Br47052-Mack Street
Non-Refrigerated Warehouse in California, CA · 20273 Mack Street, Hayward · 94545
At a glance
Br47052-Mack Street is a 50,616-square-foot non-refrigerated warehouse at 20273 Mack Street, Hayward in Hayward, California, built in 1977. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 10.0 kBtu/ft² and 36 tCO₂e of greenhouse-gas emissions. That score is higher than 44% of the 2,227 scored non-refrigerated warehouse buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 10.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 36 tCO₂e |
| GHG intensity | 0.7 kgCO₂e/ft² |
| Electricity | 147,868 kWh |
| Gross floor area | 50,616 sq ft |
| Source record | california:11709345:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 75 | ±0 | 10.0 kBtu/ft² | 36 tCO₂e |
| 2022 | 75 | +2 | 10.0 kBtu/ft² | 35 tCO₂e |
| 2021 | 73 | 10.2 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 20273 Mack Street, Hayward
- City
- California
- State
- California
- ZIP
- 94545
- Coordinates
- 37.65423, -122.13424
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Br47052-Mack Street compare with other non-refrigerated warehouse buildings in California?
The latest disclosures cover 2,867 non-refrigerated warehouse buildings in California, out of 40,029 buildings citywide. Br47052-Mack Street's ENERGY STAR score of 75 compares with an average of 68 across the 2,227 that report a score; it scores higher than 44% of them and lower than 54%. Its site EUI of 10.0 kBtu/ft² is about half of the average of 21.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.7 kgCO₂e/ft² is about half of the group average of 1.4 kgCO₂e/ft².
At 50,616 sq ft, it is about 71% below the average floor area of 173,929 sq ft for those buildings. It was built in 1977, 11 years earlier than the group's average year built (1988). Across all 24 jurisdictions BuildingCensus covers, the 4,723 non-refrigerated warehouse buildings average an ENERGY STAR score of 66 and a site EUI of 26.0 kBtu/ft².
How has Br47052-Mack Street's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Br47052-Mack Street, covering report years 2021–2023. Its ENERGY STAR score went from 73 in 2021 to 75 in 2023 (+2 points); its best year on file was 2022, at 75. Site EUI moved from 10.2 kBtu/ft² (2021) to 10.0 kBtu/ft² (2023), a 2% decrease. Reported emissions went from 31 tCO₂e to 36 tCO₂e over the same span (up 15%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 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. Br47052-Mack Street's 10.0 kBtu/ft² across 50,616 sq ft works out to about 0.5 billion Btu (148 MWh-equivalent) in 2023. The disclosure also reports 147,868 kWh of electricity for the year.
Which law requires Br47052-Mack Street to report its energy use?
Br47052-Mack Street 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 2023 disclosure (source record california:11709345:2023). 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 non-refrigerated warehouse buildings in California
- Atherton· 50,565 sq ft · score 34 (D)
- Diablo Business Park (3440-3464)· 50,555 sq ft · score 90 (A)
- 401 E. 6Th St.· 50,548 sq ft · score 93 (A)
- Lax00503 - Lake Forest Bus Ctr 3· 50,518 sq ft
- Industry Circle - 14455 Industry Circle· 50,494 sq ft · EUI 11.4 kBtu/ft²
- Casey Moving Systems· 50,480 sq ft · score 91 (A)
- Non-Refrigerated Warehouse buildings in California· 2,867 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 Br47052-Mack Street's energy grade?
Br47052-Mack Street scores 75 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Br47052-Mack Street use?
Its 2023 site energy-use intensity was 10.0 kBtu/ft² across 50,616 sq ft, including 147,868 kWh of electricity.
What are Br47052-Mack Street's carbon emissions?
Br47052-Mack Street reported 36 tCO₂e of greenhouse-gas emissions (0.7 kgCO₂e/ft²) for 2023.
Where is Br47052-Mack Street?
Br47052-Mack Street is at 20273 Mack Street, Hayward, in Hayward, California 94545. Its coordinates are 37.65423, -122.13424 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Br47052-Mack Street and when was it built?
Br47052-Mack Street has 50,616 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1977 as its year built. It is classed as non-refrigerated warehouse.
Is Br47052-Mack Street covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2023 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, “Br47052-Mack Street, Hayward, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/br47052-mack-street-8339c9ca (data as of July 9, 2026).