At a glance
Troy Block (Amazon) is a 1,261,155-square-foot office building at 300 BOREN AVE N in Seattle, Washington, built in 2017. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 88 out of 100 (grade A), a site energy-use intensity of 43.2 kBtu/ft² and 269 tCO₂e of greenhouse-gas emissions. That score is higher than 63% of the 378 scored office buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 88 (band A) |
| Site EUI | 43.2 kBtu/ft² |
| Source EUI | 117.8 kBtu/ft² |
| GHG emissions | 269 tCO₂e |
| GHG intensity | 0.3 kgCO₂e/ft² |
| Electricity | 9,840,876 kWh |
| Natural gas | 15,033 therms |
| Gross floor area | 1,261,155 sq ft |
| Source record | seattle:50241:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 88 | -1 | 43.2 kBtu/ft² | 269 tCO₂e |
| 2024 | 89 | -3 | 40.2 kBtu/ft² | 244 tCO₂e |
| 2023 | 92 | +1 | 39.9 kBtu/ft² | 256 tCO₂e |
| 2022 | 91 | -1 | 41.2 kBtu/ft² | 278 tCO₂e |
| 2021 | 92 | -1 | 40.9 kBtu/ft² | 296 tCO₂e |
| 2020 | 93 | -3 | 41.3 kBtu/ft² | 327 tCO₂e |
| 2019 | 96 | +1 | 43.1 kBtu/ft² | 369 tCO₂e |
| 2018 | 95 | 46.4 kBtu/ft² | 418 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
- 300 BOREN AVE N
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62107, -122.33553
Within ~1 km
Nearby benchmarked buildings
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- Onni South Lake Unionscore 77
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- Amazon Doppler Buildingscore 90
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- Insignia Condosscore 47
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- Hyatt Regency Seattlescore 82
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See also: most efficient in Seattle · biggest emitters
How does Troy Block (Amazon) compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Troy Block (Amazon)'s ENERGY STAR score of 88 compares with an average of 76 across the 378 that report a score; it scores higher than 63% of them and lower than 33%. Its site EUI of 43.2 kBtu/ft² is roughly in line with the average of 44.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.3 kgCO₂e/ft² is about half of the group average of 0.7 kgCO₂e/ft².
At 1,261,155 sq ft, it is about 542% above the average floor area of 196,452 sq ft for those buildings. It was built in 2017, 52 years later than the group's average year built (1965). 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 Troy Block (Amazon)'s energy performance changed over time?
BuildingCensus holds 8 Seattle disclosures for Troy Block (Amazon), covering report years 2018–2025. Its ENERGY STAR score went from 95 in 2018 to 88 in 2025 (-7 points); its best year on file was 2019, at 96. Site EUI moved from 46.4 kBtu/ft² (2018) to 43.2 kBtu/ft² (2025), a 7% decrease. Reported emissions went from 418 tCO₂e to 269 tCO₂e over the same span (down 36%).
What does an ENERGY STAR score of 88 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 88 means the building performs better than about 88% of its national peers. BuildingCensus bands the score into report-card grades; 88 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. Troy Block (Amazon)'s 43.2 kBtu/ft² across 1,261,155 sq ft works out to about 54.5 billion Btu (15,967 MWh-equivalent) in 2025. Its source EUI of 117.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 9,840,876 kWh of electricity and 15,033 therms of natural gas for the year.
Which law requires Troy Block (Amazon) to report its energy use?
Troy Block (Amazon) 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 2025 disclosure (source record seattle:50241:2025). 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 office buildings in Seattle
- Bank Of America Fifth Avenue Plaza· 1,249,055 sq ft · score 90 (A)
- Safeco Plaza / 1001 Fourth Avenue· 1,123,435 sq ft · score 80 (B)
- Fourth & Madison ( Idx Tower)· 1,052,469 sq ft · score 81 (B)
- Madison Center· 990,000 sq ft · score 93 (A)
- 333 Dexter Ave N· 934,154 sq ft · score 84 (B)
- Bill & Melinda Gates Foundation· 920,598 sq ft · score 73 (B)
- Office buildings in Seattle· 497 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 Troy Block (Amazon)'s energy grade?
Troy Block (Amazon) scores 88 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Troy Block (Amazon) use?
Its 2025 site energy-use intensity was 43.2 kBtu/ft² (117.8 kBtu/ft² source) across 1,261,155 sq ft, including 9,840,876 kWh of electricity and 15,033 therms of natural gas.
What are Troy Block (Amazon)'s carbon emissions?
Troy Block (Amazon) reported 269 tCO₂e of greenhouse-gas emissions (0.3 kgCO₂e/ft²) for 2025.
Where is Troy Block (Amazon)?
Troy Block (Amazon) is at 300 BOREN AVE N, in Seattle, Washington 98109. Its coordinates are 47.62107, -122.33553 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Troy Block (Amazon) and when was it built?
Troy Block (Amazon) has 1,261,155 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2017 as its year built. It is classed as office.
Is Troy Block (Amazon) covered by the Seattle Energy Benchmarking Ordinance (SMC 22.920)?
Yes — it appears in the 2025 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, “Troy Block (Amazon), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/troy-block-amazon-8145fc1e (data as of October 2, 2026).