Regency Plaza Apartments
Multifamily Housing in California, CA · 600 J Street, Martinez · 94553
At a glance
Regency Plaza Apartments is a 67,242-square-foot multifamily housing building at 600 J Street, Martinez in Martinez, California, built in 1990. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 99 out of 100 (grade A), a site energy-use intensity of 41.9 kBtu/ft² and 155 tCO₂e of greenhouse-gas emissions. That score is higher than 71% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 99 (band A) |
| Site EUI | 41.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 155 tCO₂e |
| GHG intensity | 2.3 kgCO₂e/ft² |
| Electricity | 374,220 kWh |
| Natural gas | 13,164 therms |
| Gross floor area | 67,242 sq ft |
| Source record | california:26767975:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 99 | +3 | 41.9 kBtu/ft² | 155 tCO₂e |
| 2023 | 96 | -1 | 45.2 kBtu/ft² | 178 tCO₂e |
| 2022 | 97 | 44.4 kBtu/ft² | 177 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
- 600 J Street, Martinez
- City
- California
- State
- California
- ZIP
- 94553
- Coordinates
- 37.99649, -122.13152
Within ~1 km
Nearby benchmarked buildings
- Alhambra High Schoolscore 85
K-12 School · 148,148 sq ft
- Martinez Hillside-Gk Mgtscore 95
Multifamily Housing · 65,786 sq ft
- Ridgecrest-Sequoiascore 94
Multifamily Housing · 63,611 sq ft
- Martinezscore —
Self-Storage Facility · 59,273 sq ft
See also: most efficient in California · biggest emitters
How does Regency Plaza Apartments compare with other multifamily housing buildings in California?
The latest disclosures cover 10,630 multifamily housing buildings in California, out of 40,029 buildings citywide. Regency Plaza Apartments's ENERGY STAR score of 99 compares with an average of 82 across the 9,612 that report a score; it scores higher than 71% of them and lower than 24%. Its site EUI of 41.9 kBtu/ft² is about 22% above the average of 34.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 2.3 kgCO₂e/ft² is roughly in line with the group average of 2.1 kgCO₂e/ft².
At 67,242 sq ft, it is about 55% below the average floor area of 150,919 sq ft for those buildings. Its 1990 construction date is close to the group's average year built (1988). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Regency Plaza Apartments's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Regency Plaza Apartments, covering report years 2022–2024. Its ENERGY STAR score went from 97 in 2022 to 99 in 2024 (+2 points). Site EUI moved from 44.4 kBtu/ft² (2022) to 41.9 kBtu/ft² (2024), a 6% decrease. Reported emissions went from 177 tCO₂e to 155 tCO₂e over the same span (down 13%).
What does an ENERGY STAR score of 99 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 99 means the building performs better than about 99% of its national peers. BuildingCensus bands the score into report-card grades; 99 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 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. Regency Plaza Apartments's 41.9 kBtu/ft² across 67,242 sq ft works out to about 2.8 billion Btu (826 MWh-equivalent) in 2024. The disclosure also reports 374,220 kWh of electricity and 13,164 therms of natural gas for the year.
Which law requires Regency Plaza Apartments to report its energy use?
Regency Plaza Apartments 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:26767975:2024). 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 multifamily housing buildings in California
- Atrium Downtown - Sequoia Equities· 67,216 sq ft · score 83 (B)
- El Presidio· 67,202 sq ft · score 100 (A)
- Ridgestone· 67,200 sq ft · score 100 (A)
- 14411 Kittridge St· 67,161 sq ft · score 95 (A)
- 556 - Vintage Chateau Ii· 67,160 sq ft · score 98 (A)
- 208 S Bonnie Brae St· 67,158 sq ft · score 86 (A)
- Multifamily Housing buildings in California· 10,630 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 Regency Plaza Apartments's energy grade?
Regency Plaza Apartments scores 99 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Regency Plaza Apartments use?
Its 2024 site energy-use intensity was 41.9 kBtu/ft² across 67,242 sq ft, including 374,220 kWh of electricity and 13,164 therms of natural gas.
What are Regency Plaza Apartments's carbon emissions?
Regency Plaza Apartments reported 155 tCO₂e of greenhouse-gas emissions (2.3 kgCO₂e/ft²) for 2024.
Where is Regency Plaza Apartments?
Regency Plaza Apartments is at 600 J Street, Martinez, in Martinez, California 94553. Its coordinates are 37.99649, -122.13152 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Regency Plaza Apartments and when was it built?
Regency Plaza Apartments has 67,242 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1990 as its year built. It is classed as multifamily housing.
Is Regency Plaza Apartments 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, “Regency Plaza Apartments, Martinez, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/regency-plaza-apartments-5418eec9 (data as of July 9, 2026).