Mpk 55
Office in California, CA · 1374-1376 Willow Rd, Hamilton Ave, Hamilton Ct, Menlo Park · 94025
At a glance
Mpk 55 is a 40,000-square-foot office building at 1374-1376 Willow Rd, Hamilton Ave, Hamilton Ct, Menlo Park in Menlo Park, California, built in 2017. In its 2020 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 9.2 kBtu/ft² and 24 tCO₂e of greenhouse-gas emissions. That score is higher than 91% 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 | 100 (band A) |
| Site EUI | 9.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 24 tCO₂e |
| GHG intensity | 0.6 kgCO₂e/ft² |
| Electricity | 107,913 kWh |
| Natural gas | 0 therms |
| Gross floor area | 40,000 sq ft |
| Source record | california:6444137:2020 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2020latest | 100 | ±0 | 9.2 kBtu/ft² | 24 tCO₂e |
| 2019 | 100 | ±0 | 9.4 kBtu/ft² | 25 tCO₂e |
| 2018 | 100 | 11.2 kBtu/ft² | 31 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
- 1374-1376 Willow Rd, Hamilton Ave, Hamilton Ct, Menlo Park
- City
- California
- State
- California
- ZIP
- 94025
- Coordinates
- 37.47780, -122.15076
Within ~1 km
Nearby benchmarked buildings
- Mpk 21score 79
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- Mpk P3score —
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- Mpk 20score 64
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- 777 Hamilton (Hm71)score 100
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- 777 Hamilton (Hm71) Lg Accountscore 100
Multifamily Housing · 177,292 sq ft
See also: most efficient in California · biggest emitters
How does Mpk 55 compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Mpk 55's ENERGY STAR score of 100 compares with an average of 75 across the 4,912 that report a score; it scores higher than 91% of them. Its site EUI of 9.2 kBtu/ft² is about 84% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.6 kgCO₂e/ft² is about 83% below the group average of 3.6 kgCO₂e/ft².
At 40,000 sq ft, it is about 74% below the average floor area of 151,937 sq ft for those buildings. It was built in 2017, 32 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 Mpk 55's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Mpk 55, covering report years 2018–2020. Its ENERGY STAR score was 100 in both 2018 and 2020. Site EUI moved from 11.2 kBtu/ft² (2018) to 9.2 kBtu/ft² (2020), a 18% decrease. Reported emissions went from 31 tCO₂e to 24 tCO₂e over the same span (down 20%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 falls in band A — high performer (85–100). 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. Mpk 55's 9.2 kBtu/ft² across 40,000 sq ft works out to about 0.4 billion Btu (108 MWh-equivalent) in 2020. The disclosure also reports 107,913 kWh of electricity and 0 therms of natural gas for the year.
Which law requires Mpk 55 to report its energy use?
Mpk 55 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:6444137:2020). 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
- 838 Market· 39,993 sq ft · EUI 9.9 kBtu/ft²
- Results Way Corporate Center - 16 Results Way· 39,978 sq ft
- 11040 White Rock Rd· 39,894 sq ft
- Virgil Place 2018· 39,787 sq ft · score 11 (D)
- Mpk 43· 39,770 sq ft · score 56 (C)
- Grandview· 39,697 sq ft · EUI 131.9 kBtu/ft²
- 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 Mpk 55's energy grade?
Mpk 55 scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2020 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Mpk 55 use?
Its 2020 site energy-use intensity was 9.2 kBtu/ft² across 40,000 sq ft, including 107,913 kWh of electricity and 0 therms of natural gas.
What are Mpk 55's carbon emissions?
Mpk 55 reported 24 tCO₂e of greenhouse-gas emissions (0.6 kgCO₂e/ft²) for 2020.
Where is Mpk 55?
Mpk 55 is at 1374-1376 Willow Rd, Hamilton Ave, Hamilton Ct, Menlo Park, in Menlo Park, California 94025. Its coordinates are 37.47780, -122.15076 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Mpk 55 and when was it built?
Mpk 55 has 40,000 sq ft of gross floor area, as reported in its 2020 disclosure. The disclosure lists 2017 as its year built. It is classed as office.
Is Mpk 55 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, “Mpk 55, Menlo Park, California — 2020 benchmarking disclosure”, https://buildingcensus.com/buildings/california/mpk-55-f975c6d7 (data as of July 9, 2026).