Placentia, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)

Section 23.12.060 has two limits for R-1: building coverage of not more than 50 percent of the net lot area, and a minimum dwelling floor area of 1,300 square feet exclusive of garages and patios. Both sit under the heading of lot coverage, so a house that satisfies the coverage cap can still fail on minimum size.

Undersized lots get relief in § 23.12.090. For initial construction, including move-on houses, on an existing, legally subdivided lot smaller than the required lot size in Section 22.16.020, the planning commission can approve a minimum dwelling unit size of 1,000 square feet, along with other modified standards.

The other residential districts print their own figures. R-A allows 40 percent for buildings or structures (§ 23.10.060). R-2 allows 50 percent (§ 23.15.060). R-G (§ 23.18.060) and R-3 (§ 23.21.060) measure differently: not more than 60 percent of the total lot area can be devoted to main and accessory building area, parking area, driveways and covered patios, and the remaining 40 percent goes to landscaping, lawn, outdoor recreation facilities such as swimming pools, tennis courts and putting greens, walkways and fences. R-3 excludes lattice patio covers from the covered patio count and includes oil well enclosures. In R-G and R-3 the formula counts paving, because parking areas and driveways sit inside the 60 percent.

R-3 adds an open area rule in § 23.21.120: not less than 200 square feet of open area per family unit on-site, which includes landscaped areas, walkways, recreation areas, and private patios and balconies exceeding 50 square feet, but excludes structures, driveways and parking areas.

Developments approved under the optional design and improvement standards of Title 22 take their building sites, coverage and yards from the approved plan (§ 23.12.110).