600 BROADWAY
Medical Office in Seattle, WA · 98122
At a glance
600 BROADWAY is a 289,419-square-foot medical office in Seattle, Washington, built in 1990. In its 2024 Seattle benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 65.5 kBtu/ft² and 94 tCO₂e of greenhouse-gas emissions. That score is higher than 75% of the 32 scored medical office buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 92 (band A) |
| Site EUI | 65.5 kBtu/ft² |
| Source EUI | 173.6 kBtu/ft² |
| GHG emissions | 94 tCO₂e |
| GHG intensity | 0.6 kgCO₂e/ft² |
| Electricity | 2,565,478 kWh |
| Natural gas | 8,185 therms |
| Gross floor area | 289,419 sq ft |
| Source record | seattle:831:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 92 | +18 | 65.5 kBtu/ft² | 94 tCO₂e |
| 2023 | 74 | +16 | 73.1 kBtu/ft² | 107 tCO₂e |
| 2022 | 58 | -3 | 82.7 kBtu/ft² | 115 tCO₂e |
| 2021 | 61 | -5 | 78.0 kBtu/ft² | 84 tCO₂e |
| 2020 | 66 | +8 | 78.9 kBtu/ft² | 99 tCO₂e |
| 2019 | 58 | +2 | 90.0 kBtu/ft² | 120 tCO₂e |
| 2018 | 56 | -1 | 93.5 kBtu/ft² | 124 tCO₂e |
| 2017 | 57 | -2 | 96.1 kBtu/ft² | 145 tCO₂e |
| 2016 | 59 | -8 | 87.1 kBtu/ft² | 120 tCO₂e |
| 2015 | 67 | 80.7 kBtu/ft² | 127 tCO₂e |
Compliance context
Seattle Energy Benchmarking Ordinance (SMC 22.920)
Seattle's Building Emissions Performance Standard (adopted 2023) applies to buildings over 20,000 sq ft: benchmarking verification is due 2027–2030 and initial emissions targets 2031–2035, reaching net zero by 2041–2050, with fines for non-compliance.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 600 BROADWAY
- City
- Seattle
- State
- Washington
- ZIP
- 98122
- Coordinates
- 47.60778, -122.32013
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does 600 BROADWAY compare with other medical office buildings in Seattle?
The latest disclosures cover 45 medical office buildings in Seattle, out of 3,871 buildings citywide. 600 BROADWAY's ENERGY STAR score of 92 compares with an average of 60 across the 32 that report a score; it scores higher than 75% of them and lower than 19%. Its site EUI of 65.5 kBtu/ft² is about 26% below the average of 88.3 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.6 kgCO₂e/ft² is about 57% below the group average of 1.5 kgCO₂e/ft².
At 289,419 sq ft, it is about twice the average floor area of 145,612 sq ft for those buildings. It was built in 1990, 11 years later than the group's average year built (1979). Across all 24 jurisdictions BuildingCensus covers, the 1,266 medical office buildings average an ENERGY STAR score of 64 and a site EUI of 92.2 kBtu/ft².
How has 600 BROADWAY's energy performance changed over time?
BuildingCensus holds 10 Seattle disclosures for 600 BROADWAY, covering report years 2015–2024. Its ENERGY STAR score went from 67 in 2015 to 92 in 2024 (+25 points). Site EUI moved from 80.7 kBtu/ft² (2015) to 65.5 kBtu/ft² (2024), a 19% decrease. Reported emissions went from 127 tCO₂e to 94 tCO₂e over the same span (down 26%).
What does an ENERGY STAR score of 92 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 92 means the building performs better than about 92% of its national peers. BuildingCensus bands the score into report-card grades; 92 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 Seattle, 69% 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. 600 BROADWAY's 65.5 kBtu/ft² across 289,419 sq ft works out to about 19 billion Btu (5,556 MWh-equivalent) in 2024. Its source EUI of 173.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,565,478 kWh of electricity and 8,185 therms of natural gas for the year.
Which law requires 600 BROADWAY to report its energy use?
600 BROADWAY reports under the Seattle Energy Benchmarking Ordinance (SMC 22.920), the legal basis of Seattle's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record seattle:831:2024). Seattle's Building Emissions Performance Standard (adopted 2023) applies to buildings over 20,000 sq ft: benchmarking verification is due 2027–2030 and initial emissions targets 2031–2035, reaching net zero by 2041–2050, with fines for non-compliance.
More medical office buildings in Seattle
- HARBORVIEW MEDICAL CENTER - Pat Steel Building· 275,130 sq ft
- Virginia Mason- Lindeman Pavilion· 266,000 sq ft · score 66 (C)
- Meridian Medical Pavilion· 161,789 sq ft · score 69 (C)
- Northwest Outpatient Medical Center· 133,298 sq ft · score 24 (D)
- Northgate Plaza· 127,392 sq ft · EUI 57.0 kBtu/ft²
- Bloodworks Nw Central Seattle· 121,099 sq ft · score 27 (D)
- Medical Office buildings in Seattle· 45 benchmarked
- All Seattle benchmarked buildings· Seattle Energy Benchmarking Ordinance (SMC 22.920)
- Most efficient large buildings in Seattle
- Least efficient large buildings in Seattle
- Biggest emitters in Seattle
Frequently asked questions
What is 600 BROADWAY's energy grade?
600 BROADWAY scores 92 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 600 BROADWAY use?
Its 2024 site energy-use intensity was 65.5 kBtu/ft² (173.6 kBtu/ft² source) across 289,419 sq ft, including 2,565,478 kWh of electricity and 8,185 therms of natural gas.
What are 600 BROADWAY's carbon emissions?
600 BROADWAY reported 94 tCO₂e of greenhouse-gas emissions (0.6 kgCO₂e/ft²) for 2024.
Where is 600 BROADWAY?
600 BROADWAY is in Seattle, Washington 98122. Its coordinates are 47.60778, -122.32013 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 600 BROADWAY and when was it built?
600 BROADWAY has 289,419 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1990 as its year built. It is classed as medical office.
Is 600 BROADWAY covered by the Seattle Energy Benchmarking Ordinance (SMC 22.920)?
Yes — it appears in the 2024 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Seattle Energy Benchmarking Ordinance (SMC 22.920).
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About this data
Source: Building Energy Benchmarking (Seattle Energy Benchmarking Ordinance (SMC 22.920)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “600 BROADWAY, Seattle, Washington — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/600-broadway-91d81b1b (data as of October 2, 2026).