21041 PARTHENIA ST

How does 21041 PARTHENIA ST compare with other multifamily housing buildings in Los Angeles?

The latest disclosures cover 3,538 multifamily housing buildings in Los Angeles, out of 11,498 buildings citywide. 21041 PARTHENIA ST's ENERGY STAR score of 67 compares with an average of 78 across the 3,344 that report a score; it scores higher than 24% of them and lower than 75%. Its site EUI of 40.4 kBtu/ft² is roughly in line with the average of 37.2 kBtu/ft².

At 181,930 sq ft, it is about 201% above the average floor area of 60,540 sq ft for those buildings. It was built in 1985, 10 years later than the group's average year built (1975). 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 21041 PARTHENIA ST's energy performance changed over time?

BuildingCensus holds 9 Los Angeles disclosures for 21041 PARTHENIA ST, covering report years 2017–2025. Its ENERGY STAR score went from 93 in 2018 to 67 in 2025 (-26 points); its best year on file was 2018, at 93. Site EUI moved from 24.3 kBtu/ft² (2017) to 40.4 kBtu/ft² (2025), an 66% increase. Reported emissions went from 202 tCO₂e to 405 tCO₂e over the same span (up 101%).

What does an ENERGY STAR score of 67 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 67 means the building performs better than about 67% of its national peers. BuildingCensus bands the score into report-card grades; 67 falls in band C — below median (55–69). It sits 8 points below 75, the threshold for ENERGY STAR certification. In Los Angeles, 63% 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. 21041 PARTHENIA ST's 40.4 kBtu/ft² across 181,930 sq ft works out to about 7.3 billion Btu (2,154 MWh-equivalent) in 2025. Its source EUI of 78.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 10,978 thousand gallons of water for the year.

Which law requires 21041 PARTHENIA ST to report its energy use?

21041 PARTHENIA ST reports under LA Municipal Code Div. 97, §91.9701 (EBEWE), the legal basis of Los Angeles's Existing Buildings Energy & Water Efficiency (EBEWE) program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record la:382743906275:2025). EBEWE requires annual benchmarking plus audits/retro-commissioning every five years for privately owned buildings of 20,000 sq ft or more; non-compliance carries a $202 fee (LAMC §91.9712) plus possible late fees.