Hong Kong Building & Apts
Multifamily Housing in Seattle, WA · 507 MAYNARD AVE S · 98104
At a glance
Hong Kong Building & Apts is a 39,493-square-foot multifamily housing building at 507 MAYNARD AVE S in Seattle, Washington, built in 1927. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 48.2 kBtu/ft² and 9 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 48.2 kBtu/ft² |
| Source EUI | 135.0 kBtu/ft² |
| GHG emissions | 9 tCO₂e |
| GHG intensity | 0.3 kgCO₂e/ft² |
| Electricity | 462,247 kWh |
| Gross floor area | 39,493 sq ft |
| Source record | seattle:43867:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 48.2 kBtu/ft² | 9 tCO₂e | |
| 2024 | — | 54.3 kBtu/ft² | 10 tCO₂e | |
| 2023 | — | 55.5 kBtu/ft² | 11 tCO₂e | |
| 2022 | — | 53.6 kBtu/ft² | 10 tCO₂e | |
| 2021 | — | 46.2 kBtu/ft² | 176 tCO₂e | |
| 2020 | — | 118.8 kBtu/ft² | 140 tCO₂e | |
| 2019 | — | 178.7 kBtu/ft² | 236 tCO₂e | |
| 2018 | — | 133.7 kBtu/ft² | 165 tCO₂e | |
| 2017 | — | 122.2 kBtu/ft² | 145 tCO₂e | |
| 2016 | — | 126.4 kBtu/ft² | 154 tCO₂e | |
| 2015 | 2 | 151.4 kBtu/ft² | 196 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
- 507 MAYNARD AVE S
- City
- Seattle
- State
- Washington
- ZIP
- 98104
- Coordinates
- 47.59801, -122.32544
Within ~1 km
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How does Hong Kong Building & Apts 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. Its site EUI of 48.2 kBtu/ft² is about 38% 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 0.3 kgCO₂e/ft² is about 60% below the group average of 0.7 kgCO₂e/ft².
At 39,493 sq ft, it is about half of the average floor area of 86,468 sq ft for those buildings. It was built in 1927, 56 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 Hong Kong Building & Apts's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Hong Kong Building & Apts, covering report years 2015–2025. Site EUI moved from 151.4 kBtu/ft² (2015) to 48.2 kBtu/ft² (2025), a 68% decrease. Reported emissions went from 196 tCO₂e to 9 tCO₂e over the same span (down 95%).
What does a site EUI of 48.2 kBtu/ft² mean?
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. Hong Kong Building & Apts's 48.2 kBtu/ft² across 39,493 sq ft works out to about 1.9 billion Btu (558 MWh-equivalent) in 2025. Its source EUI of 135.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 462,247 kWh of electricity for the year.
Which law requires Hong Kong Building & Apts to report its energy use?
Hong Kong Building & Apts 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:43867:2025). 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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- Fairhaven Apts· 39,319 sq ft · score 79 (B)
- Cheryl Chow Court· 39,286 sq ft · score 68 (C)
- The Publix Apartments (Fmr Historic Hotel)· 39,279 sq ft · score 18 (D)
- Novo Seattle· 39,272 sq ft · score 100 (A)
- Multifamily Housing buildings in Seattle· 1,971 benchmarked
- All Seattle benchmarked buildings· Seattle Energy Benchmarking Ordinance (SMC 22.920)
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- Least efficient large buildings in Seattle
- Biggest emitters in Seattle
Frequently asked questions
What is Hong Kong Building & Apts's energy grade?
Hong Kong Building & Apts did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 48.2 kBtu/ft².
How much energy does Hong Kong Building & Apts use?
Its 2025 site energy-use intensity was 48.2 kBtu/ft² (135.0 kBtu/ft² source) across 39,493 sq ft, including 462,247 kWh of electricity.
What are Hong Kong Building & Apts's carbon emissions?
Hong Kong Building & Apts reported 9 tCO₂e of greenhouse-gas emissions (0.3 kgCO₂e/ft²) for 2025.
Where is Hong Kong Building & Apts?
Hong Kong Building & Apts is at 507 MAYNARD AVE S, in Seattle, Washington 98104. Its coordinates are 47.59801, -122.32544 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Hong Kong Building & Apts and when was it built?
Hong Kong Building & Apts has 39,493 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1927 as its year built. It is classed as multifamily housing.
Is Hong Kong Building & Apts 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, “Hong Kong Building & Apts, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/hong-kong-building-apts-6933e62b (data as of October 2, 2026).