliable.
The Test Pilot School presents a specific and interesting SCRA consideration. TPS students — who are typically experienced naval aviators attending a one-year curriculum — arrive, complete their training, and receive new orders to test squadrons or other commands at the end of the school year. A TPS student who signs a one-year lease and then receives PCS orders to a test squadron elsewhere at graduation may exercise SCRA rights if the orders qualify. Structuring leases to TPS students with awareness of their program timeline — and being prepared for potential SCRA terminations at the end of the academic year — is advisable for landlords near the school.
Lexington Park: The County’s Rental Core
Lexington Park is the unincorporated community that grew up around NAS Patuxent River and is today the county’s most densely populated area. Unlike Leonardtown, which is a historic small town with governmental and commercial functions, Lexington Park is an entirely base-driven community — its commercial strips, apartment complexes, townhome communities, and retail development exist in their current form because of Pax River, and they would contract significantly without it.
For landlords, Lexington Park offers the most active rental market in the county and the most direct access to both the military and civilian contractor tenant populations. Apartment and townhome rents in Lexington Park typically range from $1,100 to $1,700 for well-maintained two-bedroom units, with newer construction and base-adjacent locations commanding the higher end of that range. The tenant population is predominantly military households and defense workers, with a supporting cast of healthcare workers, teachers, county government employees, and local service sector workers who serve the base community.
The community of California, Md. (adjacent to Lexington Park) and Great Mills round out the primary rental geography near the base. These communities offer similar tenant demographics to Lexington Park in a somewhat lower-density context. The retail and commercial development along Route 235 through this corridor serves both communities.
Leonardtown and the Historic County Character
Leonardtown, the county seat, is a genuine small town with a historic character that distinguishes it sharply from Lexington Park. Its brick storefronts, courthouse square, and location on Breton Bay — a tributary of the Potomac — give it a quality of place that attracts a different kind of renter: professionals who prefer a walkable small-town environment over the strip-commercial character of the Lexington Park corridor, retirees seeking waterfront adjacency, and county government workers for whom proximity to the courthouse and county offices is practical.
Leonardtown’s rental inventory is smaller than Lexington Park’s and its housing stock is older. Pre-1978 lead paint compliance applies to a meaningful share of the town’s residential structures. Waterfront properties on Breton Bay carry the same Critical Area compliance considerations that apply throughout the county’s extensive tidal shoreline.
St. Mary’s City, a few miles south of Leonardtown on the banks of the St. Mary’s River, is the site of Maryland’s original colonial capital and today hosts Historic St. Mary’s City — an outdoor living history museum and archaeological research center — and St. Mary’s College of Maryland, a selective public liberal arts college. The college generates a small but stable student and faculty rental market in its vicinity.
St. Mary’s College of Maryland
St. Mary’s College of Maryland, situated on the historic grounds of the original colonial capital, is a selective public liberal arts college with an enrollment of approximately 1,600 students. It is designated Maryland’s public honors college and offers a residential campus experience that limits off-campus student rental demand compared to larger universities. The college’s faculty and staff, however, form a secondary rental demand segment in the St. Mary’s City and Leonardtown areas — professionals with academic employment stability whose income verification is straightforward.
The college’s presence adds a cultural and intellectual dimension to the county’s character that is not reflected in its economic statistics alone. Faculty, visiting scholars, and the college’s professional staff add to the county’s supply of stable professional renters beyond the base-driven population.
Waterfront Leasing in St. Mary’s County
St. Mary’s County’s peninsula geography gives it more linear miles of tidal shoreline than most Maryland counties — along the Potomac River to the west, the Patuxent River to the east, the Chesapeake Bay to the south, and numerous tidal creeks and rivers including the St. Mary’s River, the Wicomico River, Breton Bay, and others. This shoreline generates a genuine waterfront rental market for properties with dock access, water views, or proximity to the Bay or rivers.
Lease provisions for St. Mary’s County waterfront properties follow the same framework discussed throughout this guide series for Maryland waterfront markets: dock and pier maintenance responsibility explicitly addressed, permitted watercraft specified, liability insurance requirements stated, riparian rights during the tenancy defined, and Critical Area buffer compliance confirmed before any property modification. Properties on private well and septic — the standard in the county outside the Lexington Park commercial corridor — require the standard habitability maintenance provisions and tenant reporting obligations.
Flood zone status for waterfront and near-waterfront properties warrants verification through the FEMA Flood Map Service Center. St. Mary’s County’s low-lying tidal shoreline includes areas within FEMA Special Flood Hazard Areas. Disclosure of flood zone status, appropriate flood insurance coverage, and tenant awareness of flood risk are all appropriate for affected properties.
BAH and Military Income Verification
Active-duty military tenants at Pax River receive Basic Allowance for Housing (BAH) calculated at rates reflecting local median rents. The BAH rate for the St. Mary’s County area is publicly available from the Department of Defense and provides a transparent benchmark for understanding what the military housing allowance covers at your asking rent. Military income — base pay plus BAH plus other allowances as applicable — is verifiable through Leave and Earnings Statements or the MyPay system and provides some of the most transparent income documentation available in any rental market.
Civilian contractor employees bring their own income transparency: federal contractor compensation is often benchmarked against government pay scales, companies like Lockheed Martin and Northrop Grumman have well-understood compensation structures, and professional employees in engineering, systems analysis, and program management roles typically have straightforward W-2 income that standard documentation requirements will surface. The combination of military and civilian contractor income in St. Mary’s County produces one of the more financially transparent rental applicant pools of any rural Maryland county.
The Leonardtown District Court
All St. Mary’s County evictions file with the District Court of Maryland for St. Mary’s County at 41605 Courthouse Drive in Leonardtown, MD 20650. Phone: (301) 475-4567, hours Monday through Friday 8:30 a.m. to 4:30 p.m. The 7th Judicial Circuit serves St. Mary’s, Calvert, and Prince George’s counties; St. Mary’s County matters file in Leonardtown. The court processes a moderate docket for a county of 115,000, and FTPR hearings are typically scheduled within 5 to 10 business days of filing. Total timeline from filing to possession in a straightforward case runs approximately 25 to 55 days.
Maryland’s standard eviction procedure applies: FTPR immediately upon nonpayment, right of redemption up to four times in 12 months, Breach of Lease requires prior notice and cure, Holding Over requires 60-day written termination notice for month-to-month tenancies. Business entities must retain a Maryland attorney; individual landlords may appear pro se. Before filing any eviction action against an active-duty service member, confirm SCRA compliance with a Maryland attorney.
St. Mary’s County as a Landlord Market
St. Mary’s County is a focused, stable military-economy rental market that rewards landlords who understand its specific dynamics. The employment base is not diverse — Pax River is the county’s central economic institution, and its health is the county’s economic health — but NAS Patuxent River is not going anywhere. NAVAIR’s mission is central to the Navy’s operational capability, the Test Pilot School produces officers who serve throughout the fleet, and the defense contractor ecosystem that has built up around the installation has deep roots in Maryland’s defense economy.
For landlords, this means consistent demand from a financially stable, income-transparent tenant pool that includes both active-duty households (with SCRA considerations built in) and civilian defense workers (with longer expected tenure and no SCRA exposure). The regulatory environment is clean — no county registration, no local rent control effort, no complex municipal code in the primary rental market area. The main operational requirements are SCRA literacy, waterfront lease discipline for Bay and river properties, lead paint compliance for older stock, and Critical Area awareness for improvement projects near tidal water. All of these are manageable for landlords who approach them deliberately. St. Mary’s County is, in the end, a market that rewards patient naval aviation-aware landlords who build their practices around the realities of life at the tip of Maryland’s southernmost peninsula.
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