Marietta, GA Building Setbacks & Zoning: Structure Height Limits (2026)
Key Facts
- R-1 max building height
- 40 ft.
- R-3/R-4 max building height
- 35 ft.
- Accessory structure height trigger
- Over 15 ft.
- Accessory structure side setback (tall)
- 10 ft.
- Accessory structure rear setback (tall)
- 30 ft. or equal to height
Summary
Marietta caps building height at 40 feet for a principal structure in the R-1 Single-Family Residential/Agriculture district under Section 708.01(H). Accessory structures over 15 feet tall trigger their own tighter setback under Section 708.01(F)(4): at least 10 feet from the side property line and 30 feet from the rear, or a distance equal to the structure's own height, whichever is smaller.
F.Accessory Structures. ... 4.Accessory structures greater than 15 feet in height, but less than 35 feet in height, must be set back at least 10 feet from the side property line, and must be set back from the rear property line a distance of 30 feet, or a distance equal to the height of the structure, whichever is less. ... H.Bulk and Area Regulations. ... Maximum Building Height: 40 ft.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 56).
Full Breakdown
02(H). 04(H). 01(F)(4), any accessory structure taller than 15 feet but under 35 feet has to sit back at least 10 feet from the side property line and 30 feet from the rear property line, or a distance equal to its own height, whichever turns out smaller, so a taller shed or detached garage effectively needs more room from the property line than a short one. 01(F)(1) applies to every accessory structure regardless of height. 01(C)(2)(e) caps an ADU's height at whatever the principal structure measures, so an ADU can never be taller than the house it sits behind, and once an ADU passes 15 feet it picks up its own 35-foot rear setback under (C)(2)(g), a larger buffer than the 30-foot figure that applies to an ordinary accessory structure.
Violations & Fines
A principal structure taller than 40 feet in Section 708.01(H), or an accessory structure over 15 feet that fails to meet the height-based side and rear setbacks in Section 708.01(F)(4), does not meet the R-1 Bulk and Area Regulations, and the Development Services Department can deny the building permit or require the structure to be shortened or relocated to come into compliance.
Frequently Asked Questions
How tall can a house be in Marietta's R-1 district?
Does a tall backyard shed need a bigger setback in Marietta?
Can my accessory dwelling unit be taller than my house in Marietta?
Sources & Official References
Other rules in Marietta
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Structure Height Limits in Nearby Cities
How other cities in Cobb County handle structure height limits.