Baltimore County does not use a single flat lot-coverage percentage. In Density Residential (D.R.) zones, development is controlled mainly by maximum gross density (dwelling units per acre) and open-space standards set in the BCZR tables and the county's Comprehensive Manual of Development Policies.
Rather than a fixed lot-coverage cap, BCZR §1B01.2 controls D.R.-zone development through maximum gross residential density (dwelling or density units per acre, e.g. up to about 16 units/acre in D.R.16) together with building-length, building-separation, and open-space standards, many detailed in the Comprehensive Manual of Development Policies (CMDP) under §504.2. Minimum lot area, width, and required open space effectively govern how much of a lot can be built on. Because the applicable density, coverage-related, and open-space figures vary by exact zone and by the CMDP, owners should confirm their parcel's zone and check the specific table. Impervious-surface limits may also apply through the county's stormwater and environmental rules.
Exceeding permitted density or falling short of required open space is a zoning/subdivision violation reviewed by Permits, Approvals and Inspections during plan review; noncompliant plans are denied or must be revised.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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Home backyard composting is allowed in Baltimore County and supported through the Bureau of Solid Waste Management. The county collects yard trim (leaves, gr...
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Baltimore County has no ordinance banning residential artificial turf. Installation is governed by general zoning, lot-coverage, and stormwater rules, since ...
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Native and pollinator plantings are permitted in Baltimore County and encouraged for Bay-friendly landscaping, but tall native beds must still respect the 8-...
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Rain barrels and rainwater harvesting are legal in Baltimore County and encouraged as stormwater best-management practices. Maryland has no statute banning r...
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Maryland has no year-round mandatory watering ban; restrictions follow drought conditions set by the Maryland Department of the Environment (MDE). As of 2026...
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Baltimore County's weed ordinance (Code 13-7-401) bars grass, weeds, or other rank vegetation over 8 inches tall. Noxious weeds are separately regulated stat...
See how Baltimore County's lot coverage limits rules stack up against other locations.
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