123 S Marengo Ave
Office in California, CA · 123 South Marengo Avenue, Pasadena · 91101
At a glance
123 S Marengo Ave is a 90,484-square-foot office building at 123 South Marengo Avenue, Pasadena in Pasadena, California, built in 1986. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 30 out of 100 (grade D), a site energy-use intensity of 97.6 kBtu/ft² and 566 tCO₂e of greenhouse-gas emissions. That score is higher than 9% 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 | 30 (band D) |
| Site EUI | 97.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 566 tCO₂e |
| GHG intensity | 6.3 kgCO₂e/ft² |
| Electricity | 1,865,922 kWh |
| Natural gas | 27,011 therms |
| Gross floor area | 90,484 sq ft |
| Source record | california:15288425:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 30 | -3 | 97.6 kBtu/ft² | 566 tCO₂e |
| 2023 | 33 | +7 | 95.4 kBtu/ft² | 572 tCO₂e |
| 2022 | 26 | -74 | 97.2 kBtu/ft² | 581 tCO₂e |
| 2020 | 100 | 24.4 kBtu/ft² | 109 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
- 123 South Marengo Avenue, Pasadena
- City
- California
- State
- California
- ZIP
- 91101
- Coordinates
- 34.14299, -118.14637
Within ~1 km
Nearby benchmarked buildings
- Westgate - 29319score 100
Multifamily Housing · 994,732 sq ft
- Pasadena Annex Buildingsscore —
Office · 581,322 sq ft
Multifamily Housing · 483,776 sq ft
- Amli Old Pasadenascore 85
Multifamily Housing · 457,269 sq ft
- Haven Del Mar Station (12165)score 99
Multifamily Housing · 422,987 sq ft
- Westgate Pasadena (Ws211)score 100
Multifamily Housing · 422,263 sq ft
See also: most efficient in California · biggest emitters
How does 123 S Marengo Ave compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 123 S Marengo Ave's ENERGY STAR score of 30 compares with an average of 75 across the 4,912 that report a score; it scores higher than 9% of them and lower than 91%. Its site EUI of 97.6 kBtu/ft² is about 73% 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 6.3 kgCO₂e/ft² is about 74% above the group average of 3.6 kgCO₂e/ft².
At 90,484 sq ft, it is about 40% below the average floor area of 151,937 sq ft for those buildings. Its 1986 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 123 S Marengo Ave's energy performance changed over time?
BuildingCensus holds 4 California disclosures for 123 S Marengo Ave, covering report years 2020, 2022, 2023, 2024. Its ENERGY STAR score went from 100 in 2020 to 30 in 2024 (-70 points); its best year on file was 2020, at 100. Site EUI moved from 24.4 kBtu/ft² (2020) to 97.6 kBtu/ft² (2024), an 300% increase. Reported emissions went from 109 tCO₂e to 566 tCO₂e over the same span (up 419%).
What does an ENERGY STAR score of 30 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 30 means the building performs better than about 30% of its national peers. BuildingCensus bands the score into report-card grades; 30 falls in band D — lowest band (1–54). It sits 45 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. 123 S Marengo Ave's 97.6 kBtu/ft² across 90,484 sq ft works out to about 8.8 billion Btu (2,588 MWh-equivalent) in 2024. The disclosure also reports 1,865,922 kWh of electricity and 27,011 therms of natural gas for the year.
Which law requires 123 S Marengo Ave to report its energy use?
123 S Marengo 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:15288425:2024). 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 office buildings in California
- 898 N. Sepulveda· 90,459 sq ft · EUI 41.4 kBtu/ft²
- Centennial Plaza· 90,435 sq ft · score 71 (B)
- B6· 90,374 sq ft · score 1 (D)
- Rb02 - Rancho Bernardo 2 (Previously Snd17 And Brn03)· 90,308 sq ft · score 51 (D)
- 10503-10507 Valley Blvd· 90,243 sq ft · score 57 (C)
- Palm Court - 15615· 90,226 sq ft · score 67 (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 123 S Marengo Ave's energy grade?
123 S Marengo Ave scores 30 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 123 S Marengo Ave use?
Its 2024 site energy-use intensity was 97.6 kBtu/ft² across 90,484 sq ft, including 1,865,922 kWh of electricity and 27,011 therms of natural gas.
What are 123 S Marengo Ave's carbon emissions?
123 S Marengo Ave reported 566 tCO₂e of greenhouse-gas emissions (6.3 kgCO₂e/ft²) for 2024.
Where is 123 S Marengo Ave?
123 S Marengo Ave is at 123 South Marengo Avenue, Pasadena, in Pasadena, California 91101. Its coordinates are 34.14299, -118.14637 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 123 S Marengo Ave and when was it built?
123 S Marengo Ave has 90,484 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1986 as its year built. It is classed as office.
Is 123 S Marengo 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, “123 S Marengo Ave, Pasadena, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/123-s-marengo-ave-9e6359f2 (data as of July 9, 2026).