21106 PARTHENIA ST

How does 21106 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. 21106 PARTHENIA ST's ENERGY STAR score of 81 compares with an average of 78 across the 3,344 that report a score; it scores higher than 43% of them and lower than 56%. Its site EUI of 46.2 kBtu/ft² is about 24% above the average of 37.2 kBtu/ft² — it uses more energy per square foot than the typical building in that group.

At 24,100 sq ft, it is about 60% below the average floor area of 60,540 sq ft for those buildings. It was built in 1980, 5 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 21106 PARTHENIA ST's energy performance changed over time?

BuildingCensus holds 8 Los Angeles disclosures for 21106 PARTHENIA ST, covering report years 2018–2025. Its ENERGY STAR score went from 100 in 2018 to 81 in 2025 (-19 points); its best year on file was 2018, at 100. Site EUI moved from 32.6 kBtu/ft² (2018) to 46.2 kBtu/ft² (2025), an 42% increase. Reported emissions went from 42 tCO₂e to 61 tCO₂e over the same span (up 44%).

What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 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 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. 21106 PARTHENIA ST's 46.2 kBtu/ft² across 24,100 sq ft works out to about 1.1 billion Btu (326 MWh-equivalent) in 2025. Its source EUI of 78.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3 thousand gallons of water for the year.

Which law requires 21106 PARTHENIA ST to report its energy use?

21106 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:999000000292:2025). 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.