1441 Lake Union Center
Mixed Use Property in Seattle, WA · 1441 N 34TH ST · 98103
At a glance
1441 Lake Union Center is a 103,697-square-foot mixed use property building at 1441 N 34TH ST in Seattle, Washington, built in 2001. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 234.3 kBtu/ft² and 488 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 234.3 kBtu/ft² |
| Source EUI | 439.2 kBtu/ft² |
| GHG emissions | 488 tCO₂e |
| GHG intensity | 6.6 kgCO₂e/ft² |
| Electricity | 2,398,006 kWh |
| Natural gas | 91,871 therms |
| Gross floor area | 103,697 sq ft |
| Source record | seattle:457:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 234.3 kBtu/ft² | 488 tCO₂e | |
| 2024 | — | 250.8 kBtu/ft² | 614 tCO₂e | |
| 2023 | — | 184.1 kBtu/ft² | 419 tCO₂e | |
| 2022 | — | 185.0 kBtu/ft² | 378 tCO₂e | |
| 2021 | — | 226.3 kBtu/ft² | 542 tCO₂e | |
| 2020 | 1 | ±0 | 212.1 kBtu/ft² | 354 tCO₂e |
| 2019 | 1 | ±0 | 211.7 kBtu/ft² | 354 tCO₂e |
| 2018 | 1 | -4 | 244.1 kBtu/ft² | 457 tCO₂e |
| 2017 | 5 | -2 | 181.1 kBtu/ft² | 332 tCO₂e |
| 2016 | 7 | +6 | 179.1 kBtu/ft² | 369 tCO₂e |
| 2015 | 1 | 242.5 kBtu/ft² | 411 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
- 1441 N 34TH ST
- City
- Seattle
- State
- Washington
- ZIP
- 98103
- Coordinates
- 47.64776, -122.33924
Within ~1 km
Nearby benchmarked buildings
- Bowman Stonewayscore 99
Multifamily Housing · 426,320 sq ft
- Tableau (North Edge)score 88
Office · 338,989 sq ft
- Amli Wallingford Apartment-Northscore 99
Multifamily Housing · 213,576 sq ft
- The Clinescore 100
Multifamily Housing · 209,331 sq ft
- Stone 34score 88
Office · 206,126 sq ft
- Prescott Wallingford Apartmentsscore 100
Multifamily Housing · 198,233 sq ft
See also: most efficient in Seattle · biggest emitters
How does 1441 Lake Union Center compare with other mixed use property buildings in Seattle?
The latest disclosures cover 157 mixed use property buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 234.3 kBtu/ft² is about 241% above the average of 68.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 6.6 kgCO₂e/ft² is about 370% above the group average of 1.4 kgCO₂e/ft².
At 103,697 sq ft, it is about 37% below the average floor area of 165,352 sq ft for those buildings. It was built in 2001, 33 years later than the group's average year built (1968). Across all 24 jurisdictions BuildingCensus covers, the 1,212 mixed use property buildings average an ENERGY STAR score of 69 and a site EUI of 79.8 kBtu/ft².
How has 1441 Lake Union Center's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for 1441 Lake Union Center, covering report years 2015–2025. Its ENERGY STAR score was 1 in both 2015 and 2020. Site EUI moved from 242.5 kBtu/ft² (2015) to 234.3 kBtu/ft² (2025), a 3% decrease. Reported emissions went from 411 tCO₂e to 488 tCO₂e over the same span (up 19%).
What does a site EUI of 234.3 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. 1441 Lake Union Center's 234.3 kBtu/ft² across 103,697 sq ft works out to about 24.3 billion Btu (7,121 MWh-equivalent) in 2025. Its source EUI of 439.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,398,006 kWh of electricity and 91,871 therms of natural gas for the year.
Which law requires 1441 Lake Union Center to report its energy use?
1441 Lake Union Center 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:457:2025). 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 mixed use property buildings in Seattle
- Third And Battery Building· 95,576 sq ft · EUI 27.7 kBtu/ft²
- 1455 Leary Building· 94,759 sq ft · EUI 79.5 kBtu/ft²
- Admiral Condominium· 93,114 sq ft · score 86 (A)
- Thaw Building· 91,360 sq ft · score 35 (D)
- Ballard Block Ii- 1401 Nw 46th St· 91,200 sq ft · EUI 75.1 kBtu/ft²
- Spu Operations Control Center (Occ) Complex· 90,072 sq ft · EUI 75.0 kBtu/ft²
- Mixed Use Property buildings in Seattle· 157 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 1441 Lake Union Center's energy grade?
1441 Lake Union Center did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 234.3 kBtu/ft².
How much energy does 1441 Lake Union Center use?
Its 2025 site energy-use intensity was 234.3 kBtu/ft² (439.2 kBtu/ft² source) across 103,697 sq ft, including 2,398,006 kWh of electricity and 91,871 therms of natural gas.
What are 1441 Lake Union Center's carbon emissions?
1441 Lake Union Center reported 488 tCO₂e of greenhouse-gas emissions (6.6 kgCO₂e/ft²) for 2025.
Where is 1441 Lake Union Center?
1441 Lake Union Center is at 1441 N 34TH ST, in Seattle, Washington 98103. Its coordinates are 47.64776, -122.33924 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1441 Lake Union Center and when was it built?
1441 Lake Union Center has 103,697 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2001 as its year built. It is classed as mixed use property.
Is 1441 Lake Union Center 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, “1441 Lake Union Center, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/1441-lake-union-center-3e2df050 (data as of October 2, 2026).