Z042 - Glassrock
Medical Office in California, CA · 2521 Stockton Boulevard, Sacramento · 95817
At a glance
Z042 - Glassrock is a 71,014-square-foot medical office at 2521 Stockton Boulevard, Sacramento in Sacramento, California, built in 1994. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 16 out of 100 (grade D), a site energy-use intensity of 120.1 kBtu/ft² and 540 tCO₂e of greenhouse-gas emissions. That score is higher than 15% of the 546 scored medical office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 16 (band D) |
| Site EUI | 120.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 540 tCO₂e |
| GHG intensity | 7.6 kgCO₂e/ft² |
| Electricity | 1,295,028 kWh |
| Natural gas | 42,580 therms |
| Gross floor area | 71,014 sq ft |
| Source record | california:2861178:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 16 | ±0 | 120.1 kBtu/ft² | 540 tCO₂e |
| 2022 | 16 | -22 | 120.1 kBtu/ft² | 530 tCO₂e |
| 2021 | 38 | +8 | 89.3 kBtu/ft² | 365 tCO₂e |
| 2020 | 30 | +20 | 102.1 kBtu/ft² | 439 tCO₂e |
| 2019 | 10 | +4 | 138.7 kBtu/ft² | 557 tCO₂e |
| 2018 | 6 | 146.8 kBtu/ft² | 590 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
- 2521 Stockton Boulevard, Sacramento
- City
- California
- State
- California
- ZIP
- 95817
- Coordinates
- 38.55204, -121.45529
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Z042 - Glassrock compare with other medical office buildings in California?
The latest disclosures cover 602 medical office buildings in California, out of 40,029 buildings citywide. Z042 - Glassrock's ENERGY STAR score of 16 compares with an average of 63 across the 546 that report a score; it scores higher than 15% of them and lower than 84%. Its site EUI of 120.1 kBtu/ft² is about 27% above the average of 94.3 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 7.6 kgCO₂e/ft² is about 36% above the group average of 5.6 kgCO₂e/ft².
At 71,014 sq ft, it is about 30% below the average floor area of 100,847 sq ft for those buildings. It was built in 1994, 3 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 Z042 - Glassrock's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Z042 - Glassrock, covering report years 2018–2023. Its ENERGY STAR score went from 6 in 2018 to 16 in 2023 (+10 points); its best year on file was 2021, at 38. Site EUI moved from 146.8 kBtu/ft² (2018) to 120.1 kBtu/ft² (2023), a 18% decrease. Reported emissions went from 590 tCO₂e to 540 tCO₂e over the same span (down 9%).
What does an ENERGY STAR score of 16 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 16 means the building performs better than about 16% of its national peers. BuildingCensus bands the score into report-card grades; 16 falls in band D — lowest band (1–54). It sits 59 points below 75, the threshold for ENERGY STAR certification. 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. Z042 - Glassrock's 120.1 kBtu/ft² across 71,014 sq ft works out to about 8.5 billion Btu (2,500 MWh-equivalent) in 2023. The disclosure also reports 1,295,028 kWh of electricity and 42,580 therms of natural gas for the year.
Which law requires Z042 - Glassrock to report its energy use?
Z042 - Glassrock 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:2861178:2023). 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 medical office buildings in California
- 18040 Sherman Way - Sherman Terrace Bldg· 71,000 sq ft · score 94 (A)
- Cn6152 - Fair Oaks Medical Offices· 70,708 sq ft · score 94 (A)
- 2581 Samaritan Drive (Sa365)· 70,500 sq ft · score 80 (B)
- Cn9301 - San Ramon Medical Offices· 70,456 sq ft · score 53 (D)
- 901 Campus Dr· 70,398 sq ft · score 100 (A)
- (0239) Gateway Medical Center· 70,008 sq ft · score 95 (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 Z042 - Glassrock's energy grade?
Z042 - Glassrock scores 16 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Z042 - Glassrock use?
Its 2023 site energy-use intensity was 120.1 kBtu/ft² across 71,014 sq ft, including 1,295,028 kWh of electricity and 42,580 therms of natural gas.
What are Z042 - Glassrock's carbon emissions?
Z042 - Glassrock reported 540 tCO₂e of greenhouse-gas emissions (7.6 kgCO₂e/ft²) for 2023.
Where is Z042 - Glassrock?
Z042 - Glassrock is at 2521 Stockton Boulevard, Sacramento, in Sacramento, California 95817. Its coordinates are 38.55204, -121.45529 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Z042 - Glassrock and when was it built?
Z042 - Glassrock has 71,014 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1994 as its year built. It is classed as medical office.
Is Z042 - Glassrock 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, “Z042 - Glassrock, Sacramento, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/z042-glassrock-13552530 (data as of July 9, 2026).