Harbour House At Leschi Condominium
Multifamily Housing in Seattle, WA · 300 LAKESIDE AVE S · 98144
At a glance
Harbour House At Leschi Condominium is a 33,331-square-foot multifamily housing building at 300 LAKESIDE AVE S in Seattle, Washington, built in 1986. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 29.5 kBtu/ft² and 5 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 29.5 kBtu/ft² |
| Source EUI | 82.5 kBtu/ft² |
| GHG emissions | 5 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 240,101 kWh |
| Gross floor area | 33,331 sq ft |
| Source record | seattle:23109:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 29.5 kBtu/ft² | 5 tCO₂e | |
| 2024 | — | 29.8 kBtu/ft² | 5 tCO₂e | |
| 2023 | — | 30.3 kBtu/ft² | 5 tCO₂e | |
| 2022 | — | 30.7 kBtu/ft² | 5 tCO₂e | |
| 2021 | — | 29.1 kBtu/ft² | 5 tCO₂e | |
| 2020 | — | 27.5 kBtu/ft² | 4 tCO₂e | |
| 2019 | — | 28.1 kBtu/ft² | 5 tCO₂e | |
| 2018 | — | 27.1 kBtu/ft² | 4 tCO₂e | |
| 2017 | — | 29.0 kBtu/ft² | 5 tCO₂e | |
| 2016 | — | 28.0 kBtu/ft² | 5 tCO₂e | |
| 2015 | 70 | 28.9 kBtu/ft² | 5 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
- 300 LAKESIDE AVE S
- City
- Seattle
- State
- Washington
- ZIP
- 98144
- Coordinates
- 47.60001, -122.28562
Within ~1 km
Nearby benchmarked buildings
- Leschi Lake Centerscore —
Office · 75,868 sq ft
- 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
- 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 Harbour House At Leschi Condominium compare with other multifamily housing buildings in Seattle?
The latest disclosures cover 1,971 multifamily housing buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 29.5 kBtu/ft² is about 15% below the average of 34.9 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 76% below the group average of 0.7 kgCO₂e/ft².
At 33,331 sq ft, it is about 61% below the average floor area of 86,468 sq ft for those buildings. It was built in 1986, 3 years later than the group's average year built (1983). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Harbour House At Leschi Condominium's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Harbour House At Leschi Condominium, covering report years 2015–2025. Site EUI moved from 28.9 kBtu/ft² (2015) to 29.5 kBtu/ft² (2025), an 2% increase. Reported emissions went from 5 tCO₂e to 5 tCO₂e over the same span (up 0%).
What does a site EUI of 29.5 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. Harbour House At Leschi Condominium's 29.5 kBtu/ft² across 33,331 sq ft works out to about 1 billion Btu (288 MWh-equivalent) in 2025. Its source EUI of 82.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 240,101 kWh of electricity for the year.
Which law requires Harbour House At Leschi Condominium to report its energy use?
Harbour House At Leschi Condominium 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:23109:2025). 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 multifamily housing buildings in Seattle
- Emerald Arms· 33,279 sq ft · score 83 (B)
- Boylston Howell· 33,274 sq ft · score 99 (A)
- Wallingford 45 Condominium· 33,272 sq ft
- Alder House· 33,192 sq ft · score 33 (D)
- West Republican Place· 33,183 sq ft · score 100 (A)
- 500 West Olympic Place Coop· 33,164 sq ft · score 98 (A)
- Multifamily Housing buildings in Seattle· 1,971 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 Harbour House At Leschi Condominium's energy grade?
Harbour House At Leschi Condominium did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 29.5 kBtu/ft².
How much energy does Harbour House At Leschi Condominium use?
Its 2025 site energy-use intensity was 29.5 kBtu/ft² (82.5 kBtu/ft² source) across 33,331 sq ft, including 240,101 kWh of electricity.
What are Harbour House At Leschi Condominium's carbon emissions?
Harbour House At Leschi Condominium reported 5 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is Harbour House At Leschi Condominium?
Harbour House At Leschi Condominium is at 300 LAKESIDE AVE S, in Seattle, Washington 98144. Its coordinates are 47.60001, -122.28562 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Harbour House At Leschi Condominium and when was it built?
Harbour House At Leschi Condominium has 33,331 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1986 as its year built. It is classed as multifamily housing.
Is Harbour House At Leschi Condominium 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, “Harbour House At Leschi Condominium, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/harbour-house-at-leschi-condominium-8e2e4fe1 (data as of October 2, 2026).