Maryland Building Permits — Complete Guide (2026)
Find, Apply & Track Permits in Cities and Counties Across Maryland
Maryland has strong statewide building code enforcement. Montgomery and Prince George's Counties (DC suburbs) have the most complex permitting systems. Baltimore City operates its own separate permit system.
How building permits work in Maryland
Building permit requirements and processing times in Maryland vary by city and county. Use the links below to apply, check status, schedule inspections and find permit information for your location.
Learn the step-by-step permit process →Not sure where to apply?
Enter your city or address to find your permit office.
Permit costs by type — Maryland
| Permit Type | Fee Range | Processing Time | Notes |
|---|---|---|---|
| Electrical | $100–$275 | 1–5 days | Licensed master electrician required |
| Plumbing | $85–$250 | 1–5 days | Licensed master plumber required |
| HVAC / Mechanical | $100–$300 | 2–6 days | Heat pump adoption growing |
| Roofing | $125–$375 | 1–5 days | Full replacement permit required |
| New Construction | $700–$2,200 | 3–8 weeks | Montgomery County among most complex |
| Room Addition | $400–$1,200 | 2–7 weeks | Critical Area rules may apply near Bay |
| Deck / Patio | $150–$500 | 1–5 weeks | Frost depth 30 inches |
| ADU | $400–$1,000 | 2–6 weeks | Several counties have approved ADU allowances |
| Solar | $100–$300 | 1–5 days | Maryland solar incentive programs |
| Pool | $200–$600 | 2–5 weeks | Barrier fence required statewide |
Major Maryland cities — apply online
Most Maryland building permits are issued by cities. Click your city to access the permit portal, apply online, or check permit status.
Permit costs by county — top Maryland counties
County building departments handle unincorporated areas. Click a county to access its permit portal directly.
How to get a building permit in Maryland
Find your county or city building department
Maryland's 23 counties and Baltimore City each have their own systems. Montgomery County (MCDPS), Prince George's County (DPIE), and Baltimore City (DHCD) have online portals.
Check Critical Area status
Properties within 1,000 feet of tidal waters, tidal wetlands, or the Chesapeake Bay and its tributaries are in the Critical Area. Additional permits and restrictions apply.
Licensed master tradespeople
Maryland requires master electricians and master plumbers to pull permits for their respective trades. Journeyman-only work is not sufficient for permit applications.
Submit application with plans
Structural projects require architectural plans. Maryland energy code compliance documentation is required for most projects.
Phase inspections
Maryland counties require inspections at each phase. Montgomery County inspections can be scheduled online.
ADU permits in Maryland — what you need to know
🏠 Maryland ADU-friendly status: Partial — improving
Maryland passed HB 22 in 2023 requiring most counties to allow ADUs by right. Montgomery County has a robust ADU program. Baltimore City allows accessory apartments in many zones. Prince George's County updated ADU rules in 2022.
Find a licensed Maryland contractor
Maryland requires licensed professionals for most permitted work. Always verify a contractor's license before hiring — it protects you and is required for most permit types.
General Contractors
Find pre-screened general contractors for your Maryland home project. Compare quotes on permitted work.
Find a Contractor →Verify MHIC License
Verify your contractor holds a valid Maryland Home Improvement Commission (MHIC) license before any permitted work begins.
Verify MHIC License →Electricians & Plumbers
Specialty-licensed electricians and plumbers are required for all permitted electrical and plumbing work in Maryland.
Learn More →Ready to get started? Browse verified, licensed contractors serving Maryland homeowners and get free quotes on your project.
🔍 Find a Contractor Near YouFrequently asked questions — Maryland permits
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