451 S MAIN ST

How does 451 S MAIN 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. 451 S MAIN ST's ENERGY STAR score of 56 compares with an average of 78 across the 3,344 that report a score; it scores higher than 14% of them and lower than 85%. Its site EUI of 63.1 kBtu/ft² is about 70% above the average of 37.2 kBtu/ft² — it uses more energy per square foot than the typical building in that group.

At 190,954 sq ft, it is about 215% above the average floor area of 60,540 sq ft for those buildings. It was built in 1917, 58 years earlier 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 451 S MAIN ST's energy performance changed over time?

BuildingCensus holds 10 Los Angeles disclosures for 451 S MAIN ST, covering report years 2016–2025. Its ENERGY STAR score went from 71 in 2016 to 56 in 2025 (-15 points); its best year on file was 2018, at 96. Site EUI moved from 44.1 kBtu/ft² (2016) to 63.1 kBtu/ft² (2025), an 43% increase. Reported emissions went from 588 tCO₂e to 657 tCO₂e over the same span (up 12%).

What does an ENERGY STAR score of 56 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 56 means the building performs better than about 56% of its national peers. BuildingCensus bands the score into report-card grades; 56 falls in band C — below median (55–69). It sits 19 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. 451 S MAIN ST's 63.1 kBtu/ft² across 190,954 sq ft works out to about 12 billion Btu (3,531 MWh-equivalent) in 2025. Its source EUI of 104.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 8,098 thousand gallons of water for the year.

Which law requires 451 S MAIN ST to report its energy use?

451 S MAIN 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:486353839586:2025). 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.