Westminster, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- R1/R2/R3 lot coverage
- 40% (R1 excludes up to 600 SF covered parking)
- R4 lot coverage
- 50%
- R5 lot coverage
- 60%
- Governing table
- Table 2-3, § 17.210.015
- R1 minimum lot size
- 6,500 SF corner / 6,000 SF other
Summary
Westminster caps how much of a residential lot a home and its structures can cover under Table 2-3 of the zoning code. The limit runs from 40% in the R1, R2 and R3 districts up to 50% in R4 and 60% in R5, with covered parking spaces up to 600 square feet excluded from the R1 calculation.
Table 2-3 Residential Zoning District Development Standards Development Feature Requirements by Zoning District R1 R2 R3 R4 R5
...
Maximum lot coverage 40%7 40% 40% 50% 60%
... 7 Any required covered or enclosed parking spaces (up to a maximum of 600 square feet), including children's play houses, shall be exempt from lot coverage criteria.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4982734; v10 updated 2026-06-10).
Full Breakdown
015 sets the development standards for every residential zoning district in the WMC-3, and Table 2-3 (Residential Zoning District Development Standards) is where the numbers live. The row labeled "Maximum lot coverage" runs across five columns for the R1, R2, R3, R4 and R5 districts, and reads 40%, 40%, 40%, 50% and 60% in that order. R1 carries footnote 7, which exempts required covered or enclosed parking spaces, up to a maximum of 600 square feet, including children's play houses, from the lot coverage calculation, so a garage within that size does not count against the 40% cap in the single-family district.
The same table governs minimum lot size (6,500 SF for corner lots and 6,000 SF for other lots in R1, rising to 10,000 SF in R5), building height, and the front, side and rear yard setbacks that interact with coverage on a given parcel. Anyone platting an addition, a detached accessory structure or a new dwelling has to run the footprint against this table before the Planning Division will sign off, because the coverage percentage is checked at the same stage as the setback and height standards in Article 3 of Title 17. 015(A).
Violations & Fines
Exceeding the coverage percentage in Table 2-3 without an approved variance or a qualifying exemption (such as the R1 parking exclusion) means the Planning Division can withhold or revoke a building permit and require the excess area to be removed as an unpermitted structure. Because coverage is checked alongside setbacks and height at plan review, a project that clears the coverage cap but violates an adjoining standard in the same table faces the same permit hold until the plans are revised.
Frequently Asked Questions
What is the maximum lot coverage for a Westminster single-family home?
Does the lot coverage limit change by zoning district?
Who enforces the lot coverage standard in Westminster?
Sources & Official References
Other rules in Westminster
California rules heatmap·Compare Westminster to another location·View the California building setbacks & zoning overview
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Lot Coverage Limits in Nearby Cities
How other cities in Orange County handle lot coverage limits.