Building permits, zoning and land rules in Calvert County, Maryland

Yes. Construction work in unincorporated Calvert County that is subject to the Calvert County Building Code needs a permit approved, paid for and issued before work starts¹. Calvert County adopted the International Building Code and International Residential Code as its building code, with local amendments². Calvert County publishes permit-fee schedules, but the amount varies with permit type, floor area, inspection count and project details; the worksheet is only an estimate, so obtain the official amount from a Permit Coordinator¹². Calvert County exempts owners building their own dwelling on their own property from the county building-contractor license, but proper building permits remain required; ask Inspections and Permits whether Maryland home-builder registration applies to your project⁷. Inside North Beach, covered work requires a town building permit, and new construction also requires a county building permit¹³. Septic systems inside North Beach remain under Calvert County Health Department Environmental Health Services¹⁴.

The Calvert County Division of Inspections and Permits issues building, grading, electrical, plumbing and gas permits and performs field inspections¹. The division sits within the Department of Planning & Zoning, which administers the zoning ordinance, subdivision regulations and building code¹⁵. Applications may be submitted through the Encompass portal, in person, by drop box or by mail; incomplete or inaccurate applications are rejected¹. Calvert County residential inspections generally require at least 24 hours' notice; requests after 3:00 p.m. may miss the following day¹⁶. Required stages include checks before concrete, backfill, insulation and wall covering, and at completion; foundation location surveys must be approved before a framing inspection¹⁶. Plumbing and electrical work need separate permits and inspections, and concealed work may have to be exposed¹⁶.

Calvert County zoning rules apply to unincorporated land and depend on the parcel and district^3,11. Calvert County's current Zoning Ordinance took effect March 1, 2025, and separate materials are listed for the Dunkirk, Huntingtown, Lusby, Owings, Prince Frederick, Solomons and St. Leonard areas^3,17. Minimum lot area for a single-family home ranges from 1 acre to 25 acres by district and development pattern^6,8,18. FFD and RD detached homes have front setbacks of 100 feet from listed Maryland routes, 25 feet from interior subdivision roads and 60 feet from other roads, plus 10-foot side and 35-foot rear setbacks^8,18. RCD and RND use those same distances, while WCD uses 25-foot front, 6-foot side and 20-foot rear setbacks; roadway-buffer rules may modify them⁶. Chesapeake Beach and North Beach administer their own zoning; septic systems remain with Calvert County Health Department Environmental Health Services^4,19,20. We could not confirm a minimum dwelling size or building-height limit; ask Planning & Zoning about the parcel¹⁵.

Calvert County Health Department Environmental Health Services administers the local septic process under authority delegated by the Maryland Department of the Environment⁴. A Sanitary Construction Permit is required for on-site sewage disposal installations and must be obtained by a Calvert County licensed septic installer⁴. No part of a system can be covered or used until it is inspected and approved, and a Calvert County plumbing inspector must check the sewer line within 5 feet of the house before covering⁴. Alternative systems that distribute treated effluent to soil may be permitted, but they require design by a qualified third-party soil consultant, state co-review and a recorded agreement before the permit application; this does not confirm that composting toilets or other non-OSDS sanitation methods are allowed⁴. The county's soil data rates 0% of its soils as free of severe limits for a conventional drain field, so make the site evaluation an early contingency²¹. Environmental Health also evaluates sites and issues permits for new individual wells, and only licensed well drillers may apply⁵.

We could not confirm permission for long-term RV living on private land in unincorporated Calvert County; ask Planning & Zoning before planning to live in an RV while building¹⁵. Calvert County does allow one recreational vehicle or manufactured home as temporary shelter when a residence is made unlivable by a fire or other disaster not intentionally caused by the owner, but a Zoning Officer permit is required and an extension is needed beyond 6 months²². One manufactured home may occupy a buildable lot where that use is permitted with conditions, provided the unit has a permanent continuous foundation, pitched roof, wood-or-masonry appearance and current HUD-standard construction²³. A tiny home can use that path only if it qualifies as a manufactured home, and building-permit and well or septic review also apply¹¹. Ask Planning & Zoning how a site-built or modular tiny home is classified¹⁵. Farm campgrounds are separate: on a qualifying farm of at least 20 acres, only tents are allowed, while RVs and travel trailers are prohibited²².

1. Call the Department of Planning & Zoning to confirm the zoning district, minimum lot area, and setbacks that apply to the parcel¹⁵.
2. If the lot isn't on public sewer, contact Environmental Health Services for a septic site evaluation before you finalize house plans - the soil ratings flag severe limits for conventional drain fields^14,21.
3. If the lot needs a well, have a licensed well driller apply to Environmental Health Services for the required new-well permit⁵.
4. Submit a complete building-permit application to the Division of Inspections and Permits through Encompass, in person, by drop box or by mail; wait until the building permit is issued before applying for electrical or plumbing permits¹.
5. If the driveway will connect to a county road, get a grading permit from the Department of Public Works; if it connects to a state highway, get an access permit from MDOT's State Highway Administration first^10,24.
6. Schedule required inspections in sequence, giving at least 24 hours' notice and requesting by 3:00 p.m. for possible next-business-day scheduling¹⁶.
7. Do not occupy the new home until all building, grading, electrical and plumbing finals are approved and the Division of Inspections and Permits has issued the Certificate of Occupancy¹.

Check whether the parcel sits in a Special Flood Hazard Area before you buy - all development there needs a permit, and a new structure or a major improvement can trigger extra documentation²⁵. If the parcel is near the Chesapeake Bay shoreline, check whether it falls in the Critical Area, where lot coverage is generally capped at 15%²⁶. On a larger tract, note that Calvert's subdivision rules only allow major subdivisions on individual septic systems in Tier III growth areas, while Tier IV areas are limited to minor subdivisions²⁷. Clearing or grading a tract of 40,000 square feet or more can trigger forest-conservation requirements, though several project types can qualify for an exemption²⁸. The nearest city of 100,000 or more people is about 33 miles from the county center, and the typical property-tax bill runs about $3,858 a year at an effective rate near 0.9%²¹.