18520 PRAIRIE ST
Multifamily Housing in Los Angeles, CA · 91324
At a glance
18520 PRAIRIE ST is a 21,080-square-foot multifamily housing building in Los Angeles, California, built in 1970. In its 2025 Los Angeles benchmarking disclosure it reported an ENERGY STAR score of 47 out of 100 (grade D), a site energy-use intensity of 67.9 kBtu/ft² and 78 tCO₂e of greenhouse-gas emissions. That score is higher than 9% 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 | 47 (band D) |
| Site EUI | 67.9 kBtu/ft² |
| Source EUI | 107.1 kBtu/ft² |
| GHG emissions | 78 tCO₂e |
| GHG intensity | — |
| Water use | 1,108 kgal |
| Gross floor area | 21,080 sq ft |
| Source record | la:399348909603:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 47 | ±0 | 67.9 kBtu/ft² | 78 tCO₂e |
| 2024 | 47 | +40 | 71.9 kBtu/ft² | 86 tCO₂e |
| 2023 | 7 | -4 | 89.5 kBtu/ft² | 113 tCO₂e |
| 2022 | 11 | +5 | 83.5 kBtu/ft² | 105 tCO₂e |
| 2021 | 6 | -9 | 90.5 kBtu/ft² | 113 tCO₂e |
| 2020 | 15 | +5 | 88.3 kBtu/ft² | 109 tCO₂e |
| 2019 | 10 | +4 | 85.6 kBtu/ft² | 101 tCO₂e |
| 2018 | 6 | 94.4 kBtu/ft² | 117 tCO₂e |
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
MDS Property Management
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Location
- Address
- 18520 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 18520 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. 18520 PRAIRIE ST's ENERGY STAR score of 47 compares with an average of 78 across the 3,344 that report a score; it scores higher than 9% of them and lower than 90%. Its site EUI of 67.9 kBtu/ft² is about 83% above the average of 37.2 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 21,080 sq ft, it is about 65% below the average floor area of 60,540 sq ft for those buildings. It was built in 1970, 5 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 18520 PRAIRIE ST's energy performance changed over time?
BuildingCensus holds 8 Los Angeles disclosures for 18520 PRAIRIE ST, covering report years 2018–2025. Its ENERGY STAR score went from 6 in 2018 to 47 in 2025 (+41 points); its best year on file was 2024, at 47. Site EUI moved from 94.4 kBtu/ft² (2018) to 67.9 kBtu/ft² (2025), a 28% decrease. Reported emissions went from 117 tCO₂e to 78 tCO₂e over the same span (down 34%).
What does an ENERGY STAR score of 47 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 47 means the building performs better than about 47% of its national peers. BuildingCensus bands the score into report-card grades; 47 falls in band D — lowest band (1–54). It sits 28 points below 75, the threshold for ENERGY STAR certification. 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. 18520 PRAIRIE ST's 67.9 kBtu/ft² across 21,080 sq ft works out to about 1.4 billion Btu (419 MWh-equivalent) in 2025. Its source EUI of 107.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,108 thousand gallons of water for the year.
Which law requires 18520 PRAIRIE ST to report its energy use?
18520 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:399348909603:2025). 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
- 12534 ROSCOE BLVD· 21,074 sq ft · score 72 (B)
- 20954 VANOWEN ST· 21,063 sq ft · score 60 (C)
- 115 N WETHERLY DR· 21,060 sq ft · EUI 31.2 kBtu/ft²
- 3344 S CANFIELD AVE· 21,060 sq ft · score 63 (C)
- 10101 DE SOTO AVE· 21,036 sq ft · score 40 (D)
- 447 S GRAND VIEW ST· 21,036 sq ft · score 99 (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 18520 PRAIRIE ST's energy grade?
18520 PRAIRIE ST scores 47 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2025 Los Angeles disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 18520 PRAIRIE ST use?
Its 2025 site energy-use intensity was 67.9 kBtu/ft² (107.1 kBtu/ft² source) across 21,080 sq ft.
What are 18520 PRAIRIE ST's carbon emissions?
18520 PRAIRIE ST reported 78 tCO₂e of greenhouse-gas emissions for 2025.
Where is 18520 PRAIRIE ST?
18520 PRAIRIE ST is in Los Angeles, California 91324.
How big is 18520 PRAIRIE ST and when was it built?
18520 PRAIRIE ST has 21,080 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1970 as its year built. It is classed as multifamily housing.
Is 18520 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, “18520 PRAIRIE ST, Los Angeles, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/los-angeles/18520-prairie-st-2b2038a4 (data as of October 2, 2026).