Single-family RS and R-5000 districts in Union City cap lot coverage at 50%, while multi-family RM districts limit coverage to 40%. In the R-5000 district, one-story structures may cover up to 60%.
Per the Union City Residential Zoning Districts Development Standards (UCMC Title 18), maximum lot coverage is 50% in the RS 6,000, RS 4,500, and R-5000 single-family districts and 40% in the RM 3,500, RM 2,500, and RM 1,500 multi-family districts. In the R-5000 district, one-story structures may cover up to 60% of the lot, but two-story structures are limited to 50% coverage. Minimum lot areas range from 4,500 square feet (RS 4,500) to 7,000 square feet (RM 3,500), and corner lots must be at least 10% larger than the minimum. Multi-family districts also require 300 square feet of usable open space.
Development exceeding the district's coverage limit must be reduced or obtain a variance. The Zoning Ordinance controls over the summary table in case of conflict.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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Union City does not restrict backyard composting, and its Water Efficient Landscape ordinance (UCMC 18.112) requires compost in permitted landscape installat...
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Union City has no ordinance banning artificial turf on private property, and California Civil Code 4735 voids HOA rules prohibiting synthetic grass. For perm...
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Union City's Water Efficient Landscape ordinance (UCMC Chapter 18.112) implements California's MWELO. New landscapes of 500+ sq ft and rehab projects of 2,50...
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Union City does not prohibit residential rainwater capture. California's Rainwater Capture Act allows rooftop collection without a water right, and the City'...
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Union City's water purveyor is the Alameda County Water District (ACWD), serving the Tri-City area. ACWD enforces permanent water-waste prohibitions year-rou...
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All weeds on streets, sidewalks, and private property in Union City are declared a public nuisance under UCMC Chapter 7.08. The Fire Chief gives a ten-day no...
Side-by-side rule comparisons with other cities in Alameda County.
See how other cities in Alameda County handle lot coverage limits.
See how Union City's lot coverage limits rules stack up against other locations.
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