Carrollton, TX Building Setbacks & Zoning: Lot Coverage Limits (2026)

Article 10 of the Comprehensive Zoning Ordinance, updated April 2026, governs the three Multi-Family Residential Districts: MF-12, MF-15 and MF-18 (the numbers denote maximum dwelling units per net acre). Section M, "Height and Area Regulations," sets item 6, "Maximum amount of impervious coverage (As a percentage of total lot area)," at 80% for every one of the three MF districts, meaning no more than eight-tenths of a multi-family lot's total area may be covered by buildings, paving, driveways or other impervious surface, regardless of which of the three density tiers the tract is zoned.

The same table pairs that cap with related dimensional standards read from the identical section: a 10,000-square-foot minimum lot area, density ceilings of 12, 15 and 18 dwelling units per net acre by district, minimum exterior brick or stone content of 75% of each wall (subject to Planning & Zoning Commission-approved alternate materials, appealable to City Council within ten days), and a maximum structure height of two stories, extended to three stories only where an enclosed garage occupies the ground floor. Minimum landscaped area is governed separately under Article 25.

Net acre for density purposes excludes rights-of-way and unreclaimed floodplain, with the Planning and Zoning Commission determining the degree of floodplain improvement needed to count toward the acreage/density calculation at site plan approval. These figures were last amended by Ordinance No. 3514 (09/11/12) and Ordinance No. 3943 (01/14/20) for the landscaping cross-reference.