79 SB 79 Palo Alto

California Senate Bill 79 · operative July 1, 2026

More homes, near transit. What SB 79 does — and what it means for Palo Alto.

SB 79 sets state floors for how tall and dense housing can be within a half-mile of major train and rapid-transit stops. Palo Alto has three Caltrain stations in scope. The state floors apply by default starting July 1, 2026.

Learn the law See what changes in Palo Alto

SB 79 in one breath

A 2025 state law (Sen. Scott Wiener; signed by Gov. Newsom Oct 10, 2025) that sets minimum heights and densities for housing near major transit. Cities can't zone below those floors near a qualifying stop. The University Avenue, California Avenue, and San Antonio Caltrain stations are all in scope.

A 7-story apartment building next to the University Avenue Caltrain station becomes legal by right — even though Palo Alto's downtown zoning caps buildings at 50 ft today. All three Palo Alto Caltrain stations are Tier 1 (104, 90, 90 trains/weekday — we did the math). State floors take effect July 1, 2026.

Learn the law

Tiers, distances, the height and density floors, what ministerial approval really means, and the full timeline.

What it means for Palo Alto

Three Caltrain stations, the affected streets, ~2,700 projected new homes over 25 years, and the projects already in motion.

Tier analysis

How we computed each PA Caltrain station's SB 79 tier from public GTFS data. Verdict: all three are Tier 1.

Sharper FAQ

How tier is decided, what happens if Palo Alto refuses, who actually approves a project, and 13 more.

Why this site exists

A Palo Alto resident built this to actually understand SB 79 — and to help neighbors do the same. Phase one is a learning portal. Over time it'll grow into ongoing coverage of how the law plays out, parcel by parcel.

Educational, not legal advice. Every claim links to a source.