3301 C Street

How does 3301 C Street compare with other office buildings in California?

The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 3301 C Street's ENERGY STAR score of 83 compares with an average of 75 across the 4,912 that report a score; it scores higher than 48% of them and lower than 50%. Its site EUI of 50.1 kBtu/ft² is about 11% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.3 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².

At 404,327 sq ft, it is about 166% above the average floor area of 151,937 sq ft for those buildings. It was built in 1926, 59 years earlier than the group's average year built (1985). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².

How has 3301 C Street's energy performance changed over time?

BuildingCensus holds 6 California disclosures for 3301 C Street, covering report years 2018, 2019, 2020, 2021, 2023, 2024. Its ENERGY STAR score went from 98 in 2018 to 83 in 2024 (-15 points); its best year on file was 2018, at 98. Site EUI moved from 32.5 kBtu/ft² (2018) to 50.1 kBtu/ft² (2024), an 54% increase. Reported emissions went from 805 tCO₂e to 1,332 tCO₂e over the same span (up 65%).

What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 falls in band B — above median (70–84). 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. 3301 C Street's 50.1 kBtu/ft² across 404,327 sq ft works out to about 20.3 billion Btu (5,937 MWh-equivalent) in 2024. The disclosure also reports 4,459,419 kWh of electricity and 60,735 therms of natural gas for the year.

Which law requires 3301 C Street to report its energy use?

3301 C Street 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:6876241:2024). 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.