Cotton Medical North Tower
Medical Office in California, CA · 50 Bellefontaine Street, Pasadena · 91105
At a glance
Cotton Medical North Tower is a 52,731-square-foot medical office at 50 Bellefontaine Street, Pasadena in Pasadena, California, built in 1974. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 84 out of 100 (grade B), a site energy-use intensity of 61.5 kBtu/ft² and 205 tCO₂e of greenhouse-gas emissions. That score is higher than 62% 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 | 84 (band B) |
| Site EUI | 61.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 205 tCO₂e |
| GHG intensity | 3.9 kgCO₂e/ft² |
| Electricity | 675,172 kWh |
| Natural gas | 9,826 therms |
| Gross floor area | 52,731 sq ft |
| Source record | california:8766582:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 84 | -2 | 61.5 kBtu/ft² | 205 tCO₂e |
| 2023 | 86 | +8 | 52.8 kBtu/ft² | 195 tCO₂e |
| 2022 | 78 | -2 | 59.5 kBtu/ft² | 201 tCO₂e |
| 2021 | 80 | +6 | 58.9 kBtu/ft² | 181 tCO₂e |
| 2020 | 74 | 54.2 kBtu/ft² | 177 tCO₂e | |
| 2019 | — | — | — |
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
- 50 Bellefontaine Street, Pasadena
- City
- California
- State
- California
- ZIP
- 91105
- Coordinates
- 34.13138, -118.15175
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Cotton Medical North Tower compare with other medical office buildings in California?
The latest disclosures cover 602 medical office buildings in California, out of 40,029 buildings citywide. Cotton Medical North Tower's ENERGY STAR score of 84 compares with an average of 63 across the 546 that report a score; it scores higher than 62% of them and lower than 36%. Its site EUI of 61.5 kBtu/ft² is about 35% below the average of 94.3 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.9 kgCO₂e/ft² is about 31% below the group average of 5.6 kgCO₂e/ft².
At 52,731 sq ft, it is about half of the average floor area of 100,847 sq ft for those buildings. It was built in 1974, 17 years earlier 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 Cotton Medical North Tower's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Cotton Medical North Tower, covering report years 2019–2024. Its ENERGY STAR score went from 74 in 2020 to 84 in 2024 (+10 points); its best year on file was 2023, at 86. Site EUI moved from 54.2 kBtu/ft² (2020) to 61.5 kBtu/ft² (2024), an 13% increase. Reported emissions went from 177 tCO₂e to 205 tCO₂e over the same span (up 16%).
What does an ENERGY STAR score of 84 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 84 means the building performs better than about 84% of its national peers. BuildingCensus bands the score into report-card grades; 84 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. Cotton Medical North Tower's 61.5 kBtu/ft² across 52,731 sq ft works out to about 3.2 billion Btu (950 MWh-equivalent) in 2024. The disclosure also reports 675,172 kWh of electricity and 9,826 therms of natural gas for the year.
Which law requires Cotton Medical North Tower to report its energy use?
Cotton Medical North Tower 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:8766582:2024). 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
- Cn2802 - Folsom Ambulatory Surgery Center· 52,613 sq ft · score 1 (D)
- Valley Medical Plaza Ii· 52,588 sq ft · score 37 (D)
- 301 W Bastanchury· 52,531 sq ft · score 83 (B)
- Sutter Health-3100 Telegraph Avenue· 52,400 sq ft · score 100 (A)
- Alvarado Road 6719 Llc· 52,366 sq ft · score 94 (A)
- Cn7751 - Scotts Valley Medical Offices· 52,227 sq ft · score 100 (A)
- 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 Cotton Medical North Tower's energy grade?
Cotton Medical North Tower scores 84 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 Cotton Medical North Tower use?
Its 2024 site energy-use intensity was 61.5 kBtu/ft² across 52,731 sq ft, including 675,172 kWh of electricity and 9,826 therms of natural gas.
What are Cotton Medical North Tower's carbon emissions?
Cotton Medical North Tower reported 205 tCO₂e of greenhouse-gas emissions (3.9 kgCO₂e/ft²) for 2024.
Where is Cotton Medical North Tower?
Cotton Medical North Tower is at 50 Bellefontaine Street, Pasadena, in Pasadena, California 91105. Its coordinates are 34.13138, -118.15175 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Cotton Medical North Tower and when was it built?
Cotton Medical North Tower has 52,731 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1974 as its year built. It is classed as medical office.
Is Cotton Medical North Tower 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, “Cotton Medical North Tower, Pasadena, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/cotton-medical-north-tower-1f373424 (data as of July 9, 2026).