Heron Building
Office in California, CA · 510 West 6Th Street, Los Angeles · 90014
At a glance
Heron Building is a 236,758-square-foot office building at 510 West 6Th Street, Los Angeles in Los Angeles, California, built in 1925. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 88 out of 100 (grade A), a site energy-use intensity of 25.4 kBtu/ft² and 393 tCO₂e of greenhouse-gas emissions. That score is higher than 59% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 88 (band A) |
| Site EUI | 25.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 393 tCO₂e |
| GHG intensity | 1.7 kgCO₂e/ft² |
| Electricity | 1,674,120 kWh |
| Gross floor area | 236,758 sq ft |
| Source record | california:5898703:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 88 | ±0 | 25.4 kBtu/ft² | 393 tCO₂e |
| 2023 | 88 | ±0 | 28.1 kBtu/ft² | 460 tCO₂e |
| 2022 | 88 | ±0 | 27.7 kBtu/ft² | 440 tCO₂e |
| 2021 | 88 | +1 | 28.5 kBtu/ft² | 399 tCO₂e |
| 2020 | 87 | +4 | 29.5 kBtu/ft² | 461 tCO₂e |
| 2019 | 83 | +7 | 36.8 kBtu/ft² | 602 tCO₂e |
| 2018 | 76 | 42.1 kBtu/ft² | 700 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
- 510 West 6Th Street, Los Angeles
- City
- California
- State
- California
- ZIP
- 90014
- Coordinates
- 34.04814, -118.25490
Within ~1 km
Nearby benchmarked buildings
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- California Market Centerscore —
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- 110 East 9Th Stscore 100
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Mixed Use Property · 1,735,721 sq ft
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See also: most efficient in California · biggest emitters
How does Heron Building compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Heron Building's ENERGY STAR score of 88 compares with an average of 75 across the 4,912 that report a score; it scores higher than 59% of them and lower than 39%. Its site EUI of 25.4 kBtu/ft² is about half of the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.7 kgCO₂e/ft² is about half of the group average of 3.6 kgCO₂e/ft².
At 236,758 sq ft, it is about 56% above the average floor area of 151,937 sq ft for those buildings. It was built in 1925, 60 years earlier than the group's average year built (1985). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has Heron Building's energy performance changed over time?
BuildingCensus holds 7 California disclosures for Heron Building, covering report years 2018–2024. Its ENERGY STAR score went from 76 in 2018 to 88 in 2024 (+12 points); its best year on file was 2021, at 88. Site EUI moved from 42.1 kBtu/ft² (2018) to 25.4 kBtu/ft² (2024), a 40% decrease. Reported emissions went from 700 tCO₂e to 393 tCO₂e over the same span (down 44%).
What does an ENERGY STAR score of 88 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 88 means the building performs better than about 88% of its national peers. BuildingCensus bands the score into report-card grades; 88 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. Heron Building's 25.4 kBtu/ft² across 236,758 sq ft works out to about 6 billion Btu (1,762 MWh-equivalent) in 2024. The disclosure also reports 1,674,120 kWh of electricity for the year.
Which law requires Heron Building to report its energy use?
Heron Building 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:5898703:2024). 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 office buildings in California
- Omninet Hamilton Lp· 236,599 sq ft · score 82 (B)
- Towers Emeryville - Tower 2 (2200)· 236,592 sq ft · score 78 (B)
- Pinnacle Ii· 236,414 sq ft · EUI 6.8 kBtu/ft²
- Fullerton Towers· 236,295 sq ft · EUI 30.9 kBtu/ft²
- Hq @ 1St - 130 B· 236,040 sq ft · EUI 77.3 kBtu/ft²
- 1 Park Plaza· 235,925 sq ft · score 80 (B)
- Office buildings in California· 6,214 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 Heron Building's energy grade?
Heron Building scores 88 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 Heron Building use?
Its 2024 site energy-use intensity was 25.4 kBtu/ft² across 236,758 sq ft, including 1,674,120 kWh of electricity.
What are Heron Building's carbon emissions?
Heron Building reported 393 tCO₂e of greenhouse-gas emissions (1.7 kgCO₂e/ft²) for 2024.
Where is Heron Building?
Heron Building is at 510 West 6Th Street, Los Angeles, in Los Angeles, California 90014. Its coordinates are 34.04814, -118.25490 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Heron Building and when was it built?
Heron Building has 236,758 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1925 as its year built. It is classed as office.
Is Heron Building 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, “Heron Building, Los Angeles, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/heron-building-b6f9b989 (data as of July 9, 2026).