Baltimore County, MD Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Primary control
- Density (units per acre)
- No flat coverage %
- Not a single fixed cap
- Open space
- Set by BCZR + CMDP
- D.R.16 density
- Up to ~16 units/acre
- Authority
- BCZR §1B01.2; CMDP §504.2
Summary
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.
The maximum gross residential densities and height of dwellings shall be as prescribed in the table below; provided, however, that higher or additional standards for the provision of other amenity open space, standards and methods for the inclusion and equitable apportionment of public amenity open space [apply].
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 29 | Zoning Regulations: Supplement 10).
Full Breakdown
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.
Violations & Fines
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.
Frequently Asked Questions
What percent of my lot can I cover?
Where do I find my zone's exact limits?
Sources & Official References
Other rules in Baltimore County
Compare Baltimore County to another location·View the Maryland building setbacks & zoning overview
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