Nine Stories by the Trolley Stop: SB 79 Is Now the Law
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Senate Bill 79 took effect July 1st, immediately requiring cities to approve higher-density residential construction — up to nine stories — within a half-mile of qualifying transit stops. In San Diego, that mandate covers 48 trolley stations and qualifying Bus Rapid Transit stops, and unlike earlier planning frameworks, it strips away the council discretion and neighborhood opposition mechanisms that historically slowed or killed development projects for years.
The city had been working since May on a locally tailored implementation plan that includes carve-outs for very high fire severity zones, low-resource areas, historic sites, and areas subject to sea level rise risk. That phased plan, however, is still being drafted and must clear both the Planning Commission and City Council — a review expected sometime within the next year. In the interim, immediate approval is already required in non-phased areas, meaning projects near Mission Valley's trolley corridor, Downtown stations, and parts of North Park could advance quickly.
The economic backdrop underscores the stakes. San Diego's multifamily vacancy rate hit a 15-year high of 4.8% in the first quarter of 2026, with analysts projecting it will climb to 5.1% by year's end as 5,900 new units reach the market. Meanwhile, the median list price stood at $1,325,000 as of June 30th, with Redfin reporting average home sale prices at $969,000 — a 3.1% month-over-month decline. SB 79 does not solve the immediate demand-supply mismatch, but it removes regulatory barriers for construction in locations where housing economists broadly agree new density makes the most sense.
A critical nuance the law's proponents sometimes elide: SB 79 does not mandate affordability requirements beyond existing state and local rules. It is primarily a by-right approval mechanism for market-rate and mixed-income projects, meaning the degree to which it benefits cost-burdened lower-income residents depends heavily on implementation choices that have not yet been made — and on a City Council currently on legislative recess through the holiday.