Downey, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Governing section
- DMC § 9312.08, Tables 9.3.3 & 9.3.4
- R-1 max lot coverage
- 45% (all R-1 sub-zones)
- R-2/R-3/R-3-O max coverage
- 50%
- R-1 max FAR
- 0.45 (0.50 with solar bonus)
- Review process
- Site Plan Review, § 9820, for R-3/R-3-O
Summary
Downey caps how much of a residential lot a building can cover: 45% maximum in the R-1 single-family zone and 50% maximum in the R-2, R-3 and R-3-O multi-family zones. The limits sit in the property development standards tables for each zone and apply on top of separate setback and floor-area-ratio rules.
Table 9.3.3. R-1 Zone Property Development Standards ... Floor area ratio - maximum 0.45 ... Lot coverage - maximum 45% ... Table 9.3.4. R-2, R-3, R-3-O Zone Property Development Standards ... Lot coverage - maximum (percent) R-2 50 R-3 50 R-3-O 50
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4807734; v5 updated 2026-01-27).
Full Breakdown
08 sets the Residential Zones Property Development Standards through two tables. 3, covering the R-1 Zone across its five lot-size sub-zones (R-1-5,000 through R-1-10,000), lists 'Lot coverage - maximum' at 45% uniformly, regardless of which R-1 sub-zone the lot falls in. 50; the lot coverage cap itself does not carry that bonus. 4, covering the R-2, R-3, and R-3-O multi-family zones, lists 'Lot coverage - maximum (percent)' at 50 across all three zones. These lot coverage figures apply alongside, not instead of, the separate minimum setback requirements in the same tables (for example, a 20-foot front setback and 20-foot rear setback in R-1), so a project must satisfy both the coverage percentage and the setback envelope simultaneously.
Site Plan Review under § 9820 is required for construction in the R-3 and R-3-O zones and is where the City verifies compliance with these coverage figures before issuing building permits.
Violations & Fines
Building beyond the maximum lot coverage percentage for the zone is a zoning code violation that will be caught at plan check and can require the applicant to redesign the project before a building permit is issued. If discovered after construction, the City can require removal or reduction of the noncompliant structure and pursue standard municipal code enforcement remedies, including notice to correct and citation for continuing violations.
Frequently Asked Questions
What is the maximum lot coverage for a house in Downey?
Is lot coverage higher for multi-family properties?
Does adding solar panels increase my allowed lot coverage?
Sources & Official References
Other rules in Downey
California rules heatmap·Compare Downey to another location·View the California building setbacks & zoning overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Lot Coverage Limits in Nearby Cities
How other cities in Los Angeles County handle lot coverage limits.