At a glance
820 / Ofc/Whse Bldg is a 20,150-square-foot office building at 820 1ST AVE S in Seattle, Washington, built in 1920. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A) and a site energy-use intensity of 6.8 kBtu/ft². That score is higher than 96% 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 | 100 (band A) |
| Site EUI | 6.8 kBtu/ft² |
| Source EUI | 19.1 kBtu/ft² |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 40,209 kWh |
| Gross floor area | 20,150 sq ft |
| Source record | seattle:24708:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 100 | ±0 | 6.8 kBtu/ft² | — |
| 2024 | 100 | ±0 | 4.0 kBtu/ft² | 1 tCO₂e |
| 2023 | 100 | ±0 | 4.1 kBtu/ft² | 1 tCO₂e |
| 2022 | 100 | ±0 | 4.4 kBtu/ft² | 1 tCO₂e |
| 2021 | 100 | +2 | 4.9 kBtu/ft² | 1 tCO₂e |
| 2020 | 98 | +23 | 12.5 kBtu/ft² | 2 tCO₂e |
| 2019 | 75 | +2 | 28.6 kBtu/ft² | 3 tCO₂e |
| 2018 | 73 | +7 | 29.5 kBtu/ft² | 3 tCO₂e |
| 2017 | 66 | -14 | 29.1 kBtu/ft² | 3 tCO₂e |
| 2016 | 80 | -1 | 28.6 kBtu/ft² | 3 tCO₂e |
| 2015 | 81 | 28.4 kBtu/ft² | 3 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
- 820 1ST AVE S
- City
- Seattle
- State
- Washington
- ZIP
- 98134
- Coordinates
- 47.59508, -122.33378
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does 820 / Ofc/Whse Bldg compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. 820 / Ofc/Whse Bldg's ENERGY STAR score of 100 compares with an average of 76 across the 378 that report a score; it scores higher than 96% of them. Its site EUI of 6.8 kBtu/ft² is about 85% below the average of 44.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 20,150 sq ft, it is about 90% below the average floor area of 196,452 sq ft for those buildings. It was built in 1920, 45 years earlier 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 820 / Ofc/Whse Bldg's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for 820 / Ofc/Whse Bldg, covering report years 2015–2025. Its ENERGY STAR score went from 81 in 2015 to 100 in 2025 (+19 points); its best year on file was 2021, at 100. Site EUI moved from 28.4 kBtu/ft² (2015) to 6.8 kBtu/ft² (2025), a 76% decrease. Reported emissions went from 3 tCO₂e to 1 tCO₂e over the same span (down 85%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. 820 / Ofc/Whse Bldg's 6.8 kBtu/ft² across 20,150 sq ft works out to about 0.1 billion Btu (40 MWh-equivalent) in 2025. Its source EUI of 19.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 40,209 kWh of electricity for the year.
Which law requires 820 / Ofc/Whse Bldg to report its energy use?
820 / Ofc/Whse Bldg 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:24708:2025). 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
- Bitter Lake Plaza· 20,088 sq ft · score 81 (B)
- Hartford Building· 20,028 sq ft · score 93 (A)
- Nickerson Business Center· 20,022 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 820 / Ofc/Whse Bldg's energy grade?
820 / Ofc/Whse Bldg scores 100 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 820 / Ofc/Whse Bldg use?
Its 2025 site energy-use intensity was 6.8 kBtu/ft² (19.1 kBtu/ft² source) across 20,150 sq ft, including 40,209 kWh of electricity.
What are 820 / Ofc/Whse Bldg's carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is 820 / Ofc/Whse Bldg?
820 / Ofc/Whse Bldg is at 820 1ST AVE S, in Seattle, Washington 98134. Its coordinates are 47.59508, -122.33378 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 820 / Ofc/Whse Bldg and when was it built?
820 / Ofc/Whse Bldg has 20,150 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1920 as its year built. It is classed as office.
Is 820 / Ofc/Whse Bldg 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, “820 / Ofc/Whse Bldg, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/820-ofc-whse-bldg-68622f97 (data as of October 2, 2026).