At a glance
Kcts 9 is a 66,240-square-foot other building at 401 MERCER ST in Seattle, Washington, built in 1986. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 43.8 kBtu/ft² and 13 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 43.8 kBtu/ft² |
| Source EUI | 122.7 kBtu/ft² |
| GHG emissions | 13 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 714,250 kWh |
| Gross floor area | 66,240 sq ft |
| Source record | seattle:113:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 43.8 kBtu/ft² | 13 tCO₂e | |
| 2024 | — | 36.0 kBtu/ft² | 12 tCO₂e | |
| 2023 | — | 54.5 kBtu/ft² | 18 tCO₂e | |
| 2022 | — | 56.5 kBtu/ft² | 18 tCO₂e | |
| 2021 | — | 53.7 kBtu/ft² | 17 tCO₂e | |
| 2020 | — | 61.4 kBtu/ft² | 20 tCO₂e | |
| 2019 | — | 73.8 kBtu/ft² | 24 tCO₂e | |
| 2018 | — | 77.2 kBtu/ft² | 25 tCO₂e | |
| 2017 | — | 79.5 kBtu/ft² | 26 tCO₂e | |
| 2016 | — | 74.9 kBtu/ft² | 24 tCO₂e | |
| 2015 | — | 77.8 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
- 401 MERCER ST
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62391, -122.34837
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Kcts 9 compare with other other buildings in Seattle?
The latest disclosures cover 45 other buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 43.8 kBtu/ft² is about 26% below the average of 59.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.2 kgCO₂e/ft² is about 78% below the group average of 1.1 kgCO₂e/ft².
At 66,240 sq ft, it is about 19% above the average floor area of 55,708 sq ft for those buildings. It was built in 1986, 34 years later than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 1,327 other buildings average an ENERGY STAR score of 60 and a site EUI of 63.3 kBtu/ft².
How has Kcts 9's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Kcts 9, covering report years 2015–2025. Site EUI moved from 77.8 kBtu/ft² (2015) to 43.8 kBtu/ft² (2025), a 44% decrease. Reported emissions went from 25 tCO₂e to 13 tCO₂e over the same span (down 46%).
What does a site EUI of 43.8 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. Kcts 9's 43.8 kBtu/ft² across 66,240 sq ft works out to about 2.9 billion Btu (850 MWh-equivalent) in 2025. Its source EUI of 122.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 714,250 kWh of electricity for the year.
Which law requires Kcts 9 to report its energy use?
Kcts 9 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:113:2025). 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 buildings in Seattle
- Bagley Wright Theater (Rep) - Seattle Center· 65,127 sq ft · EUI 75.5 kBtu/ft²
- MERCER ARENA - SEATTLE CENTER· 60,696 sq ft · EUI 2.6 kBtu/ft²
- 424 S CLOVERDALE ST· 50,417 sq ft
- Bedrosians Tile & Stone· 50,200 sq ft · EUI 32.9 kBtu/ft²
- Sea-Mar Community Care Center (Nursing Home)· 49,770 sq ft
- Seattle Storm Center For Basketball Performance· 48,610 sq ft · EUI 46.5 kBtu/ft²
- Other buildings in Seattle· 45 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 Kcts 9's energy grade?
Kcts 9 did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 43.8 kBtu/ft².
How much energy does Kcts 9 use?
Its 2025 site energy-use intensity was 43.8 kBtu/ft² (122.7 kBtu/ft² source) across 66,240 sq ft, including 714,250 kWh of electricity.
What are Kcts 9's carbon emissions?
Kcts 9 reported 13 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is Kcts 9?
Kcts 9 is at 401 MERCER ST, in Seattle, Washington 98109. Its coordinates are 47.62391, -122.34837 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Kcts 9 and when was it built?
Kcts 9 has 66,240 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1986 as its year built. It is classed as other.
Is Kcts 9 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, “Kcts 9, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/kcts-9-dc7a92a9 (data as of October 2, 2026).