MERCER COURT APARTMENTS
Multifamily LR (1-4) in Seattle, WA · 527 12TH AVE E · 98102
At a glance
MERCER COURT APARTMENTS is a 26,578-square-foot multifamily LR (1-4) building at 527 12TH AVE E in Seattle, Washington, built in 1998. In its 2023 Seattle benchmarking disclosure it reported an ENERGY STAR score of 60 out of 100 (grade C), a site energy-use intensity of 54.7 kBtu/ft² and 27 tCO₂e of greenhouse-gas emissions. That score is higher than 28% of the 25 scored multifamily LR (1-4) buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 60 (band C) |
| Site EUI | 54.7 kBtu/ft² |
| Source EUI | 112.0 kBtu/ft² |
| GHG emissions | 27 tCO₂e |
| GHG intensity | 1.4 kgCO₂e/ft² |
| Electricity | 169,565 kWh |
| Natural gas | 4,384 therms |
| Gross floor area | 26,578 sq ft |
| Source record | seattle:25305:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 60 | +6 | 54.7 kBtu/ft² | 27 tCO₂e |
| 2022 | 54 | -3 | 57.3 kBtu/ft² | 27 tCO₂e |
| 2021 | 57 | -17 | 57.2 kBtu/ft² | 29 tCO₂e |
| 2020 | 74 | +3 | 50.2 kBtu/ft² | 26 tCO₂e |
| 2019 | 71 | -1 | 51.1 kBtu/ft² | 26 tCO₂e |
| 2018 | 72 | -9 | 48.7 kBtu/ft² | 23 tCO₂e |
| 2017 | 81 | +17 | 47.3 kBtu/ft² | 23 tCO₂e |
| 2016 | 64 | -13 | 49.4 kBtu/ft² | 23 tCO₂e |
| 2015 | 77 | 46.8 kBtu/ft² | 24 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
- 527 12TH AVE E
- City
- Seattle
- State
- Washington
- ZIP
- 98102
- Coordinates
- 47.62413, -122.31698
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does MERCER COURT APARTMENTS compare with other multifamily LR (1-4) buildings in Seattle?
The latest disclosures cover 53 multifamily LR (1-4) buildings in Seattle, out of 3,871 buildings citywide. MERCER COURT APARTMENTS's ENERGY STAR score of 60 compares with an average of 73 across the 25 that report a score; it scores higher than 28% of them and lower than 68%. Its site EUI of 54.7 kBtu/ft² is about 36% above the average of 40.1 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 1.4 kgCO₂e/ft² is about 59% above the group average of 0.9 kgCO₂e/ft².
At 26,578 sq ft, it is about 42% below the average floor area of 45,933 sq ft for those buildings. It was built in 1998, 22 years later than the group's average year built (1976).
How has MERCER COURT APARTMENTS's energy performance changed over time?
BuildingCensus holds 9 Seattle disclosures for MERCER COURT APARTMENTS, covering report years 2015–2023. Its ENERGY STAR score went from 77 in 2015 to 60 in 2023 (-17 points); its best year on file was 2017, at 81. Site EUI moved from 46.8 kBtu/ft² (2015) to 54.7 kBtu/ft² (2023), an 17% increase. Reported emissions went from 24 tCO₂e to 27 tCO₂e over the same span (up 13%).
What does an ENERGY STAR score of 60 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 60 means the building performs better than about 60% of its national peers. BuildingCensus bands the score into report-card grades; 60 falls in band C — below median (55–69). It sits 15 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. MERCER COURT APARTMENTS's 54.7 kBtu/ft² across 26,578 sq ft works out to about 1.5 billion Btu (426 MWh-equivalent) in 2023. Its source EUI of 112.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 169,565 kWh of electricity and 4,384 therms of natural gas for the year.
Which law requires MERCER COURT APARTMENTS to report its energy use?
MERCER COURT APARTMENTS 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 2023 disclosure (source record seattle:25305:2023). 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 LR (1-4) buildings in Seattle
- EASTLAKE LOFTS· 26,375 sq ft
- SKYVIEW TERRACE APTS· 26,211 sq ft · score 94 (A)
- TRAILSIDE APTS- demolished· 26,157 sq ft · score 100 (A)
- VILLA COSTELLA CONDOMINIUM· 25,368 sq ft
- SAGAMORE BUILDING· 24,722 sq ft · EUI 32.6 kBtu/ft²
- MULTI RES· 24,153 sq ft · EUI 28.7 kBtu/ft²
- Multifamily LR (1-4) buildings in Seattle· 53 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 MERCER COURT APARTMENTS's energy grade?
MERCER COURT APARTMENTS scores 60 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does MERCER COURT APARTMENTS use?
Its 2023 site energy-use intensity was 54.7 kBtu/ft² (112.0 kBtu/ft² source) across 26,578 sq ft, including 169,565 kWh of electricity and 4,384 therms of natural gas.
What are MERCER COURT APARTMENTS's carbon emissions?
MERCER COURT APARTMENTS reported 27 tCO₂e of greenhouse-gas emissions (1.4 kgCO₂e/ft²) for 2023.
Where is MERCER COURT APARTMENTS?
MERCER COURT APARTMENTS is at 527 12TH AVE E, in Seattle, Washington 98102. Its coordinates are 47.62413, -122.31698 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is MERCER COURT APARTMENTS and when was it built?
MERCER COURT APARTMENTS has 26,578 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1998 as its year built. It is classed as multifamily LR (1-4).
Is MERCER COURT APARTMENTS covered by the Seattle Energy Benchmarking Ordinance (SMC 22.920)?
Yes — it appears in the 2023 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, “MERCER COURT APARTMENTS, Seattle, Washington — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/mercer-court-apartments-b2244d1a (data as of October 2, 2026).