1940 E Mariposa Ave
Office in California, CA · 1940 E Mariposa Ave, El Segundo · 90245
At a glance
1940 E Mariposa Ave is a 83,864-square-foot office building at 1940 E Mariposa Ave, El Segundo in El Segundo, California, built in 1984. In its 2020 California benchmarking disclosure it reported an ENERGY STAR score of 59 out of 100 (grade C), a site energy-use intensity of 88.3 kBtu/ft² and 455 tCO₂e of greenhouse-gas emissions. That score is higher than 21% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2020
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 59 (band C) |
| Site EUI | 88.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 455 tCO₂e |
| GHG intensity | 5.4 kgCO₂e/ft² |
| Electricity | 1,364,513 kWh |
| Natural gas | 27,493 therms |
| Gross floor area | 83,864 sq ft |
| Source record | california:6862197:2020 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2020latest | 59 | +33 | 88.3 kBtu/ft² | 455 tCO₂e |
| 2019 | 26 | ±0 | 126.6 kBtu/ft² | 670 tCO₂e |
| 2018 | 26 | 120.7 kBtu/ft² | 687 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
- 1940 E Mariposa Ave, El Segundo
- City
- California
- State
- California
- ZIP
- 90245
- Coordinates
- 33.92301, -118.39360
Within ~1 km
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How does 1940 E Mariposa Ave compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 1940 E Mariposa Ave's ENERGY STAR score of 59 compares with an average of 75 across the 4,912 that report a score; it scores higher than 21% of them and lower than 79%. Its site EUI of 88.3 kBtu/ft² is about 57% above the average of 56.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 5.4 kgCO₂e/ft² is about 50% above the group average of 3.6 kgCO₂e/ft².
At 83,864 sq ft, it is about 45% below the average floor area of 151,937 sq ft for those buildings. Its 1984 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 1940 E Mariposa Ave's energy performance changed over time?
BuildingCensus holds 3 California disclosures for 1940 E Mariposa Ave, covering report years 2018–2020. Its ENERGY STAR score went from 26 in 2018 to 59 in 2020 (+33 points). Site EUI moved from 120.7 kBtu/ft² (2018) to 88.3 kBtu/ft² (2020), a 27% decrease. Reported emissions went from 687 tCO₂e to 455 tCO₂e over the same span (down 34%).
What does an ENERGY STAR score of 59 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 59 means the building performs better than about 59% of its national peers. BuildingCensus bands the score into report-card grades; 59 falls in band C — below median (55–69). It sits 16 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. 1940 E Mariposa Ave's 88.3 kBtu/ft² across 83,864 sq ft works out to about 7.4 billion Btu (2,170 MWh-equivalent) in 2020. The disclosure also reports 1,364,513 kWh of electricity and 27,493 therms of natural gas for the year.
Which law requires 1940 E Mariposa Ave to report its energy use?
1940 E Mariposa 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 2020 disclosure (source record california:6862197:2020). 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 office buildings in California
- 27349 Agoura Rd (Green Econome - Ab802 Reporting)· 83,853 sq ft · score 1 (D)
- Santa Clara County Ca - San Jose - 880 Ridder Park Drive· 83,841 sq ft · score 73 (B)
- 210 Porter Dr, San Ramon, Ca 94583, Usa· 83,800 sq ft · score 100 (A)
- 521 East 11Th St Llc· 83,784 sq ft · score 54 (D)
- Emerald Lake Corporate Centre· 83,773 sq ft · score 93 (A)
- Shreve Building· 83,770 sq ft · score 1 (D)
- 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 1940 E Mariposa Ave's energy grade?
1940 E Mariposa Ave scores 59 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2020 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1940 E Mariposa Ave use?
Its 2020 site energy-use intensity was 88.3 kBtu/ft² across 83,864 sq ft, including 1,364,513 kWh of electricity and 27,493 therms of natural gas.
What are 1940 E Mariposa Ave's carbon emissions?
1940 E Mariposa Ave reported 455 tCO₂e of greenhouse-gas emissions (5.4 kgCO₂e/ft²) for 2020.
Where is 1940 E Mariposa Ave?
1940 E Mariposa Ave is at 1940 E Mariposa Ave, El Segundo, in El Segundo, California 90245. Its coordinates are 33.92301, -118.39360 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 1940 E Mariposa Ave and when was it built?
1940 E Mariposa Ave has 83,864 sq ft of gross floor area, as reported in its 2020 disclosure. The disclosure lists 1984 as its year built. It is classed as office.
Is 1940 E Mariposa Ave covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2020 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, “1940 E Mariposa Ave, El Segundo, California — 2020 benchmarking disclosure”, https://buildingcensus.com/buildings/california/1940-e-mariposa-ave-4c643d45 (data as of July 9, 2026).