Roswell, GA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- AG-43, RS-87, RS-30 cap
- 25% max building coverage
- RS-18 / RS-12 cap
- 30% / 35% max coverage
- RS-9 cap
- 45% max building coverage
- RS-6 / RS-4, R-CC, R-TH, RM cap
- 55% / 60% max coverage
- Excluded from the calculation
- parking, driveways, walkways, decks
- Relief path
- Variance via Board of Zoning Appeals
- Maximum fine
- $2,000 per day, per violation
Summary
Roswell's Unified Development Code caps building coverage, the ground-floor footprint of every principal and roofed accessory structure, at a set percentage of each residential lot. The ceiling starts at 25% in the large-lot AG-43, RS-87 and RS-30 districts and rises as lots shrink, reaching 60% in RS-4, R-CC, R-TH and RM-2/RM-3.
2.2.4. - Building Coverage Building coverage is the horizontal area measured within the outside of the exterior walls of the ground floor of all principal buildings and roofed accessory buildings on the lot, not including parking areas, driveways, walkways, steps, terraces and uncovered decks.
...AG-43 RS-87 RS-30 Coverage Ⓜ Building coverage (max) 25% 25% 25% ...RS-18 RS-12 Coverage Ⓜ Building coverage (max) 30% 35% ...RS-9 ...Ⓜ Building coverage (max) 45% ...RS-6 RS-4, R-CC, R-TH, RM-2, -3 ...Ⓜ Building coverage (max) 55% 60%
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 17 | Unified Development Code: Supplement 5).
Full Breakdown
4 defines building coverage as the horizontal area measured within the outside of the exterior walls of the ground floor of all principal buildings and roofed accessory buildings on the lot, and it expressly excludes parking areas, driveways, walkways, steps, terraces and uncovered decks from that calculation. The maximum percentage each lot may cover is set district-by-district in the Article 3 dimensional tables. 1 caps coverage at 25% in AG-43 (agricultural residential), RS-87 and RS-30 (single-family estate). 1 raises the ceiling to 30% in RS-18 and 35% in RS-12 (single-family suburban).
1 allows 55% in RS-6 and 60% in RS-4, Residential Cottage Court (R-CC), Residential Townhouse (R-TH) and Residential Multi-Family (RM-2, RM-3), the city's smallest-lot districts. The cap applies regardless of building type, detached house, carriage house, attached house, townhouse and the rest, and it stacks with the separate minimum lot area, setback and landscape open space figures printed in the same tables; a design can meet every setback and still be rejected for exceeding coverage. 11, heard by the Board of Zoning Appeals after a public hearing and granted only on findings of extraordinary hardship tied to the property's size, shape or topography, not to any action of the applicant, and only for the minimum relief that makes the project possible.
Board of Zoning Appeals decisions are final at the city level; the only further recourse is an appeal to Fulton County Superior Court within 30 calendar days of the decision.
Violations & Fines
A building that exceeds its district's coverage cap is handled under the UDC's general enforcement provision, § 13.14.4. The City can withhold a certificate of occupancy, issue a stop-work order, or suspend, revoke or modify the permit until the footprint is corrected. Unresolved violations carry a civil fine of up to $2,000 per day, with each day of noncompliance treated as a separate offense, imposed by the Roswell Municipal Court.
Frequently Asked Questions
What counts toward Roswell's building coverage limit?
What is the maximum building coverage on an RS-9 lot in Roswell?
Can a homeowner exceed the coverage cap in Roswell?
What happens if a building exceeds Roswell's coverage limit without a variance?
Sources & Official References
Other rules in Roswell
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Lot Coverage Limits in Nearby Cities
How other cities in Fulton County handle lot coverage limits.