What is the Atlanta R-3 zoning?

Atlanta's Zoning Ordinance creates R-1 through R-5 single-family residential districts plus higher-density R-G and R-LC zones. R-3 is a middle-density single-family district covering much of intown Atlanta.

R-3 dimensional standards:

• Minimum lot size: 9,000 sqft.
• Minimum lot width at building line: 85 feet.
• Minimum front yard setback: 50 feet.
• Minimum side yard setback: 10 feet.
• Minimum rear yard setback: 40 feet.
• Maximum lot coverage: 50% (building footprint).
• Maximum building height: 35 feet.

Compared to other Atlanta residential zones:

• R-1 — largest lots, lowest density (18,000 sqft minimum).
• R-2 — 12,000 sqft minimum.
• R-3 — 9,000 sqft minimum (covers much of intown Atlanta).
• R-4 — 7,200 sqft minimum (more compact single-family).
• R-4A/R-4B — subsets allowing narrower lots.
• R-5 — 4,000 sqft minimum (smallest single-family, historic neighborhoods).

Atlanta 2022 ADU reform:

The city passed an ADU reform package allowing Accessory Dwelling Units in most residential zones, including R-3, as permitted by right. Standards include:

• Maximum ADU size: 750 sqft or 50% of primary residence, whichever less.
• Setback requirements similar to primary structure.
• No separate entrance facing a public street in R-3.
• No short-term rental of ADU (long-term only).
• Owner-occupancy preferred but not strictly required.

Common R-3 remodel questions:

• Addition beyond setback — requires variance through Board of Zoning Adjustment.
• Garage conversion to ADU — allowed if it meets ADU standards.
• Detached ADU in rear yard — allowed with setback compliance.
• Second story addition — allowed up to 35-foot height limit.

Atlanta neighborhood overlays:

• Beyond base zoning, many Atlanta neighborhoods have overlay zoning or historic district designation.
• Atlanta Urban Design Commission — reviews work in designated historic districts (Inman Park, Grant Park, West End, others).
• Beltline Overlay — specific standards for properties near the Atlanta Beltline corridor.
• Neighborhood overlays — various neighborhoods have additional design standards.

Permit process:

• Office of Buildings handles most residential permits.
• Online submission via the Land Use Portal.
• Residential remodel plan review: 4-8 weeks.
• Additions: 6-12 weeks.
• Historic district review: add 4-8 weeks.

Development impact fees:

• Atlanta charges impact fees for new dwelling units (ADUs included).
• $1,000-$3,000 typical depending on zone.

Water and sewer capacity:

• New ADUs may require water/sewer capacity review and potentially sewer tap fees.

AskBaily's Atlanta contractor pool is familiar with R-1 through R-5 standards, the 2022 ADU reform, and UDC historic review. See /atlanta for deeper local context.