Plaza At Mililani
Senior Living Community in Honolulu, HI · 95-1050 Ukuwai St, Mililani
At a glance
Plaza At Mililani is a 68,802-square-foot senior living community building at 95-1050 Ukuwai St, Mililani in Honolulu, Hawaii, built in 2009. In its 2025 Honolulu benchmarking disclosure it reported a site energy-use intensity of 36.4 kBtu/ft² and 500 tCO₂e of greenhouse-gas emissions.
Ordinance 22-17 (City & County of Honolulu) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 36.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 500 tCO₂e |
| GHG intensity | — |
| Electricity | 734,980 kWh |
| Water use | 4,397 kgal |
| Gross floor area | 68,802 sq ft |
| Source record | honolulu:04QFJ0303674588:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 36.4 kBtu/ft² | 500 tCO₂e | |
| 2024 | 100 | 37.4 kBtu/ft² | 562 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
- 95-1050 Ukuwai St, Mililani
- 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 Plaza At Mililani compare with other senior living community buildings in Honolulu?
The latest disclosures cover 12 senior living community buildings in Honolulu, out of 799 buildings citywide. Its site EUI of 36.4 kBtu/ft² is roughly in line with the average of 38.2 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 68,802 sq ft, it is about 60% below the average floor area of 171,938 sq ft for those buildings. Its 2009 construction date is close to the group's average year built (2007). Across all 24 jurisdictions BuildingCensus covers, the 1,181 senior living community buildings average an ENERGY STAR score of 71 and a site EUI of 73.6 kBtu/ft².
How has Plaza At Mililani's energy performance changed over time?
BuildingCensus holds 2 Honolulu disclosures for Plaza At Mililani, covering report years 2024–2025. Site EUI moved from 37.4 kBtu/ft² (2024) to 36.4 kBtu/ft² (2025), a 3% decrease. Reported emissions went from 562 tCO₂e to 500 tCO₂e over the same span (down 11%).
What does a site EUI of 36.4 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. Plaza At Mililani's 36.4 kBtu/ft² across 68,802 sq ft works out to about 2.5 billion Btu (734 MWh-equivalent) in 2025. The disclosure also reports 734,980 kWh of electricity and 4,397 thousand gallons of water for the year.
Which law requires Plaza At Mililani to report its energy use?
Plaza At Mililani 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:04QFJ0303674588:2025). Honolulu's Ordinance 22-17 requires commercial buildings over 25,000 sq ft on Oʻahu to benchmark annually, with public disclosure of results.
More senior living community buildings in Honolulu
Frequently asked questions
What is Plaza At Mililani's energy grade?
Plaza At Mililani did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 36.4 kBtu/ft².
How much energy does Plaza At Mililani use?
Its 2025 site energy-use intensity was 36.4 kBtu/ft² across 68,802 sq ft, including 734,980 kWh of electricity.
What are Plaza At Mililani's carbon emissions?
Plaza At Mililani reported 500 tCO₂e of greenhouse-gas emissions for 2025.
Where is Plaza At Mililani?
Plaza At Mililani is at 95-1050 Ukuwai St, Mililani, in Honolulu, Hawaii.
How big is Plaza At Mililani and when was it built?
Plaza At Mililani has 68,802 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2009 as its year built. It is classed as senior living community.
Is Plaza At Mililani 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, “Plaza At Mililani, Honolulu, Hawaii — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/honolulu/plaza-at-mililani-634aca27 (data as of July 9, 2026).