Swansea Park Phase 2 (Sw047)
Multifamily Housing in California, CA · 5151 Romaine St, Los Angeles · 90029
At a glance
Swansea Park Phase 2 (Sw047) is a 51,880-square-foot multifamily housing building at 5151 Romaine St, Los Angeles in Los Angeles, California, built in 2020. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A), a site energy-use intensity of 30.7 kBtu/ft² and 98 tCO₂e of greenhouse-gas emissions. That score is higher than 63% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 97 (band A) |
| Site EUI | 30.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 98 tCO₂e |
| GHG intensity | 1.9 kgCO₂e/ft² |
| Electricity | 274,741 kWh |
| Natural gas | 6,729 therms |
| Gross floor area | 51,880 sq ft |
| Source record | california:31482222:2024 |
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.
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Location
- Address
- 5151 Romaine St, Los Angeles
- City
- California
- State
- California
- ZIP
- 90029
- Coordinates
- 34.08880, -118.30391
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Swansea Park Phase 2 (Sw047) compare with other multifamily housing buildings in California?
The latest disclosures cover 10,630 multifamily housing buildings in California, out of 40,029 buildings citywide. Swansea Park Phase 2 (Sw047)'s ENERGY STAR score of 97 compares with an average of 82 across the 9,612 that report a score; it scores higher than 63% of them and lower than 34%. Its site EUI of 30.7 kBtu/ft² is about 11% below the average of 34.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.9 kgCO₂e/ft² is about 10% below the group average of 2.1 kgCO₂e/ft².
At 51,880 sq ft, it is about 66% below the average floor area of 150,919 sq ft for those buildings. It was built in 2020, 32 years later than the group's average year built (1988). 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.
What does an ENERGY STAR score of 97 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 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 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. Swansea Park Phase 2 (Sw047)'s 30.7 kBtu/ft² across 51,880 sq ft works out to about 1.6 billion Btu (467 MWh-equivalent) in 2024. The disclosure also reports 274,741 kWh of electricity and 6,729 therms of natural gas for the year.
Which law requires Swansea Park Phase 2 (Sw047) to report its energy use?
Swansea Park Phase 2 (Sw047) 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:31482222:2024). 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 multifamily housing buildings in California
- 12320 Burbank Blvd. (2019)· 51,872 sq ft · score 100 (A)
- 12320 Burbank Blvd - 12320 Burbank Blvd. Valley Village· 51,872 sq ft · score 91 (A)
- 1590 West Palm Lane - Ab802· 51,872 sq ft · score 47 (D)
- 131 S Burlington Ave· 51,870 sq ft · score 85 (A)
- 77 Paloma Ave· 51,861 sq ft · score 100 (A)
- 4096 17Th Street· 51,856 sq ft · score 81 (B)
- Multifamily Housing buildings in California· 10,630 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 Swansea Park Phase 2 (Sw047)'s energy grade?
Swansea Park Phase 2 (Sw047) scores 97 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 Swansea Park Phase 2 (Sw047) use?
Its 2024 site energy-use intensity was 30.7 kBtu/ft² across 51,880 sq ft, including 274,741 kWh of electricity and 6,729 therms of natural gas.
What are Swansea Park Phase 2 (Sw047)'s carbon emissions?
Swansea Park Phase 2 (Sw047) reported 98 tCO₂e of greenhouse-gas emissions (1.9 kgCO₂e/ft²) for 2024.
Where is Swansea Park Phase 2 (Sw047)?
Swansea Park Phase 2 (Sw047) is at 5151 Romaine St, Los Angeles, in Los Angeles, California 90029. Its coordinates are 34.08880, -118.30391 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Swansea Park Phase 2 (Sw047) and when was it built?
Swansea Park Phase 2 (Sw047) has 51,880 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2020 as its year built. It is classed as multifamily housing.
Is Swansea Park Phase 2 (Sw047) 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, “Swansea Park Phase 2 (Sw047), Los Angeles, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/swansea-park-phase-2-sw047-a14578d7 (data as of July 9, 2026).