At a glance
23rd and Flanders is a 23,000-square-foot office building at 328 NW 23RD AVE in Portland, Oregon, built in 2005. In its 2024 Portland benchmarking disclosure it reported a site energy-use intensity of 22.3 kBtu/ft² and 40 tCO₂e of greenhouse-gas emissions.
Commercial Building Energy Performance Reporting Policy · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 22.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 40 tCO₂e |
| GHG intensity | — |
| Electricity | 94,606 kWh |
| Natural gas | 1,894 therms |
| Gross floor area | 23,000 sq ft |
| Source record | portland_or:1N1E33CB-600-B1:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 22.3 kBtu/ft² | 40 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
- 328 NW 23RD 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 23rd and Flanders compare with other office buildings in Portland?
The latest disclosures cover 335 office buildings in Portland, out of 952 buildings citywide. Its site EUI of 22.3 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 23,000 sq ft, it is about 77% below the average floor area of 100,908 sq ft for those buildings. It was built in 2005, 48 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 23rd and Flanders's energy performance changed over time?
BuildingCensus holds 2 Portland disclosures for 23rd and Flanders, covering report years 2023–2024. Only one of those years carries energy figures.
What does a site EUI of 22.3 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. 23rd and Flanders's 22.3 kBtu/ft² across 23,000 sq ft works out to about 0.5 billion Btu (150 MWh-equivalent) in 2024. The disclosure also reports 94,606 kWh of electricity and 1,894 therms of natural gas for the year.
Which law requires 23rd and Flanders to report its energy use?
23rd and Flanders 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:1N1E33CB-600-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
- Silver Building (Adidas)· 22,800 sq ft · EUI 60.6 kBtu/ft²
- 975 SE SANDY BLVD· 22,800 sq ft · score 33 (D)
- Custom Blocks North (1306 SE 9TH AVE)· 22,790 sq ft · EUI 47.6 kBtu/ft²
- Park Washington Building· 22,570 sq ft · EUI 28.3 kBtu/ft²
- Lovejoy ActivSpace· 22,492 sq ft · score 43 (D)
- 424 NW 14TH AVE· 22,432 sq ft · score 93 (A)
- 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 23rd and Flanders's energy grade?
23rd and Flanders did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 22.3 kBtu/ft².
How much energy does 23rd and Flanders use?
Its 2024 site energy-use intensity was 22.3 kBtu/ft² across 23,000 sq ft, including 94,606 kWh of electricity and 1,894 therms of natural gas.
What are 23rd and Flanders's carbon emissions?
23rd and Flanders reported 40 tCO₂e of greenhouse-gas emissions for 2024.
Where is 23rd and Flanders?
23rd and Flanders is at 328 NW 23RD AVE, in Portland, Oregon.
How big is 23rd and Flanders and when was it built?
23rd and Flanders has 23,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2005 as its year built. It is classed as office.
Is 23rd and Flanders 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, “23rd and Flanders, Portland, Oregon — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/portland/23rd-and-flanders-fc32ab65 (data as of July 9, 2026).