Northbay Health | 4500 Business Center Dr
Medical Office in California, CA · 4500 Business Center Drive, Fairfield · 94534
At a glance
Northbay Health | 4500 Business Center Dr is a 69,194-square-foot medical office at 4500 Business Center Drive, Fairfield in Fairfield, California, built in 2000. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 62.8 kBtu/ft² and 269 tCO₂e of greenhouse-gas emissions. That score is higher than 52% of the 546 scored medical office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 62.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 269 tCO₂e |
| GHG intensity | 3.9 kgCO₂e/ft² |
| Electricity | 843,511 kWh |
| Natural gas | 14,766 therms |
| Gross floor area | 69,194 sq ft |
| Source record | california:28022425:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 75 | -6 | 62.8 kBtu/ft² | 269 tCO₂e |
| 2023 | 81 | -9 | 55.4 kBtu/ft² | 252 tCO₂e |
| 2022 | 90 | 39.9 kBtu/ft² | 189 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
- 4500 Business Center Drive, Fairfield
- City
- California
- State
- California
- ZIP
- 94534
- Coordinates
- 38.22662, -122.13353
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Northbay Health | 4500 Business Center Dr compare with other medical office buildings in California?
The latest disclosures cover 602 medical office buildings in California, out of 40,029 buildings citywide. Northbay Health | 4500 Business Center Dr's ENERGY STAR score of 75 compares with an average of 63 across the 546 that report a score; it scores higher than 52% of them and lower than 45%. Its site EUI of 62.8 kBtu/ft² is about 33% below the average of 94.3 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.9 kgCO₂e/ft² is about 31% below the group average of 5.6 kgCO₂e/ft².
At 69,194 sq ft, it is about 31% below the average floor area of 100,847 sq ft for those buildings. It was built in 2000, 9 years later than the group's average year built (1991). Across all 24 jurisdictions BuildingCensus covers, the 1,266 medical office buildings average an ENERGY STAR score of 64 and a site EUI of 92.2 kBtu/ft².
How has Northbay Health | 4500 Business Center Dr's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Northbay Health | 4500 Business Center Dr, covering report years 2022–2024. Its ENERGY STAR score went from 90 in 2022 to 75 in 2024 (-15 points); its best year on file was 2022, at 90. Site EUI moved from 39.9 kBtu/ft² (2022) to 62.8 kBtu/ft² (2024), an 57% increase. Reported emissions went from 189 tCO₂e to 269 tCO₂e over the same span (up 42%).
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. Northbay Health | 4500 Business Center Dr's 62.8 kBtu/ft² across 69,194 sq ft works out to about 4.3 billion Btu (1,274 MWh-equivalent) in 2024. The disclosure also reports 843,511 kWh of electricity and 14,766 therms of natural gas for the year.
Which law requires Northbay Health | 4500 Business Center Dr to report its energy use?
Northbay Health | 4500 Business Center 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 2024 disclosure (source record california:28022425:2024). 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 medical office buildings in California
- 1043 Elm Ave· 69,188 sq ft · score 88 (A)
- Cedar· 68,951 sq ft · score 76 (B)
- 030157-00 Tustin (Relo)· 68,863 sq ft · EUI 228.2 kBtu/ft²
- Gavin Herbert Eye Institute· 68,827 sq ft · score 4 (D)
- Inactive 550 Washington St· 68,700 sq ft
- Z166 - Patient Contact Center· 68,692 sq ft · score 93 (A)
- Medical Office buildings in California· 602 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 Northbay Health | 4500 Business Center Dr's energy grade?
Northbay Health | 4500 Business Center Dr scores 75 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 Northbay Health | 4500 Business Center Dr use?
Its 2024 site energy-use intensity was 62.8 kBtu/ft² across 69,194 sq ft, including 843,511 kWh of electricity and 14,766 therms of natural gas.
What are Northbay Health | 4500 Business Center Dr's carbon emissions?
Northbay Health | 4500 Business Center Dr reported 269 tCO₂e of greenhouse-gas emissions (3.9 kgCO₂e/ft²) for 2024.
Where is Northbay Health | 4500 Business Center Dr?
Northbay Health | 4500 Business Center Dr is at 4500 Business Center Drive, Fairfield, in Fairfield, California 94534. Its coordinates are 38.22662, -122.13353 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Northbay Health | 4500 Business Center Dr and when was it built?
Northbay Health | 4500 Business Center Dr has 69,194 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2000 as its year built. It is classed as medical office.
Is Northbay Health | 4500 Business Center Dr 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, “Northbay Health | 4500 Business Center Dr, Fairfield, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/northbay-health-4500-business-center-dr-b6b0ca57 (data as of July 9, 2026).