18521 PRAIRIE ST
Multifamily Housing in Los Angeles, CA · 91324
At a glance
18521 PRAIRIE ST is a 23,128-square-foot multifamily housing building in Los Angeles, California, built in 1965. In its 2025 Los Angeles benchmarking disclosure it reported an ENERGY STAR score of 88 out of 100 (grade A), a site energy-use intensity of 33.5 kBtu/ft² and 43 tCO₂e of greenhouse-gas emissions. That score is higher than 55% of the 3,344 scored multifamily housing buildings in Los Angeles.
LA Municipal Code Div. 97, §91.9701 (EBEWE) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 88 (band A) |
| Site EUI | 33.5 kBtu/ft² |
| Source EUI | 65.3 kBtu/ft² |
| GHG emissions | 43 tCO₂e |
| GHG intensity | — |
| Water use | 1,593 kgal |
| Gross floor area | 23,128 sq ft |
| Source record | la:399355909890:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 88 | +8 | 33.5 kBtu/ft² | 43 tCO₂e |
| 2024 | 80 | 40.4 kBtu/ft² | 55 tCO₂e | |
| 2023 | — | — | — | |
| 2022 | — | — | — | |
| 2021 | — | — | — | |
| 2020 | — | — | — | |
| 2019 | — | — | — | |
| 2018 | — | — | — |
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
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Location
- Address
- 18521 PRAIRIE ST
- City
- Los Angeles
- State
- California
- ZIP
- 91324
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 does 18521 PRAIRIE ST compare with other multifamily housing buildings in Los Angeles?
The latest disclosures cover 3,538 multifamily housing buildings in Los Angeles, out of 11,498 buildings citywide. 18521 PRAIRIE ST's ENERGY STAR score of 88 compares with an average of 78 across the 3,344 that report a score; it scores higher than 55% of them and lower than 43%. Its site EUI of 33.5 kBtu/ft² is roughly in line with the average of 37.2 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 23,128 sq ft, it is about 62% below the average floor area of 60,540 sq ft for those buildings. It was built in 1965, 10 years earlier than the group's average year built (1975). 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 18521 PRAIRIE ST's energy performance changed over time?
BuildingCensus holds 8 Los Angeles disclosures for 18521 PRAIRIE ST, covering report years 2018–2025. Its ENERGY STAR score went from 80 in 2024 to 88 in 2025 (+8 points). Site EUI moved from 40.4 kBtu/ft² (2024) to 33.5 kBtu/ft² (2025), a 17% decrease. Reported emissions went from 55 tCO₂e to 43 tCO₂e over the same span (down 23%).
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 Los Angeles, 63% 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. 18521 PRAIRIE ST's 33.5 kBtu/ft² across 23,128 sq ft works out to about 0.8 billion Btu (227 MWh-equivalent) in 2025. Its source EUI of 65.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,593 thousand gallons of water for the year.
Which law requires 18521 PRAIRIE ST to report its energy use?
18521 PRAIRIE ST 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:399355909890:2025). 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 multifamily housing buildings in Los Angeles
- 20234 ROSCOE BLVD· 23,100 sq ft · score 100 (A)
- 407 S KENMORE AVE· 23,096 sq ft · score 89 (A)
- 732 S MANSFIELD AVE· 23,080 sq ft · score 100 (A)
- 10402 SCOVILLE AVE· 23,079 sq ft · score 56 (C)
- 8862 VAN NUYS BLVD· 23,074 sq ft · score 62 (C)
- 14024 OXNARD ST· 23,070 sq ft · score 95 (A)
- Multifamily Housing buildings in Los Angeles· 3,538 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 18521 PRAIRIE ST's energy grade?
18521 PRAIRIE ST scores 88 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Los Angeles disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 18521 PRAIRIE ST use?
Its 2025 site energy-use intensity was 33.5 kBtu/ft² (65.3 kBtu/ft² source) across 23,128 sq ft.
What are 18521 PRAIRIE ST's carbon emissions?
18521 PRAIRIE ST reported 43 tCO₂e of greenhouse-gas emissions for 2025.
Where is 18521 PRAIRIE ST?
18521 PRAIRIE ST is in Los Angeles, California 91324.
How big is 18521 PRAIRIE ST and when was it built?
18521 PRAIRIE ST has 23,128 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1965 as its year built. It is classed as multifamily housing.
Is 18521 PRAIRIE ST covered by LA Municipal Code Div. 97, §91.9701 (EBEWE)?
Yes — it appears in the 2025 Existing Buildings Energy & Water Efficiency (EBEWE) disclosure, which lists the buildings reporting under LA Municipal Code Div. 97, §91.9701 (EBEWE).
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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, “18521 PRAIRIE ST, Los Angeles, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/los-angeles/18521-prairie-st-51722a77 (data as of October 2, 2026).