T-Mobile Park (Safeco Field)
Other - Entertainment/Public Assembly in Seattle, WA · 1250 1ST AVE S · 98134
At a glance
T-Mobile Park (Safeco Field) is a 1,172,127-square-foot other - entertainment/public assembly building at 1250 1ST AVE S in Seattle, Washington, built in 1999. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 71.4 kBtu/ft² and 1,840 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 71.4 kBtu/ft² |
| Source EUI | 157.1 kBtu/ft² |
| GHG emissions | 1,840 tCO₂e |
| GHG intensity | 1.6 kgCO₂e/ft² |
| Electricity | 16,121,380 kWh |
| Natural gas | 287,275 therms |
| Gross floor area | 1,172,127 sq ft |
| Source record | seattle:249:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 71.4 kBtu/ft² | 1,840 tCO₂e | |
| 2024 | — | 69.2 kBtu/ft² | 1,721 tCO₂e | |
| 2023 | — | 67.1 kBtu/ft² | 1,750 tCO₂e | |
| 2022 | — | 40.1 kBtu/ft² | 273 tCO₂e | |
| 2021 | — | — | — | |
| 2020 | — | 41.4 kBtu/ft² | 972 tCO₂e | |
| 2019 | — | 59.5 kBtu/ft² | 1,369 tCO₂e | |
| 2018 | — | 60.1 kBtu/ft² | 1,537 tCO₂e | |
| 2017 | — | 58.1 kBtu/ft² | 1,553 tCO₂e | |
| 2016 | — | 50.1 kBtu/ft² | 1,197 tCO₂e | |
| 2015 | — | 49.1 kBtu/ft² | 1,189 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
- 1250 1ST AVE S
- City
- Seattle
- State
- Washington
- ZIP
- 98134
- Coordinates
- 47.59085, -122.33354
Within ~1 km
Nearby benchmarked buildings
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- Embassy Suites- Downtown Seattlescore 91
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Multifamily Housing · 619,416 sq ft
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- 505 First Avenue Buildingscore —
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See also: most efficient in Seattle · biggest emitters
How does T-Mobile Park (Safeco Field) compare with other other - entertainment/public assembly buildings in Seattle?
The latest disclosures cover 12 other - entertainment/public assembly buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 71.4 kBtu/ft² is about 51% above the average of 47.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 1.6 kgCO₂e/ft² is about 12% above the group average of 1.4 kgCO₂e/ft².
At 1,172,127 sq ft, it is about 741% above the average floor area of 139,317 sq ft for those buildings. It was built in 1999, 66 years later than the group's average year built (1933).
How has T-Mobile Park (Safeco Field)'s energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for T-Mobile Park (Safeco Field), covering report years 2015–2025. Site EUI moved from 49.1 kBtu/ft² (2015) to 71.4 kBtu/ft² (2025), an 45% increase. Reported emissions went from 1,189 tCO₂e to 1,840 tCO₂e over the same span (up 55%).
What does a site EUI of 71.4 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. T-Mobile Park (Safeco Field)'s 71.4 kBtu/ft² across 1,172,127 sq ft works out to about 83.7 billion Btu (24,527 MWh-equivalent) in 2025. Its source EUI of 157.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 16,121,380 kWh of electricity and 287,275 therms of natural gas for the year.
Which law requires T-Mobile Park (Safeco Field) to report its energy use?
T-Mobile Park (Safeco Field) 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:249:2025). 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 other - entertainment/public assembly buildings in Seattle
- ACT THEATRE· 128,766 sq ft · EUI 36.6 kBtu/ft²
- Paramount Theatre· 102,761 sq ft · EUI 71.3 kBtu/ft²
- The Summit· 46,560 sq ft · EUI 11.9 kBtu/ft²
- Town Hall Seattle· 38,038 sq ft · EUI 30.6 kBtu/ft²
- Kerry Hall· 31,900 sq ft
- Neptune Theater· 29,636 sq ft · EUI 92.7 kBtu/ft²
- 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 T-Mobile Park (Safeco Field)'s energy grade?
T-Mobile Park (Safeco Field) did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 71.4 kBtu/ft².
How much energy does T-Mobile Park (Safeco Field) use?
Its 2025 site energy-use intensity was 71.4 kBtu/ft² (157.1 kBtu/ft² source) across 1,172,127 sq ft, including 16,121,380 kWh of electricity and 287,275 therms of natural gas.
What are T-Mobile Park (Safeco Field)'s carbon emissions?
T-Mobile Park (Safeco Field) reported 1,840 tCO₂e of greenhouse-gas emissions (1.6 kgCO₂e/ft²) for 2025.
Where is T-Mobile Park (Safeco Field)?
T-Mobile Park (Safeco Field) is at 1250 1ST AVE S, in Seattle, Washington 98134. Its coordinates are 47.59085, -122.33354 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is T-Mobile Park (Safeco Field) and when was it built?
T-Mobile Park (Safeco Field) has 1,172,127 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1999 as its year built. It is classed as other - entertainment/public assembly.
Is T-Mobile Park (Safeco Field) 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, “T-Mobile Park (Safeco Field), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/t-mobile-park-safeco-field-b97f81f4 (data as of October 2, 2026).