At a glance
Leschi Lake Center is a 75,868-square-foot office building at 120 LAKESIDE AVE in Seattle, Washington, built in 1956. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 47.8 kBtu/ft² and 31 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 47.8 kBtu/ft² |
| Source EUI | 128.8 kBtu/ft² |
| GHG emissions | 31 tCO₂e |
| GHG intensity | 0.4 kgCO₂e/ft² |
| Electricity | 998,571 kWh |
| Natural gas | 2,198 therms |
| Gross floor area | 75,868 sq ft |
| Source record | seattle:27389:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 47.8 kBtu/ft² | 31 tCO₂e | |
| 2024 | — | 51.8 kBtu/ft² | 34 tCO₂e | |
| 2023 | — | 53.8 kBtu/ft² | 25 tCO₂e | |
| 2022 | — | 62.7 kBtu/ft² | 25 tCO₂e | |
| 2021 | — | 63.8 kBtu/ft² | 63 tCO₂e | |
| 2020 | — | 63.4 kBtu/ft² | 57 tCO₂e | |
| 2019 | — | 75.2 kBtu/ft² | 76 tCO₂e | |
| 2018 | — | 78.6 kBtu/ft² | 80 tCO₂e | |
| 2017 | — | 73.2 kBtu/ft² | 83 tCO₂e | |
| 2016 | — | 47.5 kBtu/ft² | 67 tCO₂e | |
| 2015 | — | 40.5 kBtu/ft² | 19 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
- 120 LAKESIDE AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98122
- Coordinates
- 47.60207, -122.28481
Within ~1 km
Nearby benchmarked buildings
- Avana On The Lakescore 98
Multifamily Housing · 72,566 sq ft
Multifamily LR (1-4) · 63,236 sq ft
K-12 School · 55,353 sq ft
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- Trinity Shores Aptsscore 96
Multifamily Housing · 25,966 sq ft
- The Pier At Leschiscore 92
Multifamily Housing · 23,856 sq ft
See also: most efficient in Seattle · biggest emitters
How does Leschi Lake Center 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 47.8 kBtu/ft² is roughly in line with the average of 44.8 kBtu/ft². Its emissions intensity of 0.4 kgCO₂e/ft² is about 43% below the group average of 0.7 kgCO₂e/ft².
At 75,868 sq ft, it is about 61% below the average floor area of 196,452 sq ft for those buildings. It was built in 1956, 9 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 Leschi Lake Center's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Leschi Lake Center, covering report years 2015–2025. Site EUI moved from 40.5 kBtu/ft² (2015) to 47.8 kBtu/ft² (2025), an 18% increase. Reported emissions went from 19 tCO₂e to 31 tCO₂e over the same span (up 60%).
What does a site EUI of 47.8 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. Leschi Lake Center's 47.8 kBtu/ft² across 75,868 sq ft works out to about 3.6 billion Btu (1,063 MWh-equivalent) in 2025. Its source EUI of 128.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 998,571 kWh of electricity and 2,198 therms of natural gas for the year.
Which law requires Leschi Lake Center to report its energy use?
Leschi Lake 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:27389:2025). 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
- Palmer Bldg· 75,600 sq ft · score 85 (A)
- Interurban Building (Old Smith Tower Annex Building)· 75,496 sq ft · score 86 (A)
- Provident Building· 75,288 sq ft · score 87 (A)
- NORTHGATE EXECUTIVE CENTER B· 74,880 sq ft · score 42 (D)
- First Baptist Church· 73,549 sq ft · score 62 (C)
- Prefontaine Building· 73,470 sq ft · score 62 (C)
- 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 Leschi Lake Center's energy grade?
Leschi Lake Center did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 47.8 kBtu/ft².
How much energy does Leschi Lake Center use?
Its 2025 site energy-use intensity was 47.8 kBtu/ft² (128.8 kBtu/ft² source) across 75,868 sq ft, including 998,571 kWh of electricity and 2,198 therms of natural gas.
What are Leschi Lake Center's carbon emissions?
Leschi Lake Center reported 31 tCO₂e of greenhouse-gas emissions (0.4 kgCO₂e/ft²) for 2025.
Where is Leschi Lake Center?
Leschi Lake Center is at 120 LAKESIDE AVE, in Seattle, Washington 98122. Its coordinates are 47.60207, -122.28481 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Leschi Lake Center and when was it built?
Leschi Lake Center has 75,868 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1956 as its year built. It is classed as office.
Is Leschi Lake 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, “Leschi Lake Center, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/leschi-lake-center-be278d4f (data as of October 2, 2026).