At a glance
Office Building, 5030 1ST AVE S is a 43,473-square-foot office building in Seattle, Washington, built in 2000. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 11 out of 100 (grade D), a site energy-use intensity of 89.2 kBtu/ft² and 23 tCO₂e of greenhouse-gas emissions. That score is higher than 2% 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 | 11 (band D) |
| Site EUI | 89.2 kBtu/ft² |
| Source EUI | 249.8 kBtu/ft² |
| GHG emissions | 23 tCO₂e |
| GHG intensity | 0.5 kgCO₂e/ft² |
| Electricity | 1,136,833 kWh |
| Gross floor area | 43,473 sq ft |
| Source record | seattle:24630:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 11 | -1 | 89.2 kBtu/ft² | 23 tCO₂e |
| 2024 | 12 | ±0 | 87.6 kBtu/ft² | 22 tCO₂e |
| 2023 | 12 | ±0 | 88.9 kBtu/ft² | 22 tCO₂e |
| 2022 | 12 | +2 | 88.2 kBtu/ft² | 22 tCO₂e |
| 2021 | 10 | -1 | 93.3 kBtu/ft² | 24 tCO₂e |
| 2020 | 11 | +4 | 89.1 kBtu/ft² | 23 tCO₂e |
| 2019 | 7 | +3 | 100.2 kBtu/ft² | 25 tCO₂e |
| 2018 | 4 | ±0 | 101.2 kBtu/ft² | 26 tCO₂e |
| 2017 | 4 | +1 | 101.1 kBtu/ft² | 26 tCO₂e |
| 2016 | 3 | ±0 | 101.6 kBtu/ft² | 26 tCO₂e |
| 2015 | 3 | 99.6 kBtu/ft² | 25 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
- 5030 1ST AVE S
- City
- Seattle
- State
- Washington
- ZIP
- 98134
- Coordinates
- 47.55658, -122.33322
Within ~1 km
Nearby benchmarked buildings
- Georgetown Squaredscore 74
Office · 390,295 sq ft
- K2 And Iron Mountain (Seattle 4)score 98
Non-Refrigerated Warehouse · 323,916 sq ft
- Terreno 1st Ave Southscore 75
Non-Refrigerated Warehouse · 234,144 sq ft
- Seattle Design Centerscore —
Enclosed Mall · 156,188 sq ft
- Ups Warehousescore —
Distribution Center · 141,686 sq ft
Parking · 127,065 sq ft
See also: most efficient in Seattle · biggest emitters
How does Office Building, 5030 1ST AVE S compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Office Building, 5030 1ST AVE S's ENERGY STAR score of 11 compares with an average of 76 across the 378 that report a score; it scores higher than 2% of them and lower than 97%. Its site EUI of 89.2 kBtu/ft² is about twice the average of 44.8 kBtu/ft² — it uses more 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 43,473 sq ft, it is about 78% below the average floor area of 196,452 sq ft for those buildings. It was built in 2000, 35 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 Office Building, 5030 1ST AVE S's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Office Building, 5030 1ST AVE S, covering report years 2015–2025. Its ENERGY STAR score went from 3 in 2015 to 11 in 2025 (+8 points); its best year on file was 2022, at 12. Site EUI moved from 99.6 kBtu/ft² (2015) to 89.2 kBtu/ft² (2025), a 10% decrease. Reported emissions went from 25 tCO₂e to 23 tCO₂e over the same span (down 10%).
What does an ENERGY STAR score of 11 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 11 means the building performs better than about 11% of its national peers. BuildingCensus bands the score into report-card grades; 11 falls in band D — lowest band (1–54). It sits 64 points below 75, the threshold for ENERGY STAR certification. 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. Office Building, 5030 1ST AVE S's 89.2 kBtu/ft² across 43,473 sq ft works out to about 3.9 billion Btu (1,136 MWh-equivalent) in 2025. Its source EUI of 249.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,136,833 kWh of electricity for the year.
Which law requires Office Building, 5030 1ST AVE S to report its energy use?
Office Building, 5030 1ST AVE S 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:24630:2025). 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
- 223 TAYLOR (TIME WARNER TELECOM)- demolished· 43,183 sq ft · EUI 161.2 kBtu/ft²
- Gatzert And Schwabacher Building· 42,804 sq ft · EUI 43.0 kBtu/ft²
- Office Building, 911 N 145TH ST· 42,793 sq ft · score 22 (D)
- Mottman Building· 41,920 sq ft · EUI 10.8 kBtu/ft²
- SALMON BAY LANDING· 41,784 sq ft
- ICICLE COURT OFFICE BLDG· 41,707 sq ft
- 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 Office Building, 5030 1ST AVE S's energy grade?
Office Building, 5030 1ST AVE S scores 11 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Office Building, 5030 1ST AVE S use?
Its 2025 site energy-use intensity was 89.2 kBtu/ft² (249.8 kBtu/ft² source) across 43,473 sq ft, including 1,136,833 kWh of electricity.
What are Office Building, 5030 1ST AVE S's carbon emissions?
Office Building, 5030 1ST AVE S reported 23 tCO₂e of greenhouse-gas emissions (0.5 kgCO₂e/ft²) for 2025.
Where is Office Building, 5030 1ST AVE S?
Office Building, 5030 1ST AVE S is in Seattle, Washington 98134. Its coordinates are 47.55658, -122.33322 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Office Building, 5030 1ST AVE S and when was it built?
Office Building, 5030 1ST AVE S has 43,473 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2000 as its year built. It is classed as office.
Is Office Building, 5030 1ST AVE S 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, “Office Building, 5030 1ST AVE S, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/office-building-f29633f2 (data as of October 2, 2026).