At a glance
Ross Island Plaza (352) is a 32,854-square-foot office building at 3880 SE 8TH AVE in Portland, Oregon, built in 1969. In its 2024 Portland benchmarking disclosure it reported an ENERGY STAR score of 73 out of 100 (grade B), a site energy-use intensity of 38.0 kBtu/ft² and 117 tCO₂e of greenhouse-gas emissions. That score is higher than 34% of the 256 scored office buildings in Portland.
Commercial Building Energy Performance Reporting Policy · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 73 (band B) |
| Site EUI | 38.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 117 tCO₂e |
| GHG intensity | — |
| Electricity | 365,580 kWh |
| Gross floor area | 32,854 sq ft |
| Source record | portland_or:1S1E11CB-7700-B1:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 73 | -3 | 38.0 kBtu/ft² | 117 tCO₂e |
| 2023 | 76 | 36.4 kBtu/ft² | 103 tCO₂e |
Compliance context
Commercial Building Energy Performance Reporting Policy
Portland requires commercial buildings over 20,000 sq ft to report energy performance annually, with civil penalties for buildings that fail to comply.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 3880 SE 8TH AVE
- City
- Portland
- State
- Oregon
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Portland · biggest emitters
How does Ross Island Plaza (352) compare with other office buildings in Portland?
The latest disclosures cover 335 office buildings in Portland, out of 952 buildings citywide. Ross Island Plaza (352)'s ENERGY STAR score of 73 compares with an average of 76 across the 256 that report a score; it scores higher than 34% of them and lower than 65%. Its site EUI of 38.0 kBtu/ft² is about 20% below the average of 47.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 32,854 sq ft, it is about 67% below the average floor area of 100,908 sq ft for those buildings. It was built in 1969, 12 years later than the group's average year built (1957). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has Ross Island Plaza (352)'s energy performance changed over time?
BuildingCensus holds 2 Portland disclosures for Ross Island Plaza (352), covering report years 2023–2024. Its ENERGY STAR score went from 76 in 2023 to 73 in 2024 (-3 points); its best year on file was 2023, at 76. Site EUI moved from 36.4 kBtu/ft² (2023) to 38.0 kBtu/ft² (2024), an 4% increase. Reported emissions went from 103 tCO₂e to 117 tCO₂e over the same span (up 14%).
What does an ENERGY STAR score of 73 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 73 means the building performs better than about 73% of its national peers. BuildingCensus bands the score into report-card grades; 73 falls in band B — above median (70–84). It sits 2 points below 75, the threshold for ENERGY STAR certification. In Portland, 66% 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. Ross Island Plaza (352)'s 38.0 kBtu/ft² across 32,854 sq ft works out to about 1.2 billion Btu (366 MWh-equivalent) in 2024. The disclosure also reports 365,580 kWh of electricity for the year.
Which law requires Ross Island Plaza (352) to report its energy use?
Ross Island Plaza (352) reports under the Commercial Building Energy Performance Reporting Policy, the legal basis of Portland's Commercial Building Energy Reporting program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record portland_or:1S1E11CB-7700-B1:2024). Portland requires commercial buildings over 20,000 sq ft to report energy performance annually, with civil penalties for buildings that fail to comply.
More office buildings in Portland
- The Telegram Building· 32,841 sq ft · score 19 (D)
- Silica· 32,819 sq ft · score 93 (A)
- Oregon Plaza (831-841 NE 20TH AVE)· 32,708 sq ft · score 66 (C)
- Bindery Building· 32,616 sq ft · EUI 17.9 kBtu/ft²
- Tabor Square· 32,105 sq ft · score 72 (B)
- 1430 SW BROADWAY· 32,005 sq ft · EUI 32.9 kBtu/ft²
- Office buildings in Portland· 335 benchmarked
- All Portland benchmarked buildings· Commercial Building Energy Performance Reporting Policy
- Most efficient large buildings in Portland
- Least efficient large buildings in Portland
- Biggest emitters in Portland
Frequently asked questions
What is Ross Island Plaza (352)'s energy grade?
Ross Island Plaza (352) scores 73 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Portland disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Ross Island Plaza (352) use?
Its 2024 site energy-use intensity was 38.0 kBtu/ft² across 32,854 sq ft, including 365,580 kWh of electricity.
What are Ross Island Plaza (352)'s carbon emissions?
Ross Island Plaza (352) reported 117 tCO₂e of greenhouse-gas emissions for 2024.
Where is Ross Island Plaza (352)?
Ross Island Plaza (352) is at 3880 SE 8TH AVE, in Portland, Oregon.
How big is Ross Island Plaza (352) and when was it built?
Ross Island Plaza (352) has 32,854 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1969 as its year built. It is classed as office.
Is Ross Island Plaza (352) covered by the Commercial Building Energy Performance Reporting Policy?
Yes — it appears in the 2024 Commercial Building Energy Reporting disclosure, which lists the buildings reporting under the Commercial Building Energy Performance Reporting Policy.
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About this data
Source: Commercial Building Energy Reporting (Commercial Building Energy Performance Reporting Policy), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Ross Island Plaza (352), Portland, Oregon — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/portland/ross-island-plaza-352-f1564e9f (data as of July 9, 2026).