Boylston Apartments (Lihi)
Multifamily Housing in Seattle, WA · 420 BOYLSTON AVE E · 98102
At a glance
Boylston Apartments (Lihi) is a 27,148-square-foot multifamily housing building at 420 BOYLSTON AVE E in Seattle, Washington, built in 2020.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 190,808 kWh |
| Gross floor area | 27,148 sq ft |
| Source record | seattle:50776:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | 94 | ±0 | 48.8 kBtu/ft² | 36 tCO₂e |
| 2023 | 94 | -6 | 47.6 kBtu/ft² | 32 tCO₂e |
| 2022 | 100 | ±0 | 26.5 kBtu/ft² | 4 tCO₂e |
| 2021 | 100 | 0.9 kBtu/ft² | 0 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
- 420 BOYLSTON AVE E
- City
- Seattle
- State
- Washington
- ZIP
- 98102
- Coordinates
- 47.62267, -122.32278
Within ~1 km
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- 1150 Eastlakescore —
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See also: most efficient in Seattle · biggest emitters
How does Boylston Apartments (Lihi) 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.
At 27,148 sq ft, it is about 69% below the average floor area of 86,468 sq ft for those buildings. It was built in 2020, 37 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 Boylston Apartments (Lihi)'s energy performance changed over time?
BuildingCensus holds 5 Seattle disclosures for Boylston Apartments (Lihi), covering report years 2021–2025. Its ENERGY STAR score went from 100 in 2021 to 94 in 2024 (-6 points); its best year on file was 2021, at 100. Site EUI moved from 0.9 kBtu/ft² (2021) to 48.8 kBtu/ft² (2024), an 5322% increase. Reported emissions went from 0 tCO₂e to 36 tCO₂e over the same span (up 35400%).
Which law requires Boylston Apartments (Lihi) to report its energy use?
Boylston Apartments (Lihi) 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:50776:2025). 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
- Lewiston Apartments· 27,140 sq ft · EUI 31.6 kBtu/ft²
- Brandon Court Condominium· 27,119 sq ft · EUI 18.4 kBtu/ft²
- Che Senh Minh· 27,076 sq ft · score 90 (A)
- Holden Manor Condominium· 26,970 sq ft · EUI 23.3 kBtu/ft²
- Signature Place Condominium· 26,964 sq ft · EUI 17.1 kBtu/ft²
- Marriam On Alki· 26,896 sq ft · score 82 (B)
- 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 Boylston Apartments (Lihi)'s energy grade?
Boylston Apartments (Lihi) did not report an ENERGY STAR score in its 2025 disclosure.
How much energy does Boylston Apartments (Lihi) use?
No energy-use intensity was reported for 2025.
What are Boylston Apartments (Lihi)'s carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is Boylston Apartments (Lihi)?
Boylston Apartments (Lihi) is at 420 BOYLSTON AVE E, in Seattle, Washington 98102. Its coordinates are 47.62267, -122.32278 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Boylston Apartments (Lihi) and when was it built?
Boylston Apartments (Lihi) has 27,148 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2020 as its year built. It is classed as multifamily housing.
Is Boylston Apartments (Lihi) 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, “Boylston Apartments (Lihi), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/boylston-apartments-lihi-1a64399e (data as of October 2, 2026).