Northaven Ii
Senior Living Community in Seattle, WA · 528 NE NORTHGATE WAY · 98125
At a glance
Northaven Ii is a 21,620-square-foot senior living community building at 528 NE NORTHGATE WAY in Seattle, Washington, built in 1992. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 82 out of 100 (grade B), a site energy-use intensity of 69.5 kBtu/ft² and 50 tCO₂e of greenhouse-gas emissions. That score is higher than 50% of the 40 scored senior living community buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 82 (band B) |
| Site EUI | 69.5 kBtu/ft² |
| Source EUI | 130.3 kBtu/ft² |
| GHG emissions | 50 tCO₂e |
| GHG intensity | 2.0 kgCO₂e/ft² |
| Electricity | 234,392 kWh |
| Natural gas | 8,952 therms |
| Gross floor area | 21,620 sq ft |
| Source record | seattle:22961:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 82 | +5 | 69.5 kBtu/ft² | 50 tCO₂e |
| 2024 | 77 | +1 | 72.6 kBtu/ft² | 55 tCO₂e |
| 2023 | 76 | ±0 | 77.0 kBtu/ft² | 62 tCO₂e |
| 2022 | 76 | +3 | 81.4 kBtu/ft² | 70 tCO₂e |
| 2021 | 73 | -1 | 79.9 kBtu/ft² | 65 tCO₂e |
| 2020 | 74 | +1 | 77.5 kBtu/ft² | 63 tCO₂e |
| 2019 | 73 | +9 | 83.1 kBtu/ft² | 73 tCO₂e |
| 2018 | 64 | -8 | 88.5 kBtu/ft² | 77 tCO₂e |
| 2017 | 72 | 80.2 kBtu/ft² | 66 tCO₂e | |
| 2016 | — | 80.4 kBtu/ft² | 66 tCO₂e | |
| 2015 | — | 85.8 kBtu/ft² | 69 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
- 528 NE NORTHGATE WAY
- City
- Seattle
- State
- Washington
- ZIP
- 98125
- Coordinates
- 47.70930, -122.32177
Within ~1 km
Nearby benchmarked buildings
- Thornton Place (Parent Property)score 61
Multifamily Housing · 771,253 sq ft
- Northgate Northscore —
Mixed Use Property · 705,535 sq ft
- Modera Northgatescore 100
Multifamily Housing · 426,841 sq ft
Parking · 423,569 sq ft
- 525 At The Enclavescore 91
Multifamily Housing · 313,595 sq ft
Retail Store · 302,812 sq ft
See also: most efficient in Seattle · biggest emitters
How does Northaven Ii compare with other senior living community buildings in Seattle?
The latest disclosures cover 48 senior living community buildings in Seattle, out of 3,871 buildings citywide. Northaven Ii's ENERGY STAR score of 82 compares with an average of 72 across the 40 that report a score; it scores higher than 50% of them and lower than 48%. Its site EUI of 69.5 kBtu/ft² is roughly in line with the average of 66.7 kBtu/ft². Its emissions intensity of 2.0 kgCO₂e/ft² is about 20% above the group average of 1.7 kgCO₂e/ft².
At 21,620 sq ft, it is about 84% below the average floor area of 136,458 sq ft for those buildings. Its 1992 construction date is close to the group's average year built (1991). Across all 24 jurisdictions BuildingCensus covers, the 1,181 senior living community buildings average an ENERGY STAR score of 71 and a site EUI of 73.6 kBtu/ft².
How has Northaven Ii's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Northaven Ii, covering report years 2015–2025. Its ENERGY STAR score went from 72 in 2017 to 82 in 2025 (+10 points). Site EUI moved from 85.8 kBtu/ft² (2015) to 69.5 kBtu/ft² (2025), a 19% decrease. Reported emissions went from 69 tCO₂e to 50 tCO₂e over the same span (down 28%).
What does an ENERGY STAR score of 82 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 82 means the building performs better than about 82% of its national peers. BuildingCensus bands the score into report-card grades; 82 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. Northaven Ii's 69.5 kBtu/ft² across 21,620 sq ft works out to about 1.5 billion Btu (440 MWh-equivalent) in 2025. Its source EUI of 130.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 234,392 kWh of electricity and 8,952 therms of natural gas for the year.
Which law requires Northaven Ii to report its energy use?
Northaven Ii 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:22961:2025). 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 senior living community buildings in Seattle
Frequently asked questions
What is Northaven Ii's energy grade?
Northaven Ii scores 82 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 Northaven Ii use?
Its 2025 site energy-use intensity was 69.5 kBtu/ft² (130.3 kBtu/ft² source) across 21,620 sq ft, including 234,392 kWh of electricity and 8,952 therms of natural gas.
What are Northaven Ii's carbon emissions?
Northaven Ii reported 50 tCO₂e of greenhouse-gas emissions (2.0 kgCO₂e/ft²) for 2025.
Where is Northaven Ii?
Northaven Ii is at 528 NE NORTHGATE WAY, in Seattle, Washington 98125. Its coordinates are 47.70930, -122.32177 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Northaven Ii and when was it built?
Northaven Ii has 21,620 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1992 as its year built. It is classed as senior living community.
Is Northaven Ii 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, “Northaven Ii, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/northaven-ii-5d2522aa (data as of October 2, 2026).