148 E William St
Multifamily Housing in San José, CA · 95112
At a glance
148 E William St is a 30,000-square-foot multifamily housing building in San José, California, built in 1965. It is listed in the 2024 Energy and Water Building Performance Ordinance disclosure without energy figures: no ENERGY STAR score, energy use or emissions were published for it that year. Its most recent reported figures are from 2023, when it scored 100 out of 100 on ENERGY STAR with a site EUI of 28.0 kBtu/ft².
No energy data reported for 2024
148 E William St appears in the 2024 Energy and Water Building Performance Ordinance disclosure, but no ENERGY STAR score, energy use or emissions were published for it — the building did not report benchmarking data for that year. Earlier reported years are in the table below.
Floor area on file: 30,000 sq ft · Built 1965
Source record san_jose:1642-0-00:2024
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | — | — | |
| 2023 | 100 | ±0 | 28.0 kBtu/ft² | 48 tCO₂e |
| 2022 | 100 | ±0 | 22.0 kBtu/ft² | 39 tCO₂e |
| 2021 | 100 | 14.0 kBtu/ft² | — | |
| 2020 | — | — | — | |
| 2019 | — | — | — |
Compliance context
San José Municipal Code Ch. 17.85 (Energy and Water Building Performance Ordinance)
San José's BPO requires buildings over 20,000 sq ft to benchmark annually and complete beyond-benchmarking performance improvements on a rolling schedule.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 148 E William St
- City
- San José
- State
- California
- ZIP
- 95112
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in San José · biggest emitters
How has 148 E William St's energy performance changed over time?
BuildingCensus holds 6 San José disclosures for 148 E William St, covering report years 2019–2024. Its ENERGY STAR score was 100 in both 2021 and 2023. Site EUI moved from 14.0 kBtu/ft² (2021) to 28.0 kBtu/ft² (2023), an 100% increase. Reported emissions went from 39 tCO₂e to 48 tCO₂e over the same span (up 23%).
Which law requires 148 E William St to report its energy use?
148 E William St reports under San José Municipal Code Ch. 17.85 (Energy and Water Building Performance Ordinance), the legal basis of San José's Energy and Water Building Performance Ordinance, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record san_jose:1642-0-00:2024). San José's BPO requires buildings over 20,000 sq ft to benchmark annually and complete beyond-benchmarking performance improvements on a rolling schedule.
More multifamily housing buildings in San José
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- 1150 Pedro St· 29,893 sq ft · score 80 (B)
- 51 S 19Th St· 29,776 sq ft
- 3200 Loma Verde Dr· 29,634 sq ft · score 97 (A)
- Multifamily Housing buildings in San José· 476 benchmarked
- All San José benchmarked buildings· San José Municipal Code Ch. 17.85 (Energy and Water Building Performance Ordinance)
- Most efficient large buildings in San José
- Least efficient large buildings in San José
- Biggest emitters in San José
Frequently asked questions
What is 148 E William St's energy grade?
148 E William St has no grade: it did not report energy data for 2024. The 2024 Energy and Water Building Performance Ordinance disclosure lists the building but publishes no ENERGY STAR score, energy use or emissions for it.
Where is 148 E William St?
148 E William St is in San José, California 95112.
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About this data
Source: Energy and Water Building Performance Ordinance (San José Municipal Code Ch. 17.85 (Energy and Water Building Performance Ordinance)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “148 E William St, San José, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/san-jose/148-e-william-st-675ebe27 (data as of July 9, 2026).