Fees, valuation & enforcement
Permit fees are a project input. Enforcement exposure is a project risk. Use the official schedule where available, then confirm valuation, trade permits, plan review, and inspection charges with the Authority Having Jurisdiction.
Official fee pathway
The final charge may depend on declared construction value, occupancy classification, square footage, plan review, state surcharges, trade permits, technology fees, and inspection activity. Do not use a neighboring city’s fee table as a substitute for this jurisdiction.
Fee desk contact
301-475-4200 ext. 1500 (Permit Services); 301-475-4200 ext. 1580 (Inspections); 301-475-4670 (lot grading/drainage)
Ask the counter to confirm current charges before submitting a project with multiple trades or a change of use.
Financial exposure
Plan for building, mechanical, plumbing, electrical, fire, energy, zoning, septic, right-of-way, or other reviews that the project scope triggers. The lowest initial permit fee is not always the lowest project cost.
Enforcement exposure
When work begins without authorization, the agency may halt the site, require corrective plans, impose additional fees, withhold inspection release, or require concealed work to be exposed for review.
Closeout exposure
A missing final inspection or certificate can complicate occupancy, refinancing, sale, insurance, and utility connection. Preserve the approved plans and signed inspection record through closeout.
Professional field note
Even when a cosmetic or minor project does not require a building permit, zoning, floodplain, shoreline, historic, utility, fire, or right-of-way controls may still apply. Confirm the full jurisdictional picture before work starts.
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.
Why permit costs vary
Building departments commonly calculate charges from valuation, occupancy, floor area, project type, plan review effort, trade scope, state surcharges, and inspection activity. A remodel that appears small on paper may still trigger structural, energy, fire, or utility review. Ask the permit counter which disciplines apply before you finalize the construction budget.
The same discipline applies to enforcement. Correcting unpermitted work after finishes are installed can require demolition, revised plans, additional inspections, and schedule disruption. Authorization is usually the less expensive project-management decision.