Mpk 21
Office in California, CA · 1 Facebook Way - Mpk0021, Menlo Park · 94025
At a glance
Mpk 21 is a 625,504-square-foot office building at 1 Facebook Way - Mpk0021, Menlo Park in Menlo Park, California, built in 2018. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 79 out of 100 (grade B), a site energy-use intensity of 80.1 kBtu/ft² and 2,797 tCO₂e of greenhouse-gas emissions. That score is higher than 41% 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 | 79 (band B) |
| Site EUI | 80.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 2,797 tCO₂e |
| GHG intensity | 4.5 kgCO₂e/ft² |
| Electricity | 8,248,828 kWh |
| Natural gas | 175,007 therms |
| Gross floor area | 625,504 sq ft |
| Source record | california:7067295:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 79 | -2 | 80.1 kBtu/ft² | 2,797 tCO₂e |
| 2023 | 81 | +2 | 78.5 kBtu/ft² | 2,978 tCO₂e |
| 2022 | 79 | -12 | 85.7 kBtu/ft² | 3,126 tCO₂e |
| 2021 | 91 | -7 | — | 2,257 tCO₂e |
| 2020 | 98 | +17 | 39.3 kBtu/ft² | 1,430 tCO₂e |
| 2019 | 81 | 80.1 kBtu/ft² | 2,851 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
- 1 Facebook Way - Mpk0021, Menlo Park
- City
- California
- State
- California
- ZIP
- 94025
- Coordinates
- 37.48109, -122.15831
Within ~1 km
Nearby benchmarked buildings
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See also: most efficient in California · biggest emitters
How does Mpk 21 compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Mpk 21's ENERGY STAR score of 79 compares with an average of 75 across the 4,912 that report a score; it scores higher than 41% of them and lower than 58%. Its site EUI of 80.1 kBtu/ft² is about 42% 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 4.5 kgCO₂e/ft² is about 24% above the group average of 3.6 kgCO₂e/ft².
At 625,504 sq ft, it is about 312% above the average floor area of 151,937 sq ft for those buildings. It was built in 2018, 33 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 21's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Mpk 21, covering report years 2019–2024. Its ENERGY STAR score went from 81 in 2019 to 79 in 2024 (-2 points); its best year on file was 2020, at 98. Site EUI moved from 80.1 kBtu/ft² (2019) to 80.1 kBtu/ft² (2024), an 0% increase. Reported emissions went from 2,851 tCO₂e to 2,797 tCO₂e over the same span (down 2%).
What does an ENERGY STAR score of 79 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 79 means the building performs better than about 79% of its national peers. BuildingCensus bands the score into report-card grades; 79 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. Mpk 21's 80.1 kBtu/ft² across 625,504 sq ft works out to about 50.1 billion Btu (14,684 MWh-equivalent) in 2024. The disclosure also reports 8,248,828 kWh of electricity and 175,007 therms of natural gas for the year.
Which law requires Mpk 21 to report its energy use?
Mpk 21 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:7067295:2024). 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.
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- Office buildings in California· 6,214 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
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Frequently asked questions
What is Mpk 21's energy grade?
Mpk 21 scores 79 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 Mpk 21 use?
Its 2024 site energy-use intensity was 80.1 kBtu/ft² across 625,504 sq ft, including 8,248,828 kWh of electricity and 175,007 therms of natural gas.
What are Mpk 21's carbon emissions?
Mpk 21 reported 2,797 tCO₂e of greenhouse-gas emissions (4.5 kgCO₂e/ft²) for 2024.
Where is Mpk 21?
Mpk 21 is at 1 Facebook Way - Mpk0021, Menlo Park, in Menlo Park, California 94025. Its coordinates are 37.48109, -122.15831 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Mpk 21 and when was it built?
Mpk 21 has 625,504 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2018 as its year built. It is classed as office.
Is Mpk 21 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, “Mpk 21, Menlo Park, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/mpk-21-ccea6d5c (data as of July 9, 2026).