At a glance
Second And Spring Building is a 172,842-square-foot office building at 1100 2ND AVE in Seattle, Washington, built in 1958. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 50.3 kBtu/ft² and 85 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 50.3 kBtu/ft² |
| Source EUI | 130.3 kBtu/ft² |
| GHG emissions | 85 tCO₂e |
| GHG intensity | 0.6 kgCO₂e/ft² |
| Electricity | 1,912,319 kWh |
| Natural gas | 8,929 therms |
| Gross floor area | 172,842 sq ft |
| Source record | seattle:350:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 50.3 kBtu/ft² | 85 tCO₂e | |
| 2024 | — | 236.1 kBtu/ft² | 298 tCO₂e | |
| 2023 | — | 268.1 kBtu/ft² | 377 tCO₂e | |
| 2022 | — | 257.6 kBtu/ft² | 370 tCO₂e | |
| 2021 | — | 193.4 kBtu/ft² | 257 tCO₂e | |
| 2020 | — | 132.4 kBtu/ft² | 191 tCO₂e | |
| 2019 | — | 157.8 kBtu/ft² | 239 tCO₂e | |
| 2018 | — | 235.8 kBtu/ft² | 290 tCO₂e | |
| 2017 | — | 293.2 kBtu/ft² | 329 tCO₂e | |
| 2016 | — | 297.4 kBtu/ft² | 316 tCO₂e | |
| 2015 | — | 312.1 kBtu/ft² | 312 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 1100 2ND AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98101
- Coordinates
- 47.60642, -122.33581
Within ~1 km
Nearby benchmarked buildings
- Columbia Centerscore 90
Office · 1,952,220 sq ft
- Seattle Convention Centerscore —
Convention Center · 1,842,925 sq ft
- Two Union Squarescore 96
Office · 1,605,578 sq ft
- Russell Investments Centerscore 92
Office · 1,592,914 sq ft
- Us Bank Centerscore 87
Office · 1,536,606 sq ft
Office · 1,527,817 sq ft
See also: most efficient in Seattle · biggest emitters
How does Second And Spring Building compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 50.3 kBtu/ft² is about 12% above 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 0.6 kgCO₂e/ft² is about 19% below the group average of 0.7 kgCO₂e/ft².
At 172,842 sq ft, it is about 12% below the average floor area of 196,452 sq ft for those buildings. It was built in 1958, 7 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 Second And Spring Building's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Second And Spring Building, covering report years 2015–2025. Site EUI moved from 312.1 kBtu/ft² (2015) to 50.3 kBtu/ft² (2025), a 84% decrease. Reported emissions went from 312 tCO₂e to 85 tCO₂e over the same span (down 73%).
What does a site EUI of 50.3 kBtu/ft² mean?
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. Second And Spring Building's 50.3 kBtu/ft² across 172,842 sq ft works out to about 8.7 billion Btu (2,548 MWh-equivalent) in 2025. Its source EUI of 130.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,912,319 kWh of electricity and 8,929 therms of natural gas for the year.
Which law requires Second And Spring Building to report its energy use?
Second And Spring Building 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:350:2025). 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
- 35 Stone Office Building· 171,945 sq ft · score 88 (A)
- Active Voice Building (Formerly Sixth & Lenora)· 169,020 sq ft · score 87 (A)
- National Building· 167,860 sq ft · EUI 22.5 kBtu/ft²
- Colman Building· 166,975 sq ft · score 84 (B)
- 5th & Pine· 165,202 sq ft · score 95 (A)
- Occidental Mall· 164,380 sq ft · score 80 (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 Second And Spring Building's energy grade?
Second And Spring Building did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 50.3 kBtu/ft².
How much energy does Second And Spring Building use?
Its 2025 site energy-use intensity was 50.3 kBtu/ft² (130.3 kBtu/ft² source) across 172,842 sq ft, including 1,912,319 kWh of electricity and 8,929 therms of natural gas.
What are Second And Spring Building's carbon emissions?
Second And Spring Building reported 85 tCO₂e of greenhouse-gas emissions (0.6 kgCO₂e/ft²) for 2025.
Where is Second And Spring Building?
Second And Spring Building is at 1100 2ND AVE, in Seattle, Washington 98101. Its coordinates are 47.60642, -122.33581 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Second And Spring Building and when was it built?
Second And Spring Building has 172,842 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1958 as its year built. It is classed as office.
Is Second And Spring Building 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, “Second And Spring Building, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/second-and-spring-building-ebc570fb (data as of October 2, 2026).