At a glance
Amazon Phase Vi - Nessie And Bigfoot is a 593,200-square-foot office building at 500 9TH AVE N in Seattle, Washington, built in 2014. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 95 out of 100 (grade A), a site energy-use intensity of 42.9 kBtu/ft² and 220 tCO₂e of greenhouse-gas emissions. That score is higher than 84% 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 | 95 (band A) |
| Site EUI | 42.9 kBtu/ft² |
| Source EUI | 109.3 kBtu/ft² |
| GHG emissions | 220 tCO₂e |
| GHG intensity | 0.5 kgCO₂e/ft² |
| Electricity | 4,415,738 kWh |
| Natural gas | 25,085 therms |
| Gross floor area | 593,200 sq ft |
| Source record | seattle:49985:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 95 | ±0 | 42.9 kBtu/ft² | 220 tCO₂e |
| 2024 | 95 | +4 | 39.5 kBtu/ft² | 144 tCO₂e |
| 2023 | 91 | -1 | 38.7 kBtu/ft² | 174 tCO₂e |
| 2022 | 92 | -1 | 36.3 kBtu/ft² | 170 tCO₂e |
| 2021 | 93 | ±0 | 33.9 kBtu/ft² | 149 tCO₂e |
| 2020 | 93 | ±0 | 36.3 kBtu/ft² | 171 tCO₂e |
| 2019 | 93 | -2 | 44.7 kBtu/ft² | 233 tCO₂e |
| 2018 | 95 | -4 | 40.4 kBtu/ft² | 226 tCO₂e |
| 2017 | 99 | ±0 | 41.4 kBtu/ft² | 229 tCO₂e |
| 2016 | 99 | ±0 | 38.2 kBtu/ft² | 197 tCO₂e |
| 2015 | 99 | 39.2 kBtu/ft² | 193 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
- 500 9TH AVE N
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62384, -122.33941
Within ~1 km
Nearby benchmarked buildings
Office · 1,599,394 sq ft
- Day 1 Tower And Spheres (Amazon)score 93
Office · 1,599,230 sq ft
- Onni South Lake Unionscore 77
Multifamily Housing · 1,546,084 sq ft
- Insignia Condosscore 47
Multifamily Housing · 1,464,631 sq ft
- Amazon Nitroscore 94
Office · 1,323,773 sq ft
- Troy Block (Amazon)score 88
Office · 1,261,155 sq ft
See also: most efficient in Seattle · biggest emitters
How does Amazon Phase Vi - Nessie And Bigfoot compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Amazon Phase Vi - Nessie And Bigfoot's ENERGY STAR score of 95 compares with an average of 76 across the 378 that report a score; it scores higher than 84% of them and lower than 12%. Its site EUI of 42.9 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 0.5 kgCO₂e/ft² is about 26% below the group average of 0.7 kgCO₂e/ft².
At 593,200 sq ft, it is about 202% above the average floor area of 196,452 sq ft for those buildings. It was built in 2014, 49 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 Amazon Phase Vi - Nessie And Bigfoot's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Amazon Phase Vi - Nessie And Bigfoot, covering report years 2015–2025. Its ENERGY STAR score went from 99 in 2015 to 95 in 2025 (-4 points); its best year on file was 2015, at 99. Site EUI moved from 39.2 kBtu/ft² (2015) to 42.9 kBtu/ft² (2025), an 9% increase. Reported emissions went from 193 tCO₂e to 220 tCO₂e over the same span (up 14%).
What does an ENERGY STAR score of 95 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 95 means the building performs better than about 95% of its national peers. BuildingCensus bands the score into report-card grades; 95 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. Amazon Phase Vi - Nessie And Bigfoot's 42.9 kBtu/ft² across 593,200 sq ft works out to about 25.4 billion Btu (7,458 MWh-equivalent) in 2025. Its source EUI of 109.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 4,415,738 kWh of electricity and 25,085 therms of natural gas for the year.
Which law requires Amazon Phase Vi - Nessie And Bigfoot to report its energy use?
Amazon Phase Vi - Nessie And Bigfoot 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:49985:2025). 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
- 1000 2nd Avenue Building· 589,921 sq ft · score 84 (B)
- City Place Iv (Ruby/Dawson)· 571,329 sq ft · score 92 (A)
- Fhcrc - Arnold Bldg· 560,516 sq ft · score 69 (C)
- Amazon Block 18· 556,007 sq ft · score 96 (A)
- Puget Sound Plaza· 552,176 sq ft · score 66 (C)
- Fourth & Blanchard Building· 543,876 sq ft · score 78 (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 Amazon Phase Vi - Nessie And Bigfoot's energy grade?
Amazon Phase Vi - Nessie And Bigfoot scores 95 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 Amazon Phase Vi - Nessie And Bigfoot use?
Its 2025 site energy-use intensity was 42.9 kBtu/ft² (109.3 kBtu/ft² source) across 593,200 sq ft, including 4,415,738 kWh of electricity and 25,085 therms of natural gas.
What are Amazon Phase Vi - Nessie And Bigfoot's carbon emissions?
Amazon Phase Vi - Nessie And Bigfoot reported 220 tCO₂e of greenhouse-gas emissions (0.5 kgCO₂e/ft²) for 2025.
Where is Amazon Phase Vi - Nessie And Bigfoot?
Amazon Phase Vi - Nessie And Bigfoot is at 500 9TH AVE N, in Seattle, Washington 98109. Its coordinates are 47.62384, -122.33941 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Amazon Phase Vi - Nessie And Bigfoot and when was it built?
Amazon Phase Vi - Nessie And Bigfoot has 593,200 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2014 as its year built. It is classed as office.
Is Amazon Phase Vi - Nessie And Bigfoot 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, “Amazon Phase Vi - Nessie And Bigfoot, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/amazon-phase-vi-nessie-and-bigfoot-425514a4 (data as of October 2, 2026).