100 ROY ST APTS - DEMOLISHED
Multifamily LR (1-4) in Seattle, WA · 100 ROY ST · 98109
At a glance
100 ROY ST APTS - DEMOLISHED is a 53,280-square-foot multifamily LR (1-4) building in Seattle, Washington, built in 1948. In its 2021 Seattle benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 63.7 kBtu/ft² and 99 tCO₂e of greenhouse-gas emissions. That score is higher than 48% of the 25 scored multifamily LR (1-4) buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 81 (band B) |
| Site EUI | 63.7 kBtu/ft² |
| Source EUI | 96.3 kBtu/ft² |
| GHG emissions | 99 tCO₂e |
| GHG intensity | — |
| Electricity | 188,675 kWh |
| Natural gas | 17,950 therms |
| Gross floor area | 53,280 sq ft |
| Source record | seattle:27528:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | 81 | +1 | 63.7 kBtu/ft² | 99 tCO₂e |
| 2020 | 80 | +11 | 64.7 kBtu/ft² | 104 tCO₂e |
| 2019 | 69 | -27 | 74.0 kBtu/ft² | 123 tCO₂e |
| 2018 | 96 | +2 | 52.7 kBtu/ft² | 144 tCO₂e |
| 2017 | 94 | -6 | 64.5 kBtu/ft² | 178 tCO₂e |
| 2016 | 100 | +2 | 36.9 kBtu/ft² | 100 tCO₂e |
| 2015 | 98 | 51.8 kBtu/ft² | 142 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
- 100 ROY ST
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62573, -122.35496
Within ~1 km
Nearby benchmarked buildings
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- Third And Broad Bldgscore 94
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- Armory - Seattle Centerscore —
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Multifamily Housing · 308,940 sq ft
- Expo Apartmentsscore 97
Multifamily Housing · 301,831 sq ft
See also: most efficient in Seattle · biggest emitters
How does 100 ROY ST APTS - DEMOLISHED compare with other multifamily LR (1-4) buildings in Seattle?
The latest disclosures cover 53 multifamily LR (1-4) buildings in Seattle, out of 3,871 buildings citywide. 100 ROY ST APTS - DEMOLISHED's ENERGY STAR score of 81 compares with an average of 73 across the 25 that report a score; it scores higher than 48% of them and lower than 48%. Its site EUI of 63.7 kBtu/ft² is about 59% above the average of 40.1 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 53,280 sq ft, it is about 16% above the average floor area of 45,933 sq ft for those buildings. It was built in 1948, 28 years earlier than the group's average year built (1976).
How has 100 ROY ST APTS - DEMOLISHED's energy performance changed over time?
BuildingCensus holds 7 Seattle disclosures for 100 ROY ST APTS - DEMOLISHED, covering report years 2015–2021. Its ENERGY STAR score went from 98 in 2015 to 81 in 2021 (-17 points); its best year on file was 2016, at 100. Site EUI moved from 51.8 kBtu/ft² (2015) to 63.7 kBtu/ft² (2021), an 23% increase. Reported emissions went from 142 tCO₂e to 99 tCO₂e over the same span (down 30%).
What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 falls in band B — above median (70–84). 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. 100 ROY ST APTS - DEMOLISHED's 63.7 kBtu/ft² across 53,280 sq ft works out to about 3.4 billion Btu (995 MWh-equivalent) in 2021. Its source EUI of 96.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 188,675 kWh of electricity and 17,950 therms of natural gas for the year.
Which law requires 100 ROY ST APTS - DEMOLISHED to report its energy use?
100 ROY ST APTS - DEMOLISHED 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 2021 disclosure (source record seattle:27528:2021). 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 LR (1-4) buildings in Seattle
- LAM-BOWS APTS (demolished - new building ID#24163)· 46,986 sq ft · EUI 24.1 kBtu/ft²
- The 8501 Condominiums· 45,421 sq ft
- DEVONSHIRE APTS- Demo'd 2023· 44,736 sq ft · score 24 (D)
- NOBA APARTMENTS· 43,998 sq ft · score 98 (A)
- PAUL REVERE APTS· 43,606 sq ft · score 100 (A)
- ELLENBERT APTS· 43,096 sq ft
- Multifamily LR (1-4) buildings in Seattle· 53 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 100 ROY ST APTS - DEMOLISHED's energy grade?
100 ROY ST APTS - DEMOLISHED scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2021 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 100 ROY ST APTS - DEMOLISHED use?
Its 2021 site energy-use intensity was 63.7 kBtu/ft² (96.3 kBtu/ft² source) across 53,280 sq ft, including 188,675 kWh of electricity and 17,950 therms of natural gas.
What are 100 ROY ST APTS - DEMOLISHED's carbon emissions?
100 ROY ST APTS - DEMOLISHED reported 99 tCO₂e of greenhouse-gas emissions for 2021.
Where is 100 ROY ST APTS - DEMOLISHED?
100 ROY ST APTS - DEMOLISHED is in Seattle, Washington 98109. Its coordinates are 47.62573, -122.35496 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 100 ROY ST APTS - DEMOLISHED and when was it built?
100 ROY ST APTS - DEMOLISHED has 53,280 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1948 as its year built. It is classed as multifamily LR (1-4).
Is 100 ROY ST APTS - DEMOLISHED covered by the Seattle Energy Benchmarking Ordinance (SMC 22.920)?
Yes — it appears in the 2021 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, “100 ROY ST APTS - DEMOLISHED, Seattle, Washington — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/100-roy-st-apts-demolished-5e06f123 (data as of October 2, 2026).