The Hudson Apartments, A Greystar Elan Community

How does The Hudson Apartments, A Greystar Elan Community 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. The Hudson Apartments, A Greystar Elan Community's ENERGY STAR score of 99 compares with an average of 82 across the 9,612 that report a score; it scores higher than 71% of them and lower than 24%. Its site EUI of 27.4 kBtu/ft² is about 20% 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 1.6 kgCO₂e/ft² is about 24% below the group average of 2.1 kgCO₂e/ft².

At 145,562 sq ft, it is roughly in line with the average floor area of 150,919 sq ft for those buildings. It was built in 2016, 28 years later than 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 The Hudson Apartments, A Greystar Elan Community's energy performance changed over time?

BuildingCensus holds 2 California disclosures for The Hudson Apartments, A Greystar Elan Community, covering report years 2020–2021. Its ENERGY STAR score went from 35 in 2020 to 99 in 2021 (+64 points). Site EUI moved from 59.9 kBtu/ft² (2020) to 27.4 kBtu/ft² (2021), a 54% decrease. Reported emissions went from 507 tCO₂e to 228 tCO₂e over the same span (down 55%).

What does an ENERGY STAR score of 99 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 99 means the building performs better than about 99% of its national peers. BuildingCensus bands the score into report-card grades; 99 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. The Hudson Apartments, A Greystar Elan Community's 27.4 kBtu/ft² across 145,562 sq ft works out to about 4 billion Btu (1,169 MWh-equivalent) in 2021. The disclosure also reports 504,588 kWh of electricity and 23,340 therms of natural gas for the year.

Which law requires The Hudson Apartments, A Greystar Elan Community to report its energy use?

The Hudson Apartments, A Greystar Elan Community 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 2021 disclosure (source record california:15835911:2021). 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.