San Jose, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- 1,200-2,500 sq ft lots
- 75% max coverage
- 2,501-9,000 sq ft lots
- 65% max coverage
- Over 9,000 sq ft lots
- 60% max coverage
- Companion Floor Area Ratio cap
- 0.65 for these lots
- Scope
- SB9 splits & R-2 two-unit only
Summary
San Jose caps building footprint at 75% of lot area on small state-mandated SB9 split lots, sliding down to 65% and then 60% as lot size grows, but this numeric lot-coverage table applies only to Senate Bill 9 urban lot splits and streamlined two-unit projects, not to an ordinary single-family lot.
C. Floor Area Ratio and Lot Coverage. 1. ...the maximum Floor Area Ratio for each lot shall be 0.65... 2. The maximum lot coverage, calculated in accordance with Section 20.200.675 of this Code, shall not exceed the below requirements: Lot Size (sq ft) / Maximum Lot Coverage — 1,200 - 2,500 / 75%; 2,501 - 9,000 / 65%; Greater than 9,000 / 60%.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 5 Update 3).
Full Breakdown
Under the Senate Bill 9 implementation standards (SJMC Part 8, Chapter 20.30) and the parallel streamlined two-unit standards for R-2 lots (Part 9), San Jose ties maximum lot coverage to lot size in three tiers: 75% for 1,200-2,500 sq ft lots, 65% for 2,501-9,000 sq ft, and 60% above 9,000 sq ft, alongside a 0.65 Floor Area Ratio cap. Notably, the base residential development-standards table for ordinary R-1/R-2 lots (Table 20-60, § 20.30.200) carries no lot-coverage line at all, a standard single-family remodel is instead regulated by Floor Area Ratio through San Jose's Single-Family House Permit program (§ 20.100.1030), triggered once FAR exceeds 0.45.
Violations & Fines
A design that exceeds the applicable percentage is rejected at plan check for the Urban Lot Split parcel map or the two-unit Ministerial Approval; the project cannot record or pull building permits until the footprint is reduced to fit the tier for its lot size.
Frequently Asked Questions
Does this lot-coverage percentage apply to my ordinary house?
How does San Jose measure lot coverage for these projects?
Sources & Official References
Other rules in San Jose
California rules heatmap·Compare San Jose to another location·View the California building setbacks & zoning overview
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Lot Coverage Limits in Nearby Cities
How other cities in Santa Clara County handle lot coverage limits.