Digital permit application gateway
Start with the issuing authority’s own submission lane. A complete application package, accurate valuation, and accessible inspection path are the fastest route through statutory plan review.
Recommended first click
Use the official digital gateway to submit plans, monitor review comments, pay required charges, and request inspections when the permit is issued. If the link is unavailable, use the agency website or phone number on the administrative profile to confirm the current lane.
Typical review lane
N/A - the county publishes permit-counter hours and electronic status tracking but no single standard plan-review timeline. Inspection-request submissions are expected to receive a response within 48 hours.
Treat this as a planning signal, not a guaranteed approval date. Completeness, corrections, resubmittals, and agency workload control the actual clock.
Verify the parcel is inside this agency’s service area and note whether a city, state, fire marshal, septic authority, or utility district also has approval authority.
Prepare legible plans, site information, project valuation, ownership authorization, contractor information, and any energy, floodplain, zoning, or utility documentation the issuing office requires.
Keep the permit number, approved plan set, correction comments, fee receipts, and inspection results together. Those records establish the compliance trail for the next trade.
Application documents
Before submission, call 301-475-4200 ext. 1500 (Permit Services); 301-475-4200 ext. 1580 (Inspections); 301-475-4670 (lot grading/drainage) if the project involves a change of occupancy, structural alteration, accessory structure, demolition, or work near a regulated environmental feature.
Source trail
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
St. Mary's County Department of Land Use & Growth Management, Permit Services Division is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact 301-475-4200 ext. 1500 (Permit Services); 301-475-4200 ext. 1580 (Inspections); 301-475-4670 (lot grading/drainage).
N/A - the county publishes permit-counter hours and electronic status tracking but no single standard plan-review timeline. Inspection-request submissions are expected to receive a response within 48 hours.
Use the county's permit status system for application tracking. County construction/site inspections can be requested through the online Inspection Request Form; requests are normally answered within 48 hours. For an immediate health or safety threat call DPW&T at 301-475-4200 ext. 3531. Building, electrical, mechanical, plumbing, and fire inspection requirements vary by permit and must be completed before the Certificate of Occupancy; inspections also verify zoning, stormwater, critical-area, and forest-conservation compliance.
The 2024 St. Mary's County Building Code incorporates the 2021 International Building Code, 2021 International Residential Code, 2021 International Energy Conservation Code, 2021 International Existing Building Code, and 2021 International Swimming Pool and Spa Code, with county and Maryland amendments. It also references the Maryland State Plumbing Code and 2018 International Fuel Gas and Mechanical Codes as applicable under the ordinance. All new permit applications are reviewed under the 2026 National Electrical Code beginning July 1, 2026. The county code exempts one-story detached tool/storage sheds, playhouses, or similar non-habitable accessory structures no larger than 120 square feet when outside the floodplain; fences no higher than 7 feet; retaining walls no higher than 4 feet unless supporting a surcharge or certain liquids; certain grade-level sidewalks and driveways; painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work; and some tanks and temporary stage sets. Exemption does not authorize work that violates other laws or ordinances, and a garage or carport still needs a permit even if under 600 square feet, although it may be exempt from building-code inspections.
What makes an application complete
Before you click submit, make sure the drawings agree with the site plan, project description, valuation, ownership authorization, and contractor information. If the work changes structure, occupancy, drainage, fire protection, energy performance, or utility demand, describe that scope plainly. Ambiguous narratives create correction cycles and delay the field schedule.
Save the confirmation number, payment receipt, uploaded plan set, and every correction comment. Those records are the backbone of a defensible compliance file when multiple trades or agencies share responsibility.
Submission quality check
Site: address, parcel, access, setbacks, and existing conditions are consistent.
Scope: structural, mechanical, plumbing, electrical, fire, and energy work is identified.
Closeout: inspection contacts and the final approval path are understood before work begins.