Terrace Crest Apt's
Multifamily Housing in Seattle, WA · 517 9TH AVE · 98104
At a glance
Terrace Crest Apt's is a 32,688-square-foot multifamily housing building at 517 9TH AVE in Seattle, Washington, built in 1930. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 79 out of 100 (grade B), a site energy-use intensity of 53.4 kBtu/ft² and 66 tCO₂e of greenhouse-gas emissions. That score is higher than 27% 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 | 79 (band B) |
| Site EUI | 53.4 kBtu/ft² |
| Source EUI | 76.1 kBtu/ft² |
| GHG emissions | 66 tCO₂e |
| GHG intensity | 2.3 kgCO₂e/ft² |
| Electricity | 98,319 kWh |
| Natural gas | 12,338 therms |
| Gross floor area | 32,688 sq ft |
| Source record | seattle:23285:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 79 | ±0 | 53.4 kBtu/ft² | 66 tCO₂e |
| 2024 | 79 | +20 | 54.4 kBtu/ft² | 70 tCO₂e |
| 2023 | 59 | +36 | 68.6 kBtu/ft² | 93 tCO₂e |
| 2022 | 23 | +18 | 93.9 kBtu/ft² | 132 tCO₂e |
| 2021 | 5 | -91 | 121.7 kBtu/ft² | 178 tCO₂e |
| 2020 | 96 | +12 | 38.9 kBtu/ft² | 47 tCO₂e |
| 2019 | 84 | +14 | 52.0 kBtu/ft² | 68 tCO₂e |
| 2018 | 70 | -16 | 52.8 kBtu/ft² | 62 tCO₂e |
| 2017 | 86 | +12 | 54.1 kBtu/ft² | 72 tCO₂e |
| 2016 | 74 | +14 | 58.6 kBtu/ft² | 78 tCO₂e |
| 2015 | 60 | 62.6 kBtu/ft² | 81 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
- 517 9TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98104
- Coordinates
- 47.60523, -122.32490
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Terrace Crest Apt's 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. Terrace Crest Apt's's ENERGY STAR score of 79 compares with an average of 83 across the 1,652 that report a score; it scores higher than 27% of them and lower than 71%. Its site EUI of 53.4 kBtu/ft² is about 53% above the average of 34.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 2.3 kgCO₂e/ft² is about 221% above the group average of 0.7 kgCO₂e/ft².
At 32,688 sq ft, it is about 62% below the average floor area of 86,468 sq ft for those buildings. It was built in 1930, 53 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 Terrace Crest Apt's's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Terrace Crest Apt's, covering report years 2015–2025. Its ENERGY STAR score went from 60 in 2015 to 79 in 2025 (+19 points); its best year on file was 2020, at 96. Site EUI moved from 62.6 kBtu/ft² (2015) to 53.4 kBtu/ft² (2025), a 15% decrease. Reported emissions went from 81 tCO₂e to 66 tCO₂e over the same span (down 19%).
What does an ENERGY STAR score of 79 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 79 means the building performs better than about 79% of its national peers. BuildingCensus bands the score into report-card grades; 79 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. Terrace Crest Apt's's 53.4 kBtu/ft² across 32,688 sq ft works out to about 1.7 billion Btu (512 MWh-equivalent) in 2025. Its source EUI of 76.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 98,319 kWh of electricity and 12,338 therms of natural gas for the year.
Which law requires Terrace Crest Apt's to report its energy use?
Terrace Crest Apt's 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:23285:2025). 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
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- 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 Terrace Crest Apt's's energy grade?
Terrace Crest Apt's scores 79 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Terrace Crest Apt's use?
Its 2025 site energy-use intensity was 53.4 kBtu/ft² (76.1 kBtu/ft² source) across 32,688 sq ft, including 98,319 kWh of electricity and 12,338 therms of natural gas.
What are Terrace Crest Apt's's carbon emissions?
Terrace Crest Apt's reported 66 tCO₂e of greenhouse-gas emissions (2.3 kgCO₂e/ft²) for 2025.
Where is Terrace Crest Apt's?
Terrace Crest Apt's is at 517 9TH AVE, in Seattle, Washington 98104. Its coordinates are 47.60523, -122.32490 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Terrace Crest Apt's and when was it built?
Terrace Crest Apt's has 32,688 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1930 as its year built. It is classed as multifamily housing.
Is Terrace Crest Apt's 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, “Terrace Crest Apt's, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/terrace-crest-apt-s-f1b0015d (data as of October 2, 2026).