Berkeley BESO in 2026: The Energy Score, Upgrade Credits and Closing Deposit Are Different

By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.

Berkeley’s home-sale energy requirements involve more than obtaining a score. For buyers and sellers, the most useful distinction is between the assessment describing the home, the upgrade standard to be satisfied and any deposit associated with deferring the work.

Keeping those three elements separate helps the transaction team choose a realistic preparation and closing sequence. It also prevents a seemingly reassuring number from standing in for the actual compliance pathway.

The 2026 requirement begins before listing

The City of Berkeley’s current BESO page identifies single-family homes and duplexes as subject to the new time-of-sale requirements from January 1, 2026. It places the equivalent upgrade phase for triplexes and fourplexes in January 2028 and distinguishes condominiums and ADUs.

The city requires a Home Energy Score report before an applicable building is listed. Confirm the exact property category and any approved exception rather than assuming every residential ownership form follows the same sequence.

The Home Energy Score and upgrade credits measure different things

The city’s compliance guide, updated July 2026, describes a Home Energy Score on a 1–10 scale and a separate Resilience Standard requiring six upgrade credits per unit. A score of 9 or 10 provides two credits, rather than automatically satisfying the entire standard.

That distinction changes how an attractive listing should be read. A high energy score can be useful information about the home while the transaction still needs a documented answer about the remaining requirement or an applicable exemption. The score report and a Certificate of Compliance serve different purposes.

The upgrade path should fit the actual building

The city offers a menu of measures rather than one identical project for every home. Appropriate selection depends on the existing systems, the work already documented and the owner’s future plans.

Before choosing equipment, establish what supporting work is required. A project can involve electrical capacity, placement, permits, access and coordination with other improvements. Obtain a proposal that identifies the complete scope and exclusions. A headline equipment price is not necessarily the installed project cost.

For a duplex, evaluate the relevant units and shared systems carefully. The plan should explain which spaces a measure serves and what evidence the city requires, rather than multiplying a single-house assumption across the building.

A deferred-work deposit is not the project budget

The city’s deferral route calls for a $5,000 deposit, split $2,500 each between buyer and seller, and gives the buyer two years from sale to complete the upgrades. The city holds the funds and describes the process for a refund after compliance.

The deposit amount does not establish that the chosen project will cost $5,000. For a hypothetical $8,000 installed project, a later $5,000 refund would not eliminate the need to plan the full construction payment and other applicable costs. That arithmetic illustrates a cash-timing question; it is not a quote for a Berkeley home.

Choose the pathway before the contract depends on it

A seller considering completion before sale should compare contractor availability and the documentation sequence with the intended launch. A buyer taking deferred work should understand the remaining scope, funding and deadline before relying on that arrangement.

Where an exemption may apply, seek the city’s confirmation and required evidence. The presence of a newer appliance or an informal statement that the home is efficient should not be treated as an approved exemption.

Our Berkeley sale-readiness guide connects energy requirements with the wider property file. This article focuses on the separate meanings of the score, credits and deposit.

Explore real estate and home for sale in Berkeley. Contact Diamond to coordinate the property and transaction questions with the city and qualified project professionals.

Sources checked October 28, 2026. Program requirements and exceptions are property-specific. The cost example is hypothetical and excludes other fees, financing and transaction costs.