Rosslyn Lofts Apartments
Multifamily Housing in California, CA · 451 South Main Street, Los Angeles · 90013
At a glance
Rosslyn Lofts Apartments is a 190,954-square-foot multifamily housing building at 451 South Main Street, Los Angeles in Los Angeles, California, built in 1917. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 41 out of 100 (grade D), a site energy-use intensity of 62.3 kBtu/ft² and 722 tCO₂e of greenhouse-gas emissions. That score is higher than 7% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 41 (band D) |
| Site EUI | 62.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 722 tCO₂e |
| GHG intensity | 3.8 kgCO₂e/ft² |
| Electricity | 1,631,912 kWh |
| Gross floor area | 190,954 sq ft |
| Source record | california:40255592:2024 |
Compliance context
AB 802 (Public Resources Code §25402.10)
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.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 451 South Main Street, Los Angeles
- City
- California
- State
- California
- ZIP
- 90013
- Coordinates
- 34.04704, -118.24846
Within ~1 km
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- Bank Of America Plazascore 89
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See also: most efficient in California · biggest emitters
How does Rosslyn Lofts Apartments 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. Rosslyn Lofts Apartments's ENERGY STAR score of 41 compares with an average of 82 across the 9,612 that report a score; it scores higher than 7% of them and lower than 92%. Its site EUI of 62.3 kBtu/ft² is about 81% 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 3.8 kgCO₂e/ft² is about 80% above the group average of 2.1 kgCO₂e/ft².
At 190,954 sq ft, it is about 27% above the average floor area of 150,919 sq ft for those buildings. It was built in 1917, 71 years earlier 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.
What does an ENERGY STAR score of 41 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 41 means the building performs better than about 41% of its national peers. BuildingCensus bands the score into report-card grades; 41 falls in band D — lowest band (1–54). It sits 34 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. Rosslyn Lofts Apartments's 62.3 kBtu/ft² across 190,954 sq ft works out to about 11.9 billion Btu (3,487 MWh-equivalent) in 2024. The disclosure also reports 1,631,912 kWh of electricity for the year.
Which law requires Rosslyn Lofts Apartments to report its energy use?
Rosslyn Lofts Apartments 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 2024 disclosure (source record california:40255592:2024). 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.
More multifamily housing buildings in California
- Mresidences Olympic & Olive· 190,896 sq ft · score 64 (C)
- Spring Meadows· 190,833 sq ft · score 65 (C)
- El Norte Villas (Ln01)· 190,800 sq ft · score 100 (A)
- Park - Ii #13· 190,677 sq ft · score 76 (B)
- Lofts At The Security Building· 190,656 sq ft · score 40 (D)
- 23855 Arroyo Park Dr· 190,508 sq ft · score 99 (A)
- Multifamily Housing buildings in California· 10,630 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is Rosslyn Lofts Apartments's energy grade?
Rosslyn Lofts Apartments scores 41 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Rosslyn Lofts Apartments use?
Its 2024 site energy-use intensity was 62.3 kBtu/ft² across 190,954 sq ft, including 1,631,912 kWh of electricity.
What are Rosslyn Lofts Apartments's carbon emissions?
Rosslyn Lofts Apartments reported 722 tCO₂e of greenhouse-gas emissions (3.8 kgCO₂e/ft²) for 2024.
Where is Rosslyn Lofts Apartments?
Rosslyn Lofts Apartments is at 451 South Main Street, Los Angeles, in Los Angeles, California 90013. Its coordinates are 34.04704, -118.24846 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Rosslyn Lofts Apartments and when was it built?
Rosslyn Lofts Apartments has 190,954 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1917 as its year built. It is classed as multifamily housing.
Is Rosslyn Lofts Apartments covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Rosslyn Lofts Apartments, Los Angeles, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/rosslyn-lofts-apartments-1486173a (data as of July 9, 2026).