Cobb Zoning Ord. §134 caps residential structures at 35 ft / 2.5 stories (R-15, R-20, R-30, R-40, R-80). Commercial/industrial districts 45–60 ft. Cumberland CID towers can exceed 150 ft. Dobbins ARB Part 77 surfaces impose FAA height review.
Cobb County Zoning Ordinance §134 limits residential building height to 35 feet or 2.5 stories, measured from average finished grade to midpoint of sloped roof (flat roof = top of parapet). Chimneys, antennas, cupolas, and mechanical equipment are permitted up to an additional 10 feet. General Commercial (GC) allows 45 ft; Neighborhood Retail (NRC) 35 ft; Office (OS) 45 ft; Office-Industrial (OI) 45 ft; Light Industrial (LI) 60 ft. The Cumberland CID and Town Center CID zoning districts allow mid-rise and high-rise up to 150+ ft for mixed-use development. Any structure over 200 ft above ground level (or within 20,000 ft of Dobbins ARB primary/transitional surface) requires FAA Form 7460-1 notice of construction. Dobbins' Part 77 imaginary surfaces cover much of Marietta and adjacent areas, affecting cranes and tall buildings.
Exceeding height limit: stop-work, correction or variance required, $250–$2,500 fine. FAA 7460-1 omission: FAA enforcement + construction halt.
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See how Marietta's structure height limits rules stack up against other locations.
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