At a glance
PDX Flatiron Building is a 22,107-square-foot office building at 3303 N MISSISSIPPI AVE in Portland, Oregon. In its 2024 Portland benchmarking disclosure it reported an ENERGY STAR score of 90 out of 100 (grade A), a site energy-use intensity of 24.1 kBtu/ft² and 78 tCO₂e of greenhouse-gas emissions. That score is higher than 63% of the 256 scored office buildings in Portland.
Commercial Building Energy Performance Reporting Policy · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 90 (band A) |
| Site EUI | 24.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 78 tCO₂e |
| GHG intensity | — |
| Electricity | 140,044 kWh |
| Natural gas | 556 therms |
| Gross floor area | 22,107 sq ft |
| Source record | portland_or:1N1E27BA-4500-B1:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 90 | 24.1 kBtu/ft² | 78 tCO₂e | |
| 2023 | — | — | — |
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
- 3303 N MISSISSIPPI 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 PDX Flatiron Building compare with other office buildings in Portland?
The latest disclosures cover 335 office buildings in Portland, out of 952 buildings citywide. PDX Flatiron Building's ENERGY STAR score of 90 compares with an average of 76 across the 256 that report a score; it scores higher than 63% of them and lower than 34%. Its site EUI of 24.1 kBtu/ft² is about half of the average of 47.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 22,107 sq ft, it is about 78% below the average floor area of 100,908 sq ft for those buildings. 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 PDX Flatiron Building's energy performance changed over time?
BuildingCensus holds 2 Portland disclosures for PDX Flatiron Building, covering report years 2023–2024. Only one of those years carries energy figures.
What does an ENERGY STAR score of 90 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 90 means the building performs better than about 90% of its national peers. BuildingCensus bands the score into report-card grades; 90 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 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. PDX Flatiron Building's 24.1 kBtu/ft² across 22,107 sq ft works out to about 0.5 billion Btu (156 MWh-equivalent) in 2024. The disclosure also reports 140,044 kWh of electricity and 556 therms of natural gas for the year.
Which law requires PDX Flatiron Building to report its energy use?
PDX Flatiron Building 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:1N1E27BA-4500-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
- 208 Building· 21,878 sq ft · EUI 48.6 kBtu/ft²
- BP John Building· 21,856 sq ft · EUI 45.6 kBtu/ft²
- A.F. Gray Administrative Building· 21,736 sq ft · EUI 62.6 kBtu/ft²
- 3330 NW YEON AVE· 21,512 sq ft · score 86 (A)
- Bradshaw Building· 21,500 sq ft · EUI 25.0 kBtu/ft²
- Lincoln Building· 21,500 sq ft · score 47 (D)
- 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 PDX Flatiron Building's energy grade?
PDX Flatiron Building scores 90 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Portland disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does PDX Flatiron Building use?
Its 2024 site energy-use intensity was 24.1 kBtu/ft² across 22,107 sq ft, including 140,044 kWh of electricity and 556 therms of natural gas.
What are PDX Flatiron Building's carbon emissions?
PDX Flatiron Building reported 78 tCO₂e of greenhouse-gas emissions for 2024.
Where is PDX Flatiron Building?
PDX Flatiron Building is at 3303 N MISSISSIPPI AVE, in Portland, Oregon.
How big is PDX Flatiron Building and when was it built?
PDX Flatiron Building has 22,107 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as office.
Is PDX Flatiron Building 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, “PDX Flatiron Building, Portland, Oregon — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/portland/pdx-flatiron-building-822c90bd (data as of July 9, 2026).