Sigma Chi Fraternity
Residence Hall/Dormitory in Seattle, WA · 4505 18TH AVE NE · 98105
At a glance
Sigma Chi Fraternity is a 23,616-square-foot residence hall/dormitory at 4505 18TH AVE NE in Seattle, Washington, built in 1926.
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 | 76,299 kWh |
| Gross floor area | 23,616 sq ft |
| Source record | seattle:26911:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | 82 | +28 | 52.7 kBtu/ft² | 42 tCO₂e |
| 2023 | 54 | +3 | 81.6 kBtu/ft² | 70 tCO₂e |
| 2022 | 51 | -10 | 85.7 kBtu/ft² | 72 tCO₂e |
| 2021 | 61 | -7 | 75.1 kBtu/ft² | 62 tCO₂e |
| 2020 | 68 | +9 | 66.4 kBtu/ft² | 54 tCO₂e |
| 2019 | 59 | -9 | 68.4 kBtu/ft² | 50 tCO₂e |
| 2018 | 68 | +4 | 58.5 kBtu/ft² | 39 tCO₂e |
| 2017 | 64 | +9 | 67.9 kBtu/ft² | 49 tCO₂e |
| 2016 | 55 | +6 | 70.1 kBtu/ft² | 53 tCO₂e |
| 2015 | 49 | 78.8 kBtu/ft² | 64 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
- 4505 18TH AVE NE
- City
- Seattle
- State
- Washington
- ZIP
- 98105
- Coordinates
- 47.66164, -122.30874
Within ~1 km
Nearby benchmarked buildings
College/University · 15,216,474 sq ft
- The Standard At Seattlescore 100
Multifamily Housing · 612,844 sq ft
- Trailside - Student Housingscore —
Multifamily Housing · 448,353 sq ft
- Uw Tower Bldg Complexscore —
College/University · 417,035 sq ft
Multifamily Housing · 411,067 sq ft
- Arista Residencesscore 99
Multifamily Housing · 333,773 sq ft
See also: most efficient in Seattle · biggest emitters
How does Sigma Chi Fraternity compare with other residence hall/dormitory buildings in Seattle?
The latest disclosures cover 13 residence hall/dormitory buildings in Seattle, out of 3,871 buildings citywide.
At 23,616 sq ft, it is about 71% below the average floor area of 82,288 sq ft for those buildings. It was built in 1926, 36 years earlier than the group's average year built (1962). Across all 24 jurisdictions BuildingCensus covers, the 702 residence hall/dormitory buildings average an ENERGY STAR score of 70 and a site EUI of 70.7 kBtu/ft².
How has Sigma Chi Fraternity's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Sigma Chi Fraternity, covering report years 2015–2025. Its ENERGY STAR score went from 49 in 2015 to 82 in 2024 (+33 points). Site EUI moved from 78.8 kBtu/ft² (2015) to 52.7 kBtu/ft² (2024), a 33% decrease. Reported emissions went from 64 tCO₂e to 42 tCO₂e over the same span (down 34%).
Which law requires Sigma Chi Fraternity to report its energy use?
Sigma Chi Fraternity 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:26911:2025). 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 residence hall/dormitory buildings in Seattle
- Phi Gamma Delta Fraternity· 22,124 sq ft · score 51 (D)
- Phi Delta Theta· 21,499 sq ft · score 97 (A)
- Alpha Chi Omega Sorority· 20,008 sq ft · score 76 (B)
- 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 Sigma Chi Fraternity's energy grade?
Sigma Chi Fraternity did not report an ENERGY STAR score in its 2025 disclosure.
How much energy does Sigma Chi Fraternity use?
No energy-use intensity was reported for 2025.
What are Sigma Chi Fraternity's carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is Sigma Chi Fraternity?
Sigma Chi Fraternity is at 4505 18TH AVE NE, in Seattle, Washington 98105. Its coordinates are 47.66164, -122.30874 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Sigma Chi Fraternity and when was it built?
Sigma Chi Fraternity has 23,616 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1926 as its year built. It is classed as residence hall/dormitory.
Is Sigma Chi Fraternity 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, “Sigma Chi Fraternity, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/sigma-chi-fraternity-20d4ce31 (data as of October 2, 2026).