Ca6-921 450 American
Office in California, CA · 450 American St, Simi Valley · 93065
At a glance
Ca6-921 450 American is a 204,907-square-foot office building at 450 American St, Simi Valley in Simi Valley, California, built in 1990. In its 2021 California benchmarking disclosure it reported an ENERGY STAR score of 80 out of 100 (grade B), a site energy-use intensity of 67.6 kBtu/ft² and 802 tCO₂e of greenhouse-gas emissions. That score is higher than 42% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 80 (band B) |
| Site EUI | 67.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 802 tCO₂e |
| GHG intensity | 3.9 kgCO₂e/ft² |
| Electricity | 3,028,321 kWh |
| Natural gas | 33,337 therms |
| Gross floor area | 204,907 sq ft |
| Source record | california:1770806:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | 80 | +1 | 67.6 kBtu/ft² | 802 tCO₂e |
| 2019 | 79 | +1 | 68.0 kBtu/ft² | 877 tCO₂e |
| 2018 | 78 | — | 881 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
- 450 American St, Simi Valley
- City
- California
- State
- California
- ZIP
- 93065
- Coordinates
- 34.28717, -118.78689
Within ~1 km
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- Walmart Store #2621score —
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- 6640 - Simi Valleyscore 93
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- Aerovironment Inc.score 78
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- Simi Valley Corporate Point Llcscore 65
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See also: most efficient in California · biggest emitters
How does Ca6-921 450 American compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Ca6-921 450 American's ENERGY STAR score of 80 compares with an average of 75 across the 4,912 that report a score; it scores higher than 42% of them and lower than 56%. Its site EUI of 67.6 kBtu/ft² is about 20% 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 3.9 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².
At 204,907 sq ft, it is about 35% above the average floor area of 151,937 sq ft for those buildings. It was built in 1990, 5 years later than 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 Ca6-921 450 American's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Ca6-921 450 American, covering report years 2018, 2019, 2021. Its ENERGY STAR score went from 78 in 2018 to 80 in 2021 (+2 points). Site EUI moved from 68.0 kBtu/ft² (2019) to 67.6 kBtu/ft² (2021), a 1% decrease. Reported emissions went from 881 tCO₂e to 802 tCO₂e over the same span (down 9%).
What does an ENERGY STAR score of 80 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 80 means the building performs better than about 80% of its national peers. BuildingCensus bands the score into report-card grades; 80 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. Ca6-921 450 American's 67.6 kBtu/ft² across 204,907 sq ft works out to about 13.9 billion Btu (4,060 MWh-equivalent) in 2021. The disclosure also reports 3,028,321 kWh of electricity and 33,337 therms of natural gas for the year.
Which law requires Ca6-921 450 American to report its energy use?
Ca6-921 450 American 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 2021 disclosure (source record california:1770806:2021). 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
- 100 W Broadway· 204,748 sq ft · score 93 (A)
- 1015-1055 Main St· 204,727 sq ft · score 71 (B)
- Newport Freeway Business Park· 204,726 sq ft · score 100 (A)
- 2175 Mt. Diablo Plaza· 204,571 sq ft · score 94 (A)
- 795 Folsom Street· 204,560 sq ft · score 91 (A)
- Trea - Pacific Coast Highway Llc· 204,411 sq ft · score 62 (C)
- 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 Ca6-921 450 American's energy grade?
Ca6-921 450 American scores 80 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2021 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Ca6-921 450 American use?
Its 2021 site energy-use intensity was 67.6 kBtu/ft² across 204,907 sq ft, including 3,028,321 kWh of electricity and 33,337 therms of natural gas.
What are Ca6-921 450 American's carbon emissions?
Ca6-921 450 American reported 802 tCO₂e of greenhouse-gas emissions (3.9 kgCO₂e/ft²) for 2021.
Where is Ca6-921 450 American?
Ca6-921 450 American is at 450 American St, Simi Valley, in Simi Valley, California 93065. Its coordinates are 34.28717, -118.78689 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Ca6-921 450 American and when was it built?
Ca6-921 450 American has 204,907 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1990 as its year built. It is classed as office.
Is Ca6-921 450 American covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2021 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, “Ca6-921 450 American, Simi Valley, California — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/california/ca6-921-450-american-4f44c0c6 (data as of July 9, 2026).