MD Permit Guide
Checklist

Maryland home improvement permit checklist

Which projects usually need a permit, by type. Your county has the final word.

Rules vary by county, but the pattern is similar statewide because every county uses the IRC through the Maryland Building Performance Standards. The examples below come from Prince George's DPIE's published list (source) and other county pages, so treat them as a starting point and confirm on your county's page.

Usually needs a permit

Project typeTypical rule
Additions and structural renovationsYes. PG's list includes framing, insulation, more than 2 sheets of drywall, replacing subfloor or roof sheathing, removing a wall, and widening or adding a door or window.
DecksUsually. See the deck permit guide.
Electrical workYes, separate electrical permit.
Plumbing and gasYes. In Prince George's and Montgomery, WSSC issues plumbing and gas permits.
HVAC / mechanicalYes, including replacing the outdoor unit (PG).
Basement waterproofingYes in Prince George's. Elsewhere, (confirm with the office).
Sheds and accessory buildingsAbove a size limit: 150 sq ft in PG, 200 sq ft in Howard's amendments. Elsewhere, (confirm with the office).
FencesPG: over 4 ft. Howard: exempt unless over 7 ft or enclosing a pool. Elsewhere, (confirm with the office).
Retaining wallsPG: over 2 ft. Elsewhere, (confirm with the office).
Patios, driveways, sidewalksPG: patios over 500 sq ft and extended driveways or sidewalks. Elsewhere, (confirm with the office).
GradingPG: disturbing more than 5,000 sq ft, changing drainage, or bringing in more than 100 cubic yards of fill.
Pools and hot tubsGenerally yes (building and electrical). (confirm with the office)
Solar panels and EV chargersGenerally yes. Montgomery lists eSolar and EV charging permits. (confirm with the office) elsewhere.
DemolitionGenerally yes. Baltimore City requires a city-licensed demolition contractor.

Often exempt

Painting, flooring, cabinets and countertops with no plumbing or electrical changes, and small repairs. Howard's amendments exempt roof re-covering with no structural repair on existing single-family homes. Exemptions differ by county, and zoning, Critical Area or historic rules can still apply, so (confirm with the office) before you start.

County pages

Montgomery · Prince George's · Baltimore County · Anne Arundel · Howard · Baltimore City · Frederick · Harford · all 24 →

Licensing

Contractors doing this work for homeowners need an MHIC license. See how to get or renew one.

Official sources