9151 MASON AVE
Non-Refrigerated Warehouse in Los Angeles, CA · 91311
At a glance
9151 MASON AVE is a 154,456-square-foot non-refrigerated warehouse in Los Angeles, California, built in 1970. It is listed in the 2025 Existing Buildings Energy & Water Efficiency (EBEWE) 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 2024, when it scored 99 out of 100 on ENERGY STAR with a site EUI of 4.5 kBtu/ft².
No energy data reported for 2025
9151 MASON AVE appears in the 2025 Existing Buildings Energy & Water Efficiency (EBEWE) 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: 154,456 sq ft · Built 1970
Source record la:385971909116:2025
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | 99 | 4.5 kBtu/ft² | 46 tCO₂e | |
| 2023 | — | — | — | |
| 2022 | — | — | — | |
| 2021 | — | — | — | |
| 2020 | 100 | ±0 | 2.4 kBtu/ft² | 22 tCO₂e |
| 2019 | 100 | 2.7 kBtu/ft² | 28 tCO₂e | |
| 2018 | — | — | — | |
| 2017 | — | — | — |
Compliance context
LA Municipal Code Div. 97, §91.9701 (EBEWE)
EBEWE requires annual benchmarking plus audits/retro-commissioning every five years for privately owned buildings of 20,000 sq ft or more; non-compliance carries a $202 fee (LAMC §91.9712) plus possible late fees.
Ownership
Amir Development Co
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 9151 MASON AVE
- City
- Los Angeles
- State
- California
- ZIP
- 91311
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Los Angeles · biggest emitters
How has 9151 MASON AVE's energy performance changed over time?
BuildingCensus holds 9 Los Angeles disclosures for 9151 MASON AVE, covering report years 2017–2025. Its ENERGY STAR score went from 100 in 2019 to 99 in 2024 (-1 points); its best year on file was 2019, at 100. Site EUI moved from 2.7 kBtu/ft² (2019) to 4.5 kBtu/ft² (2024), an 67% increase. Reported emissions went from 28 tCO₂e to 46 tCO₂e over the same span (up 65%).
Which law requires 9151 MASON AVE to report its energy use?
9151 MASON AVE reports under LA Municipal Code Div. 97, §91.9701 (EBEWE), the legal basis of Los Angeles's Existing Buildings Energy & Water Efficiency (EBEWE) program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record la:385971909116:2025). EBEWE requires annual benchmarking plus audits/retro-commissioning every five years for privately owned buildings of 20,000 sq ft or more; non-compliance carries a $202 fee (LAMC §91.9712) plus possible late fees.
More non-refrigerated warehouse buildings in Los Angeles
- 5375 W SAN FERNANDO RD· 154,384 sq ft · score 77 (B)
- 931 E PICO BLVD· 152,469 sq ft · score 97 (A)
- 5761 W IMPERIAL HWY· 141,737 sq ft · score 100 (A)
- 1815 S SOTO ST· 140,565 sq ft · score 60 (C)
- 8300 SAN FERNANDO RD· 138,500 sq ft · score 78 (B)
- 11350 SHERMAN WAY· 135,000 sq ft · score 100 (A)
- Non-Refrigerated Warehouse buildings in Los Angeles· 392 benchmarked
- All Los Angeles benchmarked buildings· LA Municipal Code Div. 97, §91.9701 (EBEWE)
- Most efficient large buildings in Los Angeles
- Least efficient large buildings in Los Angeles
- Biggest emitters in Los Angeles
Frequently asked questions
What is 9151 MASON AVE's energy grade?
9151 MASON AVE has no grade: it did not report energy data for 2025. The 2025 Existing Buildings Energy & Water Efficiency (EBEWE) disclosure lists the building but publishes no ENERGY STAR score, energy use or emissions for it.
Where is 9151 MASON AVE?
9151 MASON AVE is in Los Angeles, California 91311.
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About this data
Source: Existing Buildings Energy & Water Efficiency (EBEWE) (LA Municipal Code Div. 97, §91.9701 (EBEWE)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “9151 MASON AVE, Los Angeles, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/los-angeles/9151-mason-ave-26a352a4 (data as of October 2, 2026).