Every January, a new wave of California legislation reshapes the real estate landscape. For 2025, the changes are significant and far-reaching, touching everything from how homes are disclosed and insured to what you can build on your property. Here is what matters most for buyers and sellers on the SF Peninsula.
ADU Regulations Get Another Overhaul
California continues to push accessory dwelling units as a solution to the housing shortage. Starting in 2025, AB 1033 allows ADUs to be sold separately from the primary residence as condominiums in cities that opt in. This is a meaningful shift for homeowners in San Mateo and Santa Clara counties who have invested $200,000 to $400,000 building detached ADUs. The ability to sell that unit independently could dramatically change the ROI calculation.
Additionally, AB 976 makes the owner-occupancy exemption for ADUs permanent. If you built an ADU planning to rent it out while living in the main house, you no longer need to worry about that requirement sunsetting.
Enhanced Climate and Natural Hazard Disclosures
AB 1280 expands the Natural Hazard Disclosure statement to include more granular wildfire risk data. For properties in the hills of Los Altos, Woodside, and Portola Valley, this means buyers will receive more detailed information about fire severity zones and evacuation routes. Sellers should prepare for these conversations early and consider pre-sale mitigation measures like defensible space clearing and ember-resistant vent installation.
SB 1091 also requires sellers to disclose whether a property has been subject to an insurance non-renewal in the past five years. Given the current insurance crisis in California, this is directly relevant to Peninsula homeowners, particularly those in hillside communities.
HOA Transparency Requirements
SB 326 continues its rollout, requiring all condominium associations to complete structural inspections of balconies, elevated walkways, and load-bearing components. For buyers considering condos in Foster City, San Mateo, or Redwood City, request the inspection reports during your due diligence period. Deferred maintenance issues flagged in these reports could signal future special assessments.
Property Tax Transfer Changes
While Proposition 19 has been in effect since 2021, enforcement and interpretation continue to evolve. The 2025 updates clarify the timeline for filing base-year value transfers when purchasing a replacement property. If you are over 55 and considering downsizing from a larger home in Atherton to a condo in Burlingame, understanding the precise filing requirements is essential to preserving your property tax base.
What This Means for You
Legislation does not operate in a vacuum. Each of these changes interacts with local market conditions, interest rate environments, and personal financial circumstances. The ADU sale provisions could add significant value to properties with existing units. The disclosure requirements may slow some transactions but ultimately protect both parties.
My advice: do not wait until you are in the middle of a transaction to learn about these changes. Whether you are planning to buy, sell, or simply want to understand how new laws affect your property value, a proactive conversation now saves stress later.
I am happy to walk through how any of these changes apply to your specific situation. Reach out anytime.