Maryland permits
Do you need a permit in Maryland?
Maryland enforces the Maryland Building Performance Standards (based on the IRC) statewide, with county and municipal enforcement. Maryland requires a Home Improvement Commission (MHIC) license for any contractor doing residential improvement work — one of the stronger licensing regimes in the country. Electrical and plumbing require separate state licensing.
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These are statewide ranges. Get your exact Maryland cost for your zip code and project size.
Can a homeowner pull the permit?
Yes, in most cases. Owner-occupied primary residences. Homeowner self-performing is exempt from MHIC licensing; any hired contractor must hold an MHIC license.
Where to file: County or city permits office. Montgomery, Prince George's, Baltimore County, and Baltimore City have online portals. Plan review 2-4 weeks in the DC-suburb counties; faster elsewhere. Chesapeake Bay Critical Area projects get additional environmental review.
Permits by trade in Maryland
| Trade | When required | Citation | Typical fee | DIY? |
|---|---|---|---|---|
| Plumbing | In-wall work, fixture changes, water heater, gas | MD Plumbing Code; state licensing | $75-$300 | No |
| Electrical | New circuits, panel work, service upgrades, EV charger | MD Electrical Code; NEC | $75-$300 | Conditional |
| Mechanical (HVAC) | Heat pump install, ductwork, refrigerant | MD Mechanical Code | $100-$300 | No |
| Building (structural) | Additions, structural modifications, decks | MD Building Performance Standards | $150-$1,000 | Yes |
| Roofing | Re-roofs, structural deck repair | Local jurisdiction | $75-$300 | Yes |
| Lead paint (pre-1978) | Disturbing painted surfaces in pre-1978 housing | MD Reduction of Lead Risk in Housing Act | $300-$1,500 | No |
Hover a Conditional or No entry for the homeowner rule. Always confirm with your local building department, since requirements vary by jurisdiction.
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