21171 S Western Ave
Office in California, CA · 21171 South Western Avenue, Torrance · 90501
At a glance
21171 S Western Ave is a 53,218-square-foot office building at 21171 South Western Avenue, Torrance in Torrance, California, built in 1987. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 44.5 kBtu/ft² and 148 tCO₂e of greenhouse-gas emissions. That score is higher than 35% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 44.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 148 tCO₂e |
| GHG intensity | 2.8 kgCO₂e/ft² |
| Electricity | 508,721 kWh |
| Natural gas | 6,174 therms |
| Gross floor area | 53,218 sq ft |
| Source record | california:15085298:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 75 | +35 | 44.5 kBtu/ft² | 148 tCO₂e |
| 2023 | 40 | -25 | 69.4 kBtu/ft² | 249 tCO₂e |
| 2022 | 65 | +64 | 52.8 kBtu/ft² | 179 tCO₂e |
| 2021 | 1 | -99 | 929.6 kBtu/ft² | 2,993 tCO₂e |
| 2020 | 100 | — | 56 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
- 21171 South Western Avenue, Torrance
- City
- California
- State
- California
- ZIP
- 90501
- Coordinates
- 33.83702, -118.31076
Within ~1 km
Nearby benchmarked buildings
- Waypointscore —
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- 1750 214Th Streetscore —
Manufacturing/Industrial Plant · 134,118 sq ft
- 21381 S Western Avescore 43
Hotel · 125,410 sq ft
- Jessie Lord Bakeryscore —
Manufacturing/Industrial Plant · 124,337 sq ft
Distribution Center · 87,320 sq ft
- 20700 Denker Ave - 13049score —
Manufacturing/Industrial Plant · 82,366 sq ft
See also: most efficient in California · biggest emitters
How does 21171 S Western Ave compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 21171 S Western Ave's ENERGY STAR score of 75 compares with an average of 75 across the 4,912 that report a score; it scores higher than 35% of them and lower than 64%. Its site EUI of 44.5 kBtu/ft² is about 21% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.8 kgCO₂e/ft² is about 23% below the group average of 3.6 kgCO₂e/ft².
At 53,218 sq ft, it is about 65% below the average floor area of 151,937 sq ft for those buildings. Its 1987 construction date is close to the group's average year built (1985). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 21171 S Western Ave's energy performance changed over time?
BuildingCensus holds 5 California disclosures for 21171 S Western Ave, covering report years 2020–2024. Its ENERGY STAR score went from 100 in 2020 to 75 in 2024 (-25 points); its best year on file was 2020, at 100. Site EUI moved from 929.6 kBtu/ft² (2021) to 44.5 kBtu/ft² (2024), a 95% decrease. Reported emissions went from 56 tCO₂e to 148 tCO₂e over the same span (up 166%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 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 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. 21171 S Western Ave's 44.5 kBtu/ft² across 53,218 sq ft works out to about 2.4 billion Btu (694 MWh-equivalent) in 2024. The disclosure also reports 508,721 kWh of electricity and 6,174 therms of natural gas for the year.
Which law requires 21171 S Western Ave to report its energy use?
21171 S Western Ave 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:15085298:2024). 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.
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- Office buildings in California· 6,214 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 21171 S Western Ave's energy grade?
21171 S Western Ave scores 75 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 21171 S Western Ave use?
Its 2024 site energy-use intensity was 44.5 kBtu/ft² across 53,218 sq ft, including 508,721 kWh of electricity and 6,174 therms of natural gas.
What are 21171 S Western Ave's carbon emissions?
21171 S Western Ave reported 148 tCO₂e of greenhouse-gas emissions (2.8 kgCO₂e/ft²) for 2024.
Where is 21171 S Western Ave?
21171 S Western Ave is at 21171 South Western Avenue, Torrance, in Torrance, California 90501. Its coordinates are 33.83702, -118.31076 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 21171 S Western Ave and when was it built?
21171 S Western Ave has 53,218 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1987 as its year built. It is classed as office.
Is 21171 S Western Ave 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, “21171 S Western Ave, Torrance, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/21171-s-western-ave-9e708200 (data as of July 9, 2026).