4650 Old Ironsides Dr
Data Center in California, CA · 4650 Old Ironsides Dr., Santa Clara · 95054
At a glance
4650 Old Ironsides Dr is a 124,383-square-foot data center at 4650 Old Ironsides Dr., Santa Clara in Santa Clara, California, built in 1977. In its 2020 California benchmarking disclosure it reported a site energy-use intensity of 1751.8 kBtu/ft² and 14,443 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2020
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 1751.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 14,443 tCO₂e |
| GHG intensity | 116.1 kgCO₂e/ft² |
| Electricity | 63,449,512 kWh |
| Natural gas | 6,020 therms |
| Gross floor area | 124,383 sq ft |
| Source record | california:5716732:2020 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2020latest | — | 1751.8 kBtu/ft² | 14,443 tCO₂e | |
| 2019 | — | 1703.1 kBtu/ft² | 14,912 tCO₂e | |
| 2018 | — | 1599.3 kBtu/ft² | 14,013 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
- 4650 Old Ironsides Dr., Santa Clara
- City
- California
- State
- California
- ZIP
- 95054
- Coordinates
- 37.39768, -121.98159
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 4650 Old Ironsides Dr compare with other data center buildings in California?
The latest disclosures cover 112 data center buildings in California, out of 40,029 buildings citywide. Its site EUI of 1751.8 kBtu/ft² is about twice the average of 832.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 116.1 kgCO₂e/ft² is about twice the group average of 54.8 kgCO₂e/ft².
At 124,383 sq ft, it is about 16% below the average floor area of 147,240 sq ft for those buildings. It was built in 1977, 14 years earlier than the group's average year built (1991). Across all 24 jurisdictions BuildingCensus covers, the 267 data center buildings average an ENERGY STAR score of 68 and a site EUI of 504.4 kBtu/ft².
How has 4650 Old Ironsides Dr's energy performance changed over time?
BuildingCensus holds 3 California disclosures for 4650 Old Ironsides Dr, covering report years 2018–2020. Only 3 of those years carry energy figures.
What does a site EUI of 1751.8 kBtu/ft² mean?
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. 4650 Old Ironsides Dr's 1751.8 kBtu/ft² across 124,383 sq ft works out to about 217.9 billion Btu (63,858 MWh-equivalent) in 2020. The disclosure also reports 63,449,512 kWh of electricity and 6,020 therms of natural gas for the year.
Which law requires 4650 Old Ironsides Dr to report its energy use?
4650 Old Ironsides Dr 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:5716732:2020). 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 data center buildings in California
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- 720 2Nd St (Oak10)· 121,552 sq ft · score 14 (D)
- Co/Glc Smntca/2820 Kovr Dr/West Sacramento/Ca· 121,469 sq ft · EUI 387.8 kBtu/ft²
- Corona Data Center· 120,560 sq ft · score 90 (A)
- Verizon Nec - Rocklin 2, California· 118,836 sq ft · score 98 (A)
- Evoque-Rwc1 (Redwood City Ca)· 118,764 sq ft · EUI 631.1 kBtu/ft²
- Data Center buildings in California· 112 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 4650 Old Ironsides Dr's energy grade?
4650 Old Ironsides Dr did not report an ENERGY STAR score in its 2020 disclosure, but its site energy-use intensity was 1751.8 kBtu/ft².
How much energy does 4650 Old Ironsides Dr use?
Its 2020 site energy-use intensity was 1751.8 kBtu/ft² across 124,383 sq ft, including 63,449,512 kWh of electricity and 6,020 therms of natural gas.
What are 4650 Old Ironsides Dr's carbon emissions?
4650 Old Ironsides Dr reported 14,443 tCO₂e of greenhouse-gas emissions (116.1 kgCO₂e/ft²) for 2020.
Where is 4650 Old Ironsides Dr?
4650 Old Ironsides Dr is at 4650 Old Ironsides Dr., Santa Clara, in Santa Clara, California 95054. Its coordinates are 37.39768, -121.98159 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 4650 Old Ironsides Dr and when was it built?
4650 Old Ironsides Dr has 124,383 sq ft of gross floor area, as reported in its 2020 disclosure. The disclosure lists 1977 as its year built. It is classed as data center.
Is 4650 Old Ironsides Dr 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, “4650 Old Ironsides Dr, Santa Clara, California — 2020 benchmarking disclosure”, https://buildingcensus.com/buildings/california/4650-old-ironsides-dr-56a6b691 (data as of July 9, 2026).