Building Permits in Baltimore, MD
Check permit requirements for home improvement projects in Baltimore. Select a project type below to see local requirements, estimated fees, and how to apply.
Recent permit activity in Baltimore
We track 190,348 permit records from Baltimore's official open-data feed, updated today.
Thinking about a project? Check what permits have already been pulled on a property — data is current to today. Useful for buyers vetting a listing, or homeowners curious about their neighbors' renovations.
Key Exemptions in Baltimore
These projects typically don't require a building permit in Baltimore:
Small at-grade patio slabs under 120 square feet are typically exempt from building permits per IRC R105.2 (extended via local amendment). The slab must be at-grade (not more than 30 inches above adjacent grade) and not part of an accessible route.
Freestanding decks not more than 30 inches above grade are exempt from a building permit per Maryland Building Performance Standards (2018 IRC).
Replacing an existing driveway in the same footprint with no changes to the curb cut is generally exempt from permit requirements.
Replacing a light fixture or outlet in an existing location does not require a permit.
Plugging a Level 1 (120V) EV charger into an existing outlet is NOT considered new electrical work and does not require a permit. This is the only permit-free EV charging method, just plug in and charge. Adds approximately 4-5 miles of range per hour.
See all rules by selecting a project type below, or use our free lookup tool for a personalized answer.
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Baltimore Building Department
Nearby Cities in Maryland
Permit Guides
Read our in-depth guides for common home improvement projects: