New Rules

BESO Changes

Starting January 1, 2026, single family homes in Berkeley have a new layer of requirements under BESO . The rule now requires the seller to get an energy assessment at time of listing and adds what’s called a “Resilience Standard”. That means when a property is sold sellers will either need to complete upgrades from a menu of options or set aside a deposit/escrow and the buyer will be required to take them on.  

You can learn more about the specifics on their website: berkeleyca.gov/beso

Why this matters

If you’re selling your Berkeley home, you’ll want to plan ahead. These upgrades could affect timing, cost, and your negotiation strategy.

If you’re buying, you’ll want to check the assessment status and whether upgrades are part of the sale or defered to the buyer.

Because I grew up here and now help families navigate the local market, I know how even seemingly small rules can make a big difference in “what to expect”, especially if you’re juggling a family, move logistics, or budgeting for future upgrades.

Pro tip for listing or buying in 2026

Start early. If you’re planning to sell in 2026 or later, having the assessment done before you list gives you time to decide whether to do upgrades or negotiate differently. If you’re buying, ask your agent whether the seller has complied, and factor in the “what if” scenario if the buyer ends up being responsible.