1821 S Main St
Multifamily Housing in California, CA · 1821 South Main Street, Los Angeles · 90015
At a glance
1821 S Main St is a 97,309-square-foot multifamily housing building at 1821 South Main Street, Los Angeles in Los Angeles, California, built in 1912. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 99 out of 100 (grade A), a site energy-use intensity of 20.8 kBtu/ft² and 128 tCO₂e of greenhouse-gas emissions. That score is higher than 71% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 99 (band A) |
| Site EUI | 20.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 128 tCO₂e |
| GHG intensity | 1.3 kgCO₂e/ft² |
| Electricity | 296,539 kWh |
| Gross floor area | 97,309 sq ft |
| Source record | california:11285806:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 99 | +1 | 20.8 kBtu/ft² | 128 tCO₂e |
| 2022 | 98 | +1 | 22.7 kBtu/ft² | 136 tCO₂e |
| 2021 | 97 | ±0 | 23.6 kBtu/ft² | 132 tCO₂e |
| 2020 | 97 | -2 | 24.9 kBtu/ft² | 142 tCO₂e |
| 2019 | 99 | 21.7 kBtu/ft² | 126 tCO₂e |
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
- 1821 South Main Street, Los Angeles
- City
- California
- State
- California
- ZIP
- 90015
- Coordinates
- 34.03175, -118.26441
Within ~1 km
Nearby benchmarked buildings
- Ohtow - South Park Centerscore 94
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- The Reefscore 88
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- Public Works Buildingscore 85
Office · 547,426 sq ft
- Public Works Buildingscore 80
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Parking · 416,497 sq ft
- Wrenscore 98
Multifamily Housing · 364,695 sq ft
See also: most efficient in California · biggest emitters
How does 1821 S Main St 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. 1821 S Main St's ENERGY STAR score of 99 compares with an average of 82 across the 9,612 that report a score; it scores higher than 71% of them and lower than 24%. Its site EUI of 20.8 kBtu/ft² is about 40% below the average of 34.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.3 kgCO₂e/ft² is about 38% below the group average of 2.1 kgCO₂e/ft².
At 97,309 sq ft, it is about 36% below the average floor area of 150,919 sq ft for those buildings. It was built in 1912, 76 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.
How has 1821 S Main St's energy performance changed over time?
BuildingCensus holds 5 California disclosures for 1821 S Main St, covering report years 2019–2023. Its ENERGY STAR score was 99 in both 2019 and 2023. Site EUI moved from 21.7 kBtu/ft² (2019) to 20.8 kBtu/ft² (2023), a 4% decrease. Reported emissions went from 126 tCO₂e to 128 tCO₂e over the same span (up 2%).
What does an ENERGY STAR score of 99 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 99 means the building performs better than about 99% of its national peers. BuildingCensus bands the score into report-card grades; 99 falls in band A — high performer (85–100). 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 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. 1821 S Main St's 20.8 kBtu/ft² across 97,309 sq ft works out to about 2 billion Btu (593 MWh-equivalent) in 2023. The disclosure also reports 296,539 kWh of electricity for the year.
Which law requires 1821 S Main St to report its energy use?
1821 S Main St 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:11285806:2023). 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.
More multifamily housing buildings in California
- Northgate Plaza Apartments· 97,290 sq ft · score 93 (A)
- 4981 Catoctin Dr· 97,270 sq ft · score 89 (A)
- 773 W Foothill Blvd, Rialto, Ca 92376, Usa· 97,269 sq ft · score 100 (A)
- Colma Veterans Village· 97,263 sq ft · score 98 (A)
- Wildomar Senior Apartments· 97,220 sq ft · EUI 62.2 kBtu/ft²
- Montecito (Mo097)· 97,168 sq ft · score 1 (D)
- 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 1821 S Main St's energy grade?
1821 S Main St scores 99 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1821 S Main St use?
Its 2023 site energy-use intensity was 20.8 kBtu/ft² across 97,309 sq ft, including 296,539 kWh of electricity.
What are 1821 S Main St's carbon emissions?
1821 S Main St reported 128 tCO₂e of greenhouse-gas emissions (1.3 kgCO₂e/ft²) for 2023.
Where is 1821 S Main St?
1821 S Main St is at 1821 South Main Street, Los Angeles, in Los Angeles, California 90015. Its coordinates are 34.03175, -118.26441 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 1821 S Main St and when was it built?
1821 S Main St has 97,309 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1912 as its year built. It is classed as multifamily housing.
Is 1821 S Main St covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2023 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, “1821 S Main St, Los Angeles, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/1821-s-main-st-55a2a27b (data as of July 9, 2026).