Harford County, MD Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Zoning control
- Lot area and yards, Section 267-55
- Critical Area LDA
- 15% lot coverage cap
- Large lots
- 50% impervious limit
- Also triggers
- Stormwater and afforestation
Summary
Harford County controls how much of a lot may be built on through minimum lot area and yards in Section 267-55. Near tidal water, the Chesapeake Bay Critical Area caps lot coverage at 15% in Limited Development Areas, the county's sharpest coverage limit.
Minimum lot area, area per dwelling or family unit, building setback from adjacent residential lot lines, lot width, front, side and rear yard and maximum building height, as displayed in Tables 55-1 through 55-4.3, shall apply, subject to other requirements of this Part 1.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4988582; v46 updated 2026-06-09; through 06-09-2026).
Full Breakdown
Harford's home-rule zoning sets intensity of use in the R1, R2, and R3 districts mainly through minimum lot area, lot width, and required yards under Section 267-55, rather than a single blanket coverage percentage. The hard number comes near the shore: within the Chesapeake Bay Critical Area, the 1,000-foot band landward of tidal waters and wetlands along the Bush, Gunpowder, and Susquehanna and the Chesapeake shoreline at Havre de Grace and Aberdeen, lot coverage in a Limited Development Area is capped at 15% of the site. Existing residential lots over half an acre in the Critical Area may not exceed 50% impervious. These limits trigger stormwater management and, for unforested sites, a 15% afforestation requirement.
Violations & Fines
Planning and Zoning enforces coverage and Critical Area limits during site-plan and building-permit review; over-covering a Critical Area lot blocks approval and can require removal of impervious surface. Relief requires a variance and Critical Area mitigation.
Frequently Asked Questions
Does Harford County limit lot coverage?
What is the 15% rule?
Sources & Official References
Other rules in Harford County
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