Rialto Court
Multifamily Housing in Seattle, WA · 1729 BOYLSTON AVE · 98122
At a glance
Rialto Court is a 26,684-square-foot multifamily housing building at 1729 BOYLSTON AVE in Seattle, Washington, built in 1907. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A), a site energy-use intensity of 21.8 kBtu/ft² and 3 tCO₂e of greenhouse-gas emissions. That score is higher than 70% of the 1,652 scored multifamily housing buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 97 (band A) |
| Site EUI | 21.8 kBtu/ft² |
| Source EUI | 61.0 kBtu/ft² |
| GHG emissions | 3 tCO₂e |
| GHG intensity | 0.1 kgCO₂e/ft² |
| Electricity | 170,330 kWh |
| Gross floor area | 26,684 sq ft |
| Source record | seattle:26257:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 97 | +7 | 21.8 kBtu/ft² | 3 tCO₂e |
| 2024 | 90 | +4 | 25.6 kBtu/ft² | 4 tCO₂e |
| 2023 | 86 | +1 | 27.1 kBtu/ft² | 4 tCO₂e |
| 2022 | 85 | -6 | 28.4 kBtu/ft² | 4 tCO₂e |
| 2021 | 91 | -1 | 25.4 kBtu/ft² | 4 tCO₂e |
| 2020 | 92 | +5 | 24.0 kBtu/ft² | 4 tCO₂e |
| 2019 | 87 | -7 | 26.1 kBtu/ft² | 4 tCO₂e |
| 2018 | 94 | +6 | 23.2 kBtu/ft² | 4 tCO₂e |
| 2017 | 88 | -5 | 26.9 kBtu/ft² | 4 tCO₂e |
| 2016 | 93 | ±0 | 22.2 kBtu/ft² | 3 tCO₂e |
| 2015 | 93 | 22.4 kBtu/ft² | 4 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
- 1729 BOYLSTON AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98122
- Coordinates
- 47.61724, -122.32390
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Rialto Court 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. Rialto Court's ENERGY STAR score of 97 compares with an average of 83 across the 1,652 that report a score; it scores higher than 70% of them and lower than 25%. Its site EUI of 21.8 kBtu/ft² is about 38% 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 0.1 kgCO₂e/ft² is about 83% below the group average of 0.7 kgCO₂e/ft².
At 26,684 sq ft, it is about 69% below the average floor area of 86,468 sq ft for those buildings. It was built in 1907, 76 years earlier 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 Rialto Court's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Rialto Court, covering report years 2015–2025. Its ENERGY STAR score went from 93 in 2015 to 97 in 2025 (+4 points). Site EUI moved from 22.4 kBtu/ft² (2015) to 21.8 kBtu/ft² (2025), a 3% decrease. Reported emissions went from 4 tCO₂e to 3 tCO₂e over the same span (down 8%).
What does an ENERGY STAR score of 97 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In Seattle, 69% of scored buildings are at 75 or above.
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. Rialto Court's 21.8 kBtu/ft² across 26,684 sq ft works out to about 0.6 billion Btu (170 MWh-equivalent) in 2025. Its source EUI of 61.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 170,330 kWh of electricity for the year.
Which law requires Rialto Court to report its energy use?
Rialto Court 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:26257:2025). 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
- New Pacific Apartments· 26,640 sq ft · score 91 (A)
- Coho Apartments· 26,639 sq ft · score 95 (A)
- City View Leschi· 26,583 sq ft · score 70 (B)
- Canal Place Condominium· 26,568 sq ft · score 100 (A)
- Continental Apts· 26,528 sq ft · EUI 21.0 kBtu/ft²
- Tracy Ann Apts. - North· 26,498 sq ft · score 86 (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 Rialto Court's energy grade?
Rialto Court scores 97 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Rialto Court use?
Its 2025 site energy-use intensity was 21.8 kBtu/ft² (61.0 kBtu/ft² source) across 26,684 sq ft, including 170,330 kWh of electricity.
What are Rialto Court's carbon emissions?
Rialto Court reported 3 tCO₂e of greenhouse-gas emissions (0.1 kgCO₂e/ft²) for 2025.
Where is Rialto Court?
Rialto Court is at 1729 BOYLSTON AVE, in Seattle, Washington 98122. Its coordinates are 47.61724, -122.32390 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Rialto Court and when was it built?
Rialto Court has 26,684 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1907 as its year built. It is classed as multifamily housing.
Is Rialto Court 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, “Rialto Court, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/rialto-court-3439c255 (data as of October 2, 2026).