SB 79 Just Changed the Rules: What Bay Area Commercial Property Owners Need to Know

If you own commercial property in the Bay Area — or you are considering investing in it — there is a law that took effect this month that you need to understand.

Not eventually. Now.

California’s SB 79 went live on July 1, 2026, and it is one of the most significant pieces of legislation affecting commercial real estate in this state in years. It changes what can be built on commercially-zoned land near transit. It changes the calculus on whether to hold or sell. And for investors and property owners who understand it early, it creates opportunities that did not exist six months ago.

Let me walk you through what it actually means.

At its core, SB 79 is a transit-oriented development law. It allows high-density residential development to be built by-right on sites zoned for commercial, residential, or mixed use that are located near qualifying transit stops — without needing to go through a lengthy discretionary approval process.

The density numbers are significant. The law permits up to 80 units per acre and six stories for sites within a half mile of a transit stop. For sites directly adjacent to a transit station, that number jumps to 160 units per acre and nine stories.

By-right approval is the key phrase here. It means a qualifying project does not need to go through the typical public hearing and discretionary review process that has historically made development in California slow and expensive. If a project meets the criteria, it gets approved. That removes one of the biggest friction points in California real estate development.

SB 79 applies to “urban transit counties” — those with 15 or more passenger rail stations. In the Bay Area, that means Alameda, San Francisco, San Mateo, and Santa Clara counties. If your property is in one of these counties and it sits near a qualifying transit stop, this law applies to you.

The Association of Bay Area Governments has been tracking implementation closely, and as local jurisdictions work through their own planning processes, the practical application will vary by city. Some municipalities have the ability to adopt their own local transit-oriented development plans as alternatives, provided they deliver equivalent housing capacity. But the state-level floor is now firmly established.

This is where it gets interesting — and where I want to be direct with you.

If you own a commercial parcel near transit in one of these counties, your land just became more valuable to a different category of buyer than it was before. Residential developers, mixed-use developers, and investors assembling sites for transit-oriented projects are actively looking for exactly the kind of parcels that SB 79 has unlocked. Commercial sites with large parking lots, aging structures, or excess land are particularly attractive because they offer the footprint that density requires.

This does not mean you should sell. But it does mean you should understand your options with new clarity.

The hold-versus-sell decision for commercial property owners near transit is now a materially different conversation than it was a year ago. If your property is underperforming as a commercial asset — struggling to attract tenants, carrying deferred maintenance, sitting in a corridor where retail or office demand has softened — the residential development play that SB 79 enables may represent significantly more value than continuing to operate it as commercial.

On the other hand, if your property is performing well, the same increased land value that makes it attractive to developers also strengthens your position as an owner. You have optionality. That is worth something.

For investors who are not yet in the market but are watching, SB 79 creates a specific and time-sensitive opportunity: finding commercial parcels near transit that are undervalued as commercial assets but have not yet been repriced to reflect their new residential development potential.

Those windows close quickly once the market fully absorbs the implications of a law. We are in the early months of SB 79’s implementation. The investors who move thoughtfully and quickly in this environment will look very prescient in three to five years.

The submarkets I am watching most closely are the BART and Caltrain corridors in Alameda and Santa Clara counties — areas where transit infrastructure is mature, housing demand is structural, and commercial land near stations has historically been underutilized.

I want to be honest about something: SB 79 is not simple. Local jurisdictions have some flexibility in implementation. Environmental review requirements still apply in certain circumstances. Affordable housing components are part of the picture. And the interaction between SB 79 and existing zoning, general plans, and specific plans varies by location.

This is not a law you want to navigate without good counsel — both legal and advisory. What I can tell you is that the fundamental direction is clear: California is committed to building more housing near transit, and it is removing the barriers that have historically prevented that from happening.

That shift is real, it is durable, and it has direct implications for the value and highest-and-best-use of commercial land throughout the Bay Area.

SB 79 is not a threat to commercial real estate owners — it is a data point. A significant one. It changes the conversation about what your property is worth, who might want to buy it, and what can be built on it.

The owners and investors who will benefit most from this shift are the ones who understand it clearly, engage with it strategically, and make decisions based on the actual landscape rather than the one they knew two years ago.

If you own commercial property near transit in the Bay Area, or if you are looking to invest in this space, I would love to walk through what SB 79 means for your specific situation. These conversations are always worth having sooner rather than later.

Sources: California HCD, “SB 79 Transit-Oriented Development”; Holland & Knight, “California Gov. Gavin Newsom Signs SB 79”; Berliner Cohen LLP, “Commercial Property Owners: Get Ready for SB 79”; Association of Bay Area Governments, “Senate Bill 79 (2025)”; National Law Review, “SB 79 — Major Changes to Transit-Oriented Development in California.”