21721 Septo
Multifamily Housing in California, CA · 21721 Septo Street, Los Angeles · 91311
At a glance
21721 Septo is a 83,094-square-foot multifamily housing building at 21721 Septo Street, Los Angeles in Los Angeles, California, built in 1971. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 89 out of 100 (grade A), a site energy-use intensity of 43.0 kBtu/ft² and 218 tCO₂e of greenhouse-gas emissions. That score is higher than 45% 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 | 89 (band A) |
| Site EUI | 43.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 218 tCO₂e |
| GHG intensity | 2.6 kgCO₂e/ft² |
| Electricity | 369,271 kWh |
| Gross floor area | 83,094 sq ft |
| Source record | california:6165196:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 89 | +1 | 43.0 kBtu/ft² | 218 tCO₂e |
| 2023 | 88 | -8 | 46.9 kBtu/ft² | 228 tCO₂e |
| 2022 | 96 | +7 | 39.8 kBtu/ft² | 187 tCO₂e |
| 2021 | 89 | +1 | 47.6 kBtu/ft² | 212 tCO₂e |
| 2019 | 88 | 46.7 kBtu/ft² | 221 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
- 21721 Septo Street, Los Angeles
- City
- California
- State
- California
- ZIP
- 91311
- Coordinates
- 34.25136, -118.60248
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 21721 Septo 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. 21721 Septo's ENERGY STAR score of 89 compares with an average of 82 across the 9,612 that report a score; it scores higher than 45% of them and lower than 53%. Its site EUI of 43.0 kBtu/ft² is about 25% 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 2.6 kgCO₂e/ft² is about 25% above the group average of 2.1 kgCO₂e/ft².
At 83,094 sq ft, it is about 45% below the average floor area of 150,919 sq ft for those buildings. It was built in 1971, 17 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 21721 Septo's energy performance changed over time?
BuildingCensus holds 5 California disclosures for 21721 Septo, covering report years 2019, 2021, 2022, 2023, 2024. Its ENERGY STAR score went from 88 in 2019 to 89 in 2024 (+1 points); its best year on file was 2022, at 96. Site EUI moved from 46.7 kBtu/ft² (2019) to 43.0 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 221 tCO₂e to 218 tCO₂e over the same span (down 1%).
What does an ENERGY STAR score of 89 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 89 means the building performs better than about 89% of its national peers. BuildingCensus bands the score into report-card grades; 89 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. 21721 Septo's 43.0 kBtu/ft² across 83,094 sq ft works out to about 3.6 billion Btu (1,047 MWh-equivalent) in 2024. The disclosure also reports 369,271 kWh of electricity for the year.
Which law requires 21721 Septo to report its energy use?
21721 Septo 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:6165196:2024). 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
- Camden Hillcrest - 4325 3Rd Ave· 83,089 sq ft · score 23 (D)
- Villa Madera Apts· 83,081 sq ft · score 100 (A)
- Heritage Plaza· 83,071 sq ft · score 93 (A)
- Meadows Apartment Homes (Md226)· 83,049 sq ft · score 90 (A)
- Ca562_Eaves Old Town Pasadena (Rc75)· 83,025 sq ft · score 65 (C)
- Oak Ridge· 83,016 sq ft · score 94 (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 21721 Septo's energy grade?
21721 Septo scores 89 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 21721 Septo use?
Its 2024 site energy-use intensity was 43.0 kBtu/ft² across 83,094 sq ft, including 369,271 kWh of electricity.
What are 21721 Septo's carbon emissions?
21721 Septo reported 218 tCO₂e of greenhouse-gas emissions (2.6 kgCO₂e/ft²) for 2024.
Where is 21721 Septo?
21721 Septo is at 21721 Septo Street, Los Angeles, in Los Angeles, California 91311. Its coordinates are 34.25136, -118.60248 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 21721 Septo and when was it built?
21721 Septo has 83,094 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1971 as its year built. It is classed as multifamily housing.
Is 21721 Septo 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, “21721 Septo, Los Angeles, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/21721-septo-5dbd5127 (data as of July 9, 2026).