Reunion House
Multifamily Housing in Seattle, WA · 530 10TH AVE E · 98102
At a glance
Reunion House is a 24,620-square-foot multifamily housing building at 530 10TH AVE E in Seattle, Washington, built in 1984. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 40 out of 100 (grade D), a site energy-use intensity of 34.1 kBtu/ft² and 5 tCO₂e of greenhouse-gas emissions. That score is higher than 5% 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 | 40 (band D) |
| Site EUI | 34.1 kBtu/ft² |
| Source EUI | 95.5 kBtu/ft² |
| GHG emissions | 5 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 240,971 kWh |
| Gross floor area | 24,620 sq ft |
| Source record | seattle:25322:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 40 | +4 | 34.1 kBtu/ft² | 5 tCO₂e |
| 2024 | 36 | -3 | 34.8 kBtu/ft² | 5 tCO₂e |
| 2023 | 39 | +1 | 35.0 kBtu/ft² | 5 tCO₂e |
| 2022 | 38 | -1 | 36.2 kBtu/ft² | 5 tCO₂e |
| 2021 | 39 | -1 | 35.3 kBtu/ft² | 5 tCO₂e |
| 2020 | 40 | -7 | 33.1 kBtu/ft² | 5 tCO₂e |
| 2019 | 47 | +5 | 32.0 kBtu/ft² | 5 tCO₂e |
| 2018 | 42 | +1 | 32.8 kBtu/ft² | 5 tCO₂e |
| 2017 | 41 | +36 | 34.7 kBtu/ft² | 5 tCO₂e |
| 2016 | 5 | -15 | 42.4 kBtu/ft² | 6 tCO₂e |
| 2015 | 20 | 37.5 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 530 10TH AVE E
- City
- Seattle
- State
- Washington
- ZIP
- 98102
- Coordinates
- 47.62397, -122.31962
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Reunion House 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. Reunion House's ENERGY STAR score of 40 compares with an average of 83 across the 1,652 that report a score; it scores higher than 5% of them and lower than 94%. Its site EUI of 34.1 kBtu/ft² is roughly in line with 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 71% below the group average of 0.7 kgCO₂e/ft².
At 24,620 sq ft, it is about 72% below the average floor area of 86,468 sq ft for those buildings. Its 1984 construction date is close to 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 Reunion House's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Reunion House, covering report years 2015–2025. Its ENERGY STAR score went from 20 in 2015 to 40 in 2025 (+20 points); its best year on file was 2019, at 47. Site EUI moved from 37.5 kBtu/ft² (2015) to 34.1 kBtu/ft² (2025), a 9% decrease. Reported emissions went from 5 tCO₂e to 5 tCO₂e over the same span (down 12%).
What does an ENERGY STAR score of 40 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 40 means the building performs better than about 40% of its national peers. BuildingCensus bands the score into report-card grades; 40 falls in band D — lowest band (1–54). It sits 35 points below 75, the threshold for ENERGY STAR certification. 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. Reunion House's 34.1 kBtu/ft² across 24,620 sq ft works out to about 0.8 billion Btu (246 MWh-equivalent) in 2025. Its source EUI of 95.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 240,971 kWh of electricity for the year.
Which law requires Reunion House to report its energy use?
Reunion House 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:25322:2025). 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
- Tod Apartments· 24,600 sq ft · score 62 (C)
- Renaissance The Condominium· 24,581 sq ft · EUI 27.9 kBtu/ft²
- Towne Terrace Condominium· 24,570 sq ft · score 79 (B)
- Chardonnay Apartments· 24,560 sq ft · score 73 (B)
- Northgate View #3· 24,552 sq ft · score 86 (A)
- Lee And Lee Apartments· 24,548 sq ft · score 100 (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 Reunion House's energy grade?
Reunion House scores 40 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Reunion House use?
Its 2025 site energy-use intensity was 34.1 kBtu/ft² (95.5 kBtu/ft² source) across 24,620 sq ft, including 240,971 kWh of electricity.
What are Reunion House's carbon emissions?
Reunion House reported 5 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is Reunion House?
Reunion House is at 530 10TH AVE E, in Seattle, Washington 98102. Its coordinates are 47.62397, -122.31962 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Reunion House and when was it built?
Reunion House has 24,620 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1984 as its year built. It is classed as multifamily housing.
Is Reunion House 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, “Reunion House, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/reunion-house-65770773 (data as of October 2, 2026).