Ilima West
Multifamily Housing in Honolulu, HI · 3121 Ala Ilima St, Honolulu
At a glance
Ilima West is a 64,064-square-foot multifamily housing building at 3121 Ala Ilima St, Honolulu in Honolulu, Hawaii, built in 1972. In its 2025 Honolulu benchmarking disclosure it reported a site energy-use intensity of 23.9 kBtu/ft² and 280 tCO₂e of greenhouse-gas emissions.
Ordinance 22-17 (City & County of Honolulu) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 23.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 280 tCO₂e |
| GHG intensity | — |
| Electricity | 399,704 kWh |
| Natural gas | 1,645 therms |
| Water use | 4,755 kgal |
| Gross floor area | 64,064 sq ft |
| Source record | honolulu:04QFJ1313760644:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 23.9 kBtu/ft² | 280 tCO₂e | |
| 2024 | 100 | 24.3 kBtu/ft² | 286 tCO₂e |
Compliance context
Ordinance 22-17 (City & County of Honolulu)
Honolulu's Ordinance 22-17 requires commercial buildings over 25,000 sq ft on Oʻahu to benchmark annually, with public disclosure of results.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 3121 Ala Ilima St, Honolulu
- City
- Honolulu
- State
- Hawaii
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Honolulu · biggest emitters
How does Ilima West compare with other multifamily housing buildings in Honolulu?
The latest disclosures cover 378 multifamily housing buildings in Honolulu, out of 799 buildings citywide. Its site EUI of 23.9 kBtu/ft² is about 15% below the average of 28.2 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 64,064 sq ft, it is about 60% below the average floor area of 159,294 sq ft for those buildings. It was built in 1972, 7 years earlier than the group's average year built (1979). 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 Ilima West's energy performance changed over time?
BuildingCensus holds 2 Honolulu disclosures for Ilima West, covering report years 2024–2025. Site EUI moved from 24.3 kBtu/ft² (2024) to 23.9 kBtu/ft² (2025), a 2% decrease. Reported emissions went from 286 tCO₂e to 280 tCO₂e over the same span (down 2%).
What does a site EUI of 23.9 kBtu/ft² mean?
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. Ilima West's 23.9 kBtu/ft² across 64,064 sq ft works out to about 1.5 billion Btu (449 MWh-equivalent) in 2025. The disclosure also reports 399,704 kWh of electricity, 1,645 therms of natural gas and 4,755 thousand gallons of water for the year.
Which law requires Ilima West to report its energy use?
Ilima West reports under Ordinance 22-17 (City & County of Honolulu), the legal basis of Honolulu's Better Buildings Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record honolulu:04QFJ1313760644:2025). Honolulu's Ordinance 22-17 requires commercial buildings over 25,000 sq ft on Oʻahu to benchmark annually, with public disclosure of results.
More multifamily housing buildings in Honolulu
- Wiliwili Vistas· 64,000 sq ft · EUI 24.1 kBtu/ft²
- AOAO The Sovereign Condominium Apartments, Inc.· 63,586 sq ft · EUI 27.5 kBtu/ft²
- Lakeside Manor· 62,656 sq ft · EUI 34.6 kBtu/ft²
- Royal Vista AOAO· 62,392 sq ft · EUI 23.3 kBtu/ft²
- Jason Apartments· 62,054 sq ft · EUI 8.5 kBtu/ft²
- Hale Luana· 62,000 sq ft · EUI 18.6 kBtu/ft²
- Multifamily Housing buildings in Honolulu· 378 benchmarked
- All Honolulu benchmarked buildings· Ordinance 22-17 (City & County of Honolulu)
- Most efficient large buildings in Honolulu
- Least efficient large buildings in Honolulu
- Biggest emitters in Honolulu
Frequently asked questions
What is Ilima West's energy grade?
Ilima West did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 23.9 kBtu/ft².
How much energy does Ilima West use?
Its 2025 site energy-use intensity was 23.9 kBtu/ft² across 64,064 sq ft, including 399,704 kWh of electricity and 1,645 therms of natural gas.
What are Ilima West's carbon emissions?
Ilima West reported 280 tCO₂e of greenhouse-gas emissions for 2025.
Where is Ilima West?
Ilima West is at 3121 Ala Ilima St, Honolulu, in Honolulu, Hawaii.
How big is Ilima West and when was it built?
Ilima West has 64,064 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1972 as its year built. It is classed as multifamily housing.
Is Ilima West covered by Ordinance 22-17 (City & County of Honolulu)?
Yes — it appears in the 2025 Better Buildings Benchmarking disclosure, which lists the buildings reporting under Ordinance 22-17 (City & County of Honolulu).
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About this data
Source: Better Buildings Benchmarking (Ordinance 22-17 (City & County of Honolulu)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Ilima West, Honolulu, Hawaii — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/honolulu/ilima-west-f5831018 (data as of July 9, 2026).