Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices
Medical Office in California, CA · 3401 South Harbor Boulevard, Santa Ana · 92704
At a glance
Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices is a 80,226-square-foot medical office at 3401 South Harbor Boulevard, Santa Ana in Santa Ana, California, built in 1999. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 23 out of 100 (grade D), a site energy-use intensity of 117.3 kBtu/ft² and 605 tCO₂e of greenhouse-gas emissions. That score is higher than 17% of the 546 scored medical office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 23 (band D) |
| Site EUI | 117.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 605 tCO₂e |
| GHG intensity | 7.5 kgCO₂e/ft² |
| Electricity | 1,628,514 kWh |
| Natural gas | 25,514 therms |
| Gross floor area | 80,226 sq ft |
| Source record | california:2551384:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 23 | +11 | 117.3 kBtu/ft² | 605 tCO₂e |
| 2023 | 12 | +9 | 134.0 kBtu/ft² | 715 tCO₂e |
| 2022 | 3 | -5 | 159.9 kBtu/ft² | 834 tCO₂e |
| 2021 | 8 | +1 | 150.0 kBtu/ft² | 708 tCO₂e |
| 2020 | 7 | +2 | 164.1 kBtu/ft² | 829 tCO₂e |
| 2018 | 5 | 153.9 kBtu/ft² | 815 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 3401 South Harbor Boulevard, Santa Ana
- City
- California
- State
- California
- ZIP
- 92704
- Coordinates
- 33.70133, -117.91803
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices compare with other medical office buildings in California?
The latest disclosures cover 602 medical office buildings in California, out of 40,029 buildings citywide. Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices's ENERGY STAR score of 23 compares with an average of 63 across the 546 that report a score; it scores higher than 17% of them and lower than 82%. Its site EUI of 117.3 kBtu/ft² is about 24% above the average of 94.3 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 7.5 kgCO₂e/ft² is about 35% above the group average of 5.6 kgCO₂e/ft².
At 80,226 sq ft, it is about 20% below the average floor area of 100,847 sq ft for those buildings. It was built in 1999, 8 years later than the group's average year built (1991). Across all 24 jurisdictions BuildingCensus covers, the 1,266 medical office buildings average an ENERGY STAR score of 64 and a site EUI of 92.2 kBtu/ft².
How has Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices, covering report years 2018, 2020, 2021, 2022, 2023, 2024. Its ENERGY STAR score went from 5 in 2018 to 23 in 2024 (+18 points). Site EUI moved from 153.9 kBtu/ft² (2018) to 117.3 kBtu/ft² (2024), a 24% decrease. Reported emissions went from 815 tCO₂e to 605 tCO₂e over the same span (down 26%).
What does an ENERGY STAR score of 23 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 23 means the building performs better than about 23% of its national peers. BuildingCensus bands the score into report-card grades; 23 falls in band D — lowest band (1–54). It sits 52 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. Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices's 117.3 kBtu/ft² across 80,226 sq ft works out to about 9.4 billion Btu (2,758 MWh-equivalent) in 2024. The disclosure also reports 1,628,514 kWh of electricity and 25,514 therms of natural gas for the year.
Which law requires Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices to report its energy use?
Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices 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:2551384:2024). 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 medical office buildings in California
- 1040 Elm Ave· 80,150 sq ft · score 93 (A)
- Palomar Health Outpatient Center Ii· 80,064 sq ft · score 80 (B)
- Mhs | Long Beach | Children'S Village Mob· 80,000 sq ft · score 91 (A)
- 1195 W Fremont Ave· 79,890 sq ft · score 4 (D)
- 1195 W Fremont Ave· 79,890 sq ft · score 6 (D)
- 1111 E. Stanley Blvd· 79,000 sq ft · score 1 (D)
- Medical Office buildings in California· 602 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 Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices's energy grade?
Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices scores 23 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices use?
Its 2024 site energy-use intensity was 117.3 kBtu/ft² across 80,226 sq ft, including 1,628,514 kWh of electricity and 25,514 therms of natural gas.
What are Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices's carbon emissions?
Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices reported 605 tCO₂e of greenhouse-gas emissions (7.5 kgCO₂e/ft²) for 2024.
Where is Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices?
Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices is at 3401 South Harbor Boulevard, Santa Ana, in Santa Ana, California 92704. Its coordinates are 33.70133, -117.91803 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices and when was it built?
Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices has 80,226 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1999 as its year built. It is classed as medical office.
Is Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices 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, “Kaiser Permanente - Ca3941 - Harbor/Macarthur Medical Offices, Santa Ana, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/kaiser-permanente-ca3941-harbor-macarthur-medical-offices-7922ff78 (data as of July 9, 2026).