Northeast
Home projects in Maryland: costs, permits and rules
Maryland Building Performance Standards, based on the IRC. Chesapeake Bay Critical Area rules add impervious-surface and buffer review to driveways, decks and additions within 1,000 feet of tidal water.
Model reviewed August 2026
Cost index
+12%
vs national baseline
Permit fees
+10%
vs national baseline
Code
Statewide
one code, local enforcement
Population
6.2M
Baltimore, Columbia
Who issues building permits in Maryland?
Local dept., statewide code
Permits in Maryland are issued by the city building department when the property is inside city limits, and by the county otherwise. The requirements come from maryland building performance standards, based on the irc, which applies statewide.
Owner-builder: Homeowner permits allowed on owner-occupied property.
Maryland project costs
Modeled from national baselines and the state cost index. Local pages refine these further.
| Roof Replacement | $11,400 – $38,400 |
|---|---|
| AC Replacement | $6,000 – $18,000 |
| Fence Installation | $2,800 – $12,700 |
| Water Heater Replacement | $1,400 – $6,300 |
| Pool Installation | $44,900 – $135,800 |
| Window Replacement | $8,800 – $40,100 |
| Electrical Panel Replacement | $2,200 – $8,000 |
| Generator Installation | $7,600 – $25,900 |
| Solar Panel Installation | $17,300 – $55,300 |
| Kitchen Remodel | $20,400 – $104,100 |
Project guides for Maryland
Cities with local permit data in Maryland
Maryland counties
Outside city limits the county issues the permit. 9 Maryland counties are inventoried.
Maryland permit questions
Do you need a permit for home renovations in Maryland?
Maryland enforces a statewide code (Maryland Building Performance Standards, based on the IRC), so permit requirements are broadly consistent across the state, but the permit itself is issued by your city or county. Structural, electrical, plumbing, mechanical and envelope work almost always require one.
Can a homeowner pull their own permit in Maryland?
Homeowner permits allowed on owner-occupied property. Owner-builder status usually makes you responsible for code compliance and for any unlicensed work performed on the property, and many jurisdictions restrict resale within a year of the permit.
Are home projects more expensive in Maryland?
Our model puts Maryland at 12% above the national baseline for installed residential work, with permit fees at 10% versus baseline. Chesapeake Bay Critical Area rules add impervious-surface and buffer review to driveways, decks and additions within 1,000 feet of tidal water.
Sources
Sources & verification
Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.