Knolls At Green Valley (Kn126)

How does Knolls At Green Valley (Kn126) 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. Knolls At Green Valley (Kn126)'s ENERGY STAR score of 50 compares with an average of 82 across the 9,612 that report a score; it scores higher than 10% of them and lower than 90%. Its site EUI of 65.2 kBtu/ft² is about 90% above the average of 34.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 4.4 kgCO₂e/ft² is about twice the group average of 2.1 kgCO₂e/ft².

At 160,528 sq ft, it is roughly in line with the average floor area of 150,919 sq ft for those buildings. It was built in 2005, 17 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 Knolls At Green Valley (Kn126)'s energy performance changed over time?

BuildingCensus holds 4 California disclosures for Knolls At Green Valley (Kn126), covering report years 2019, 2021, 2022, 2023. Its ENERGY STAR score went from 66 in 2019 to 50 in 2023 (-16 points); its best year on file was 2021, at 69. Site EUI moved from 54.7 kBtu/ft² (2019) to 65.2 kBtu/ft² (2023), an 19% increase. Reported emissions went from 588 tCO₂e to 703 tCO₂e over the same span (up 19%).

What does an ENERGY STAR score of 50 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 50 means the building performs better than about 50% of its national peers. BuildingCensus bands the score into report-card grades; 50 falls in band D — lowest band (1–54). It sits 25 points below 75, the threshold for ENERGY STAR certification. 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. Knolls At Green Valley (Kn126)'s 65.2 kBtu/ft² across 160,528 sq ft works out to about 10.5 billion Btu (3,067 MWh-equivalent) in 2023. The disclosure also reports 1,065,837 kWh of electricity for the year.

Which law requires Knolls At Green Valley (Kn126) to report its energy use?

Knolls At Green Valley (Kn126) 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 2023 disclosure (source record california:6833375:2023). 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.