255 Sonoma Way

How does 255 Sonoma Way compare with other multifamily housing buildings in California?

The latest disclosures cover 10,630 multifamily housing buildings in California, out of 40,029 buildings citywide. 255 Sonoma Way's ENERGY STAR score of 93 compares with an average of 82 across the 9,612 that report a score; it scores higher than 53% of them and lower than 45%. Its site EUI of 30.9 kBtu/ft² is about 10% below the average of 34.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.8 kgCO₂e/ft² is about 13% below the group average of 2.1 kgCO₂e/ft².

At 129,150 sq ft, it is about 14% below the average floor area of 150,919 sq ft for those buildings. Its 1987 construction date is close to the group's average year built (1988). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².

How has 255 Sonoma Way's energy performance changed over time?

BuildingCensus holds 5 California disclosures for 255 Sonoma Way, covering report years 2020–2024. Its ENERGY STAR score went from 89 in 2020 to 93 in 2024 (+4 points); its best year on file was 2022, at 93. Site EUI moved from 31.0 kBtu/ft² (2020) to 30.9 kBtu/ft² (2024), a 0% decrease. Reported emissions went from 244 tCO₂e to 236 tCO₂e over the same span (down 3%).

What does an ENERGY STAR score of 93 mean?

ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 93 means the building performs better than about 93% of its national peers. BuildingCensus bands the score into report-card grades; 93 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In California, 65% of scored buildings are at 75 or above.

Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 255 Sonoma Way's 30.9 kBtu/ft² across 129,150 sq ft works out to about 4 billion Btu (1,170 MWh-equivalent) in 2024. The disclosure also reports 594,076 kWh of electricity and 19,078 therms of natural gas for the year.

Which law requires 255 Sonoma Way to report its energy use?

255 Sonoma Way reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record california:15935975:2024). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.