Gardner House
Multifamily Housing in Seattle, WA · 2870 S HANFORD ST · 98144
At a glance
Gardner House is a 40,000-square-foot multifamily housing building at 2870 S HANFORD ST in Seattle, Washington, built in 2019. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 32.5 kBtu/ft² and 65 tCO₂e of greenhouse-gas emissions. That score is higher than 52% 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 | 92 (band A) |
| Site EUI | 32.5 kBtu/ft² |
| Source EUI | 75.2 kBtu/ft² |
| GHG emissions | 65 tCO₂e |
| GHG intensity | 0.6 kgCO₂e/ft² |
| Electricity | 726,855 kWh |
| Natural gas | 9,511 therms |
| Gross floor area | 40,000 sq ft |
| Source record | seattle:50720:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 92 | +1 | 32.5 kBtu/ft² | 65 tCO₂e |
| 2024 | 91 | +2 | 34.0 kBtu/ft² | 65 tCO₂e |
| 2023 | 89 | +6 | 34.8 kBtu/ft² | 58 tCO₂e |
| 2022 | 83 | -13 | 38.6 kBtu/ft² | 65 tCO₂e |
| 2021 | 96 | 29.9 kBtu/ft² | 14 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
- 2870 S HANFORD ST
- City
- Seattle
- State
- Washington
- ZIP
- 98144
- Coordinates
- 47.57497, -122.29626
Within ~1 km
Nearby benchmarked buildings
- Lowes & Amazon Wscore 100
Mixed Use Property · 291,940 sq ft
K-12 School · 289,588 sq ft
- Dakota At Rainier Courtscore 95
Multifamily Housing · 289,471 sq ft
- Mount Baker Station - South Bldgscore 100
Multifamily Housing · 203,262 sq ft
- Courtland Place Apartmentsscore 92
Multifamily Housing · 193,946 sq ft
- Prologis Park 15score —
Non-Refrigerated Warehouse · 166,014 sq ft
See also: most efficient in Seattle · biggest emitters
How does Gardner 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. Gardner House's ENERGY STAR score of 92 compares with an average of 83 across the 1,652 that report a score; it scores higher than 52% of them and lower than 45%. Its site EUI of 32.5 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 0.6 kgCO₂e/ft² is about 13% below the group average of 0.7 kgCO₂e/ft².
At 40,000 sq ft, it is about half of the average floor area of 86,468 sq ft for those buildings. It was built in 2019, 36 years later 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 Gardner House's energy performance changed over time?
BuildingCensus holds 5 Seattle disclosures for Gardner House, covering report years 2021–2025. Its ENERGY STAR score went from 96 in 2021 to 92 in 2025 (-4 points); its best year on file was 2021, at 96. Site EUI moved from 29.9 kBtu/ft² (2021) to 32.5 kBtu/ft² (2025), an 9% increase. Reported emissions went from 14 tCO₂e to 65 tCO₂e over the same span (up 374%).
What does an ENERGY STAR score of 92 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 92 means the building performs better than about 92% of its national peers. BuildingCensus bands the score into report-card grades; 92 falls in band A — high performer (85–100). 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. Gardner House's 32.5 kBtu/ft² across 40,000 sq ft works out to about 1.3 billion Btu (381 MWh-equivalent) in 2025. Its source EUI of 75.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 726,855 kWh of electricity and 9,511 therms of natural gas for the year.
Which law requires Gardner House to report its energy use?
Gardner 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:50720:2025). 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
- 423 Terry· 39,990 sq ft · score 98 (A)
- Northern Lights Condominium· 39,967 sq ft · score 73 (B)
- Ashbury Condominium· 39,966 sq ft · EUI 4.3 kBtu/ft²
- Traugott Terrace· 39,962 sq ft · score 89 (A)
- Ten Twenty· 39,895 sq ft · score 75 (B)
- Seaview Terrace Condominium· 39,888 sq ft · score 46 (D)
- 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 Gardner House's energy grade?
Gardner House scores 92 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Gardner House use?
Its 2025 site energy-use intensity was 32.5 kBtu/ft² (75.2 kBtu/ft² source) across 40,000 sq ft, including 726,855 kWh of electricity and 9,511 therms of natural gas.
What are Gardner House's carbon emissions?
Gardner House reported 65 tCO₂e of greenhouse-gas emissions (0.6 kgCO₂e/ft²) for 2025.
Where is Gardner House?
Gardner House is at 2870 S HANFORD ST, in Seattle, Washington 98144. Its coordinates are 47.57497, -122.29626 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Gardner House and when was it built?
Gardner House has 40,000 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2019 as its year built. It is classed as multifamily housing.
Is Gardner 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).
Working with Seattle building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Gardner House, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/gardner-house-253a6750 (data as of October 2, 2026).