Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn
Non-Refrigerated Warehouse in California, CA · 15500 Blackburn Avenue, Norwalk · 90650
At a glance
Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn is a 72,000-square-foot non-refrigerated warehouse at 15500 Blackburn Avenue, Norwalk in Norwalk, California, built in 1975. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 54 out of 100 (grade D), a site energy-use intensity of 12.9 kBtu/ft² and 60 tCO₂e of greenhouse-gas emissions. That score is higher than 28% of the 2,227 scored non-refrigerated warehouse buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 54 (band D) |
| Site EUI | 12.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 60 tCO₂e |
| GHG intensity | 0.8 kgCO₂e/ft² |
| Electricity | 259,071 kWh |
| Natural gas | 287 therms |
| Gross floor area | 72,000 sq ft |
| Source record | california:20474475:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 54 | +2 | 12.9 kBtu/ft² | 60 tCO₂e |
| 2023 | 52 | -7 | 12.0 kBtu/ft² | 61 tCO₂e |
| 2022 | 59 | 12.5 kBtu/ft² | 63 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
- 15500 Blackburn Avenue, Norwalk
- City
- California
- State
- California
- ZIP
- 90650
- Coordinates
- 33.89043, -118.05806
Within ~1 km
Nearby benchmarked buildings
- Goodman Gateway Santa Fe Springsscore 98
Non-Refrigerated Warehouse · 989,809 sq ft
- Ups Cerritos Cacerscore 10
Distribution Center · 421,690 sq ft
- Mid-Counties Business Park-Bscore 88
Distribution Center · 352,466 sq ft
- Z058810-13012 Molette Stscore 91
Non-Refrigerated Warehouse · 306,286 sq ft
- Br46389-Odonnell Cerr. Iii-16030score 89
Non-Refrigerated Warehouse · 290,000 sq ft
Non-Refrigerated Warehouse · 281,766 sq ft
See also: most efficient in California · biggest emitters
How does Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn compare with other non-refrigerated warehouse buildings in California?
The latest disclosures cover 2,867 non-refrigerated warehouse buildings in California, out of 40,029 buildings citywide. Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn's ENERGY STAR score of 54 compares with an average of 68 across the 2,227 that report a score; it scores higher than 28% of them and lower than 72%. Its site EUI of 12.9 kBtu/ft² is about 41% below the average of 21.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.8 kgCO₂e/ft² is about 40% below the group average of 1.4 kgCO₂e/ft².
At 72,000 sq ft, it is about 59% below the average floor area of 173,929 sq ft for those buildings. It was built in 1975, 13 years earlier than the group's average year built (1988). Across all 24 jurisdictions BuildingCensus covers, the 4,723 non-refrigerated warehouse buildings average an ENERGY STAR score of 66 and a site EUI of 26.0 kBtu/ft².
How has Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn, covering report years 2022–2024. Its ENERGY STAR score went from 59 in 2022 to 54 in 2024 (-5 points); its best year on file was 2022, at 59. Site EUI moved from 12.5 kBtu/ft² (2022) to 12.9 kBtu/ft² (2024), an 3% increase. Reported emissions went from 63 tCO₂e to 60 tCO₂e over the same span (down 4%).
What does an ENERGY STAR score of 54 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 54 means the building performs better than about 54% of its national peers. BuildingCensus bands the score into report-card grades; 54 falls in band D — lowest band (1–54). It sits 21 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. Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn's 12.9 kBtu/ft² across 72,000 sq ft works out to about 0.9 billion Btu (272 MWh-equivalent) in 2024. The disclosure also reports 259,071 kWh of electricity and 287 therms of natural gas for the year.
Which law requires Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn to report its energy use?
Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn 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:20474475:2024). 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 non-refrigerated warehouse buildings in California
- Br42291-1341 N Market Blvd· 71,997 sq ft · score 88 (A)
- Apg Ocic Llc - 3401· 71,953 sq ft · score 1 (D)
- Bvthom.2 - 3500-3520 Thomas Road (Bv)· 71,910 sq ft · score 100 (A)
- 5874 Brisa Street· 71,888 sq ft · score 91 (A)
- Apg Victoria Llc - 19440· 71,868 sq ft · score 78 (B)
- Br46484-Benicia Cmrce.Ctr Ii-6300-6330· 71,860 sq ft · score 100 (A)
- Non-Refrigerated Warehouse buildings in California· 2,867 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 Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn's energy grade?
Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn scores 54 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn use?
Its 2024 site energy-use intensity was 12.9 kBtu/ft² across 72,000 sq ft, including 259,071 kWh of electricity and 287 therms of natural gas.
What are Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn's carbon emissions?
Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn reported 60 tCO₂e of greenhouse-gas emissions (0.8 kgCO₂e/ft²) for 2024.
Where is Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn?
Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn is at 15500 Blackburn Avenue, Norwalk, in Norwalk, California 90650. Its coordinates are 33.89043, -118.05806 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn and when was it built?
Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn has 72,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1975 as its year built. It is classed as non-refrigerated warehouse.
Is Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn 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).
Working with California building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Z436412-Norwalk Bldg. 5 - 15500-15510 Blackburn, Norwalk, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/z436412-norwalk-bldg-5-15500-15510-blackburn-a2001359 (data as of July 9, 2026).