California Walk
Multifamily (5+ Units) in Berkeley, CA · 2091 CALIFORNIA ST
At a glance
California Walk is a 30,288-square-foot multifamily (5+ units) building at 2091 CALIFORNIA ST in Berkeley, California. In its 2025 Berkeley benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A) and a site energy-use intensity of 35.9 kBtu/ft². That score is higher than 56% of the 156 scored multifamily (5+ units) buildings in Berkeley.
BESO (BMC Chapter 19.81) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 35.9 kBtu/ft² |
| Source EUI | 49.1 kBtu/ft² |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 58,153 kWh |
| Natural gas | 8,874 therms |
| Gross floor area | 30,288 sq ft |
| Source record | berkeley:2880:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 100 | ±0 | 35.9 kBtu/ft² | — |
| 2024 | 100 | ±0 | 39.7 kBtu/ft² | — |
| 2023 | 100 | ±0 | 42.0 kBtu/ft² | — |
| 2022 | 100 | 40.0 kBtu/ft² | — |
Compliance context
BESO (BMC Chapter 19.81)
Berkeley's BESO requires annual benchmarking for commercial and multifamily buildings of 15,000 sq ft or more, with energy assessments at time of listing and every five years for buildings of 25,000 sq ft or more.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 2091 CALIFORNIA ST
- City
- Berkeley
- State
- California
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Berkeley · biggest emitters
How does California Walk compare with other multifamily (5+ units) buildings in Berkeley?
The latest disclosures cover 202 multifamily (5+ units) buildings in Berkeley, out of 440 buildings citywide. California Walk's ENERGY STAR score of 100 compares with an average of 92 across the 156 that report a score; it scores higher than 56% of them. Its site EUI of 35.9 kBtu/ft² is roughly in line with the average of 32.9 kBtu/ft².
At 30,288 sq ft, it is roughly in line with the average floor area of 33,316 sq ft for those buildings.
How has California Walk's energy performance changed over time?
BuildingCensus holds 4 Berkeley disclosures for California Walk, covering report years 2022–2025. Its ENERGY STAR score was 100 in both 2022 and 2025. Site EUI moved from 40.0 kBtu/ft² (2022) to 35.9 kBtu/ft² (2025), a 10% decrease.
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 falls in band A — high performer (85–100). 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 Berkeley, 82% 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. California Walk's 35.9 kBtu/ft² across 30,288 sq ft works out to about 1.1 billion Btu (319 MWh-equivalent) in 2025. Its source EUI of 49.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 58,153 kWh of electricity and 8,874 therms of natural gas for the year.
Which law requires California Walk to report its energy use?
California Walk reports under BESO (BMC Chapter 19.81), the legal basis of Berkeley's Building Emissions Saving Ordinance, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record berkeley:2880:2025). Berkeley's BESO requires annual benchmarking for commercial and multifamily buildings of 15,000 sq ft or more, with energy assessments at time of listing and every five years for buildings of 25,000 sq ft or more.
More multifamily (5+ units) buildings in Berkeley
- 2117 Haste St· 30,048 sq ft · score 100 (A)
- 2606 Benvenue Ave· 29,868 sq ft · EUI 23.5 kBtu/ft²
- 2066 UNIVERSITY AVE· 29,862 sq ft · score 19 (D)
- 2715 Dwight Way· 29,856 sq ft · score 100 (A)
- 2514-2516 Piedmont Ave· 29,814 sq ft · score 98 (A)
- 2526-2528 Durant Ave· 29,590 sq ft · score 100 (A)
- Multifamily (5+ Units) buildings in Berkeley· 202 benchmarked
- All Berkeley benchmarked buildings· BESO (BMC Chapter 19.81)
- Most efficient large buildings in Berkeley
- Least efficient large buildings in Berkeley
- Biggest emitters in Berkeley
Frequently asked questions
What is California Walk's energy grade?
California Walk scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Berkeley disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does California Walk use?
Its 2025 site energy-use intensity was 35.9 kBtu/ft² (49.1 kBtu/ft² source) across 30,288 sq ft, including 58,153 kWh of electricity and 8,874 therms of natural gas.
What are California Walk's carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is California Walk?
California Walk is at 2091 CALIFORNIA ST, in Berkeley, California.
How big is California Walk and when was it built?
California Walk has 30,288 sq ft of gross floor area, as reported in its 2025 disclosure. It is classed as multifamily (5+ units).
Is California Walk covered by BESO (BMC Chapter 19.81)?
Yes — it appears in the 2025 Building Emissions Saving Ordinance disclosure, which lists the buildings reporting under BESO (BMC Chapter 19.81).
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About this data
Source: Building Emissions Saving Ordinance (BESO (BMC Chapter 19.81)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “California Walk, Berkeley, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/berkeley/california-walk-5e567d0e (data as of October 2, 2026).