Decatur, GA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Applies to
- legacy R-50/R-60 lots under district minimum
- Smallest lots, under 3,000 SF
- 69% max coverage
- Largest lots, 9,000+ SF
- 40% max coverage
- Civic building lots
- 50% max coverage
- Penalty
- up to $1,000 fine or 6 months jail
Summary
Decatur, Georgia's Unified Development Ordinance limits how much of a lot a house can cover. For a legacy lot of record in the R-50 or R-60 single-family districts that is smaller than the district's current minimum lot area, Section 2.1.4 sets a sliding cap running from 69% on lots under 3,000 square feet down to 40% on lots of 9,000 square feet or more.
2.1.4. - Lot Coverage A.Where a lot of record in R-50 or R-60 at the time of the effective date of this UDO had less than the required minimum lot area, the maximum lot coverage is as follows:
Less than 3,000 SF 69% max 3,000 SF to 3,499 SF 67% max 3,500 SF to 3,999 SF 65% max 4,000 SF to 4,499 SF 63% max 4,500 SF to 4,999 SF 60% max 5,000 to 5,499 SF 58% max 5,500 to 5,999 SF 56% max 6,000 to 6,499 SF 54% max 6,500 to 6,999 SF 52% max 7,000 to 7,499 SF 50% max 7,500 to 7,999 SF 47% max 8,000 to 8,499 SF 45% max 8,500 to 8,999 SF 43% max
9,000 SF or more 40% max ... The lot coverage of properties developed with existing single-family dwellings where the existing lot coverage exceeds the maximum lot coverage permitted may be modified as long as the proposed lot coverage does not exceed the existing lot coverage.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 28).
Full Breakdown
4 of the Decatur Unified Development Ordinance applies to a lot of record in the R-50 or R-60 Single-Family Residential Districts that was platted with less area than the district's minimum lot size in effect today (9,000 square feet in R-60, 5,000 in R-50). Rather than holding every legacy lot to the same flat percentage as a full-size lot, the section steps the maximum coverage down in 500-square-foot bands: 69% under 3,000 square feet, 67% from 3,000 to 3,499, easing down through the 50s and 40s percent as lot size grows, to a 40% floor on lots of 9,000 square feet or more.
3) applies the identical declining schedule down to its own 5,000-square-foot minimum. Civic-building lots in both districts get their own, separate 50% cap. 4 also carries a grandfathering rule: a property with an existing single-family dwelling whose footprint already exceeds the maximum lot coverage permitted for its lot may still be renovated, so long as the renovated coverage does not exceed what already exists on the ground. 1) reviews site and building permit applications against these coverage limits before construction is authorized.
Violations & Fines
UDO Section 11.4.2 makes exceeding a lot's maximum coverage a misdemeanor, punished under Section 11.4.5 by the citywide general penalty, Code Section 1-12: a fine up to $1,000, imprisonment up to six months, or both, with each day of a continuing violation counted separately. Section 11.4.3 also lets the UDO Administrator, city attorney, or an affected neighboring property owner seek an injunction to stop or correct an overbuilt structure.
Frequently Asked Questions
What is the maximum lot coverage for a house in Decatur, Georgia?
Why does Decatur use a sliding lot coverage scale instead of one flat number?
Can an existing house that already exceeds the lot coverage limit be renovated in Decatur?
Sources & Official References
Other rules in Decatur
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