AB 1957 is law: Chapter 279 of 2026, effective January 1, 2027. It rewrites who counts as an eligible bidder at a trustee's sale of a one to four unit residential property, and it hands enforcement officials a new civil penalty. Here is what changed and who it lands on.
Most California housing bills in 2026 were about what you can build or what you can charge. AB 1957 is narrower than that, and if you own one to four unit residential property it is also more expensive to ignore. It changes who is allowed to bid after a foreclosure auction, and it changes what happens to the people who run that process wrong.
The bill was chaptered on September 18, 2026 as Chapter 279. It takes effect January 1, 2027.
What the bill actually does
California already runs a specific procedure for the sale of a residential property with one to four units under a deed of trust. The trustee's sale is not final until the earliest of several time periods. During that window a defined group, called eligible bidders, can still submit bids.
Before this bill that group was three kinds of buyer: eligible tenant buyers, prospective owner-occupants, and qualifying nonprofit corporations with certain attributes.
AB 1957 changes the composition of that group. It removes prospective owner-occupants from the definition entirely.
Nobody who intends to move in and live in the property gets special standing at the post-auction stage anymore.
Two terms changed, one attribute added
The bill renames the eligible tenant buyer to eligible tenant bidder. Same role, new label, and the label now appears everywhere the old term did.
It also redefines the nonprofit piece. Qualifying nonprofit corporations are now termed eligible community bidders, and the bill adds one more attribute they have to satisfy to qualify.
If your notices or internal procedures still carry the old language, they will not match the statute as of January 1, 2027.
The new penalty
Enforcement is where this bill gets teeth. The Attorney General, a county counsel, a city attorney, and a district attorney could already bring an action to enforce the eligible bidder provisions. AB 1957 authorizes those same officials to seek a civil penalty.
That changes the consequence of getting bidder notifications and submission procedures wrong. It is no longer only about whether the sale was valid.
Who this lands on
Start with the obvious group: owners of one to four unit residential property in foreclosure. The pool of qualified bidders at the post-sale stage narrows, because the owner-occupant category is gone.
Then the servicers and trustees who run the process. Their notices and timelines have to match a rewritten definition of who is eligible, and the downside for non-compliance is now a penalty.
Then tenants. The eligible tenant bidder survives, renamed but intact. The tenant path to bid on the home they already live in stays open.
Then community organizations. Nonprofits that already qualified keep a path in as eligible community bidders, with one new attribute to satisfy.
What it does not do
It does not ban investor purchases at trustee's sales. It does not change the timeline. It does not change the substance of the one to four unit rule itself.
What it does is narrow the field and raise the compliance stakes on the people running the sale.
If you hold one to four unit property
Foreclosure is rare until it is not. The date that matters is January 1, 2027, and the work that matters is making sure whoever runs a sale for you is using the current definitions.
If you own in a portfolio, ask your servicer which version of the eligible bidder rules their notices carry. If a property is already in default, that question is worth asking before the sale is noticed, not after.
The bottom line
AB 1957 is a small bill with a narrow audience. One to four unit residential property in foreclosure, the servicer and trustee running the sale, the tenant who wants to bid, and the nonprofit that qualifies.
Everyone outside that group can skip it. Everyone inside it has until January 1, 2027 to change the paperwork.
Source: California Legislative Counsel's Digest, AB 1957 (Pacheco), Chapter 279, Statutes of 2026. https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260AB1957
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