BuildingCensus
D

Sanford Hildebrandt Towers Ii

Multifamily Housing in Seattle, WA · 751 N 135TH ST · 98133

At a glance

Sanford Hildebrandt Towers Ii is a 56,800-square-foot multifamily housing building at 751 N 135TH ST in Seattle, Washington, built in 1984. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 50 out of 100 (grade D), a site energy-use intensity of 37.2 kBtu/ft² and 27 tCO₂e of greenhouse-gas emissions. That score is higher than 8% of the 1,652 scored multifamily housing buildings in Seattle.

ENERGY STAR score
50
band D · 2025
Site EUI
37.2
kBtu/ft²
GHG emissions
27
tCO₂e
GHG intensity
0.5
kgCO₂e/ft²
Floor area
56,800
sq ft
Year built
1984
vintage
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85–10070–8455–691–54
This entry + 6 nearby

Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025

Benchmarking record

FieldValue
ENERGY STAR score50 (band D)
Site EUI37.2 kBtu/ft²
Source EUI94.2 kBtu/ft²
GHG emissions27 tCO₂e
GHG intensity0.5 kgCO₂e/ft²
Electricity524,349 kWh
Natural gas3,229 therms
Gross floor area56,800 sq ft
Source recordseattle:36087:2025

The disclosure history

Year over year

YearScoreΔSite EUIGHG emissions
2025latest50+437.2 kBtu/ft²27 tCO₂e
202446-938.5 kBtu/ft²35 tCO₂e
202355-136.4 kBtu/ft²30 tCO₂e
202256-436.8 kBtu/ft²27 tCO₂e
202160-136.2 kBtu/ft²28 tCO₂e
202061-1536.3 kBtu/ft²34 tCO₂e
201976-534.5 kBtu/ft²39 tCO₂e
201881+633.8 kBtu/ft²41 tCO₂e
201775+137.8 kBtu/ft²52 tCO₂e
201674+135.4 kBtu/ft²47 tCO₂e
20157335.5 kBtu/ft²47 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.

Program details →

Ownership

No owning organisation shown. Names of private individuals in the disclosure are not published here.

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Location

Address
751 N 135TH ST
State
Washington
ZIP
98133
Coordinates
47.72664, -122.34823

Within ~1 km

Nearby benchmarked buildings

See also: most efficient in Seattle · biggest emitters

How does Sanford Hildebrandt Towers Ii 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. Sanford Hildebrandt Towers Ii's ENERGY STAR score of 50 compares with an average of 83 across the 1,652 that report a score; it scores higher than 8% of them and lower than 92%. Its site EUI of 37.2 kBtu/ft² is roughly in line with the average of 34.9 kBtu/ft². Its emissions intensity of 0.5 kgCO₂e/ft² is about 31% below the group average of 0.7 kgCO₂e/ft².

At 56,800 sq ft, it is about 34% below the average floor area of 86,468 sq ft for those buildings. Its 1984 construction date is close to 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 Sanford Hildebrandt Towers Ii's energy performance changed over time?

BuildingCensus holds 11 Seattle disclosures for Sanford Hildebrandt Towers Ii, covering report years 2015–2025. Its ENERGY STAR score went from 73 in 2015 to 50 in 2025 (-23 points); its best year on file was 2018, at 81. Site EUI moved from 35.5 kBtu/ft² (2015) to 37.2 kBtu/ft² (2025), an 5% increase. Reported emissions went from 47 tCO₂e to 27 tCO₂e over the same span (down 43%).

What does an ENERGY STAR score of 50 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 50 means the building performs better than about 50% of its national peers. BuildingCensus bands the score into report-card grades; 50 falls in band D — lowest band (1–54). It sits 25 points below 75, the threshold for ENERGY STAR certification. 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. Sanford Hildebrandt Towers Ii's 37.2 kBtu/ft² across 56,800 sq ft works out to about 2.1 billion Btu (619 MWh-equivalent) in 2025. Its source EUI of 94.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 524,349 kWh of electricity and 3,229 therms of natural gas for the year.

Which law requires Sanford Hildebrandt Towers Ii to report its energy use?

Sanford Hildebrandt Towers 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:36087:2025). 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

Frequently asked questions

What is Sanford Hildebrandt Towers Ii's energy grade?

Sanford Hildebrandt Towers Ii scores 50 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.

How much energy does Sanford Hildebrandt Towers Ii use?

Its 2025 site energy-use intensity was 37.2 kBtu/ft² (94.2 kBtu/ft² source) across 56,800 sq ft, including 524,349 kWh of electricity and 3,229 therms of natural gas.

What are Sanford Hildebrandt Towers Ii's carbon emissions?

Sanford Hildebrandt Towers Ii reported 27 tCO₂e of greenhouse-gas emissions (0.5 kgCO₂e/ft²) for 2025.

Where is Sanford Hildebrandt Towers Ii?

Sanford Hildebrandt Towers Ii is at 751 N 135TH ST, in Seattle, Washington 98133. Its coordinates are 47.72664, -122.34823 (latitude, longitude), as published in the Building Energy Benchmarking file.

How big is Sanford Hildebrandt Towers Ii and when was it built?

Sanford Hildebrandt Towers Ii has 56,800 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1984 as its year built. It is classed as multifamily housing.

Is Sanford Hildebrandt Towers 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, “Sanford Hildebrandt Towers Ii, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/sanford-hildebrandt-towers-ii-fb1fa878 (data as of October 2, 2026).