Mad Flats
Multifamily Housing in Seattle, WA · 1523 E MADISON ST · 98122
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 70 (band B) |
| Site EUI | 79.3 kBtu/ft² |
| Source EUI | 147.2 kBtu/ft² |
| GHG emissions | 51 tCO₂e |
| GHG intensity | 2.5 kgCO₂e/ft² |
| Electricity | 223,209 kWh |
| Natural gas | 8,904 therms |
| Gross floor area | 20,838 sq ft |
| Source record | seattle:50272:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 70 | 79.3 kBtu/ft² | 51 tCO₂e | |
| 2024 | — | — | — | |
| 2023 | 94 | +4 | 62.0 kBtu/ft² | 21 tCO₂e |
| 2022 | 90 | -7 | 67.2 kBtu/ft² | 22 tCO₂e |
| 2021 | 97 | +4 | 61.0 kBtu/ft² | 24 tCO₂e |
| 2020 | 93 | -5 | 63.8 kBtu/ft² | 23 tCO₂e |
| 2019 | 98 | +2 | 56.5 kBtu/ft² | 22 tCO₂e |
| 2018 | 96 | -4 | 62.2 kBtu/ft² | 24 tCO₂e |
| 2017 | 100 | 54.6 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
- 1523 E MADISON ST
- City
- Seattle
- State
- Washington
- ZIP
- 98122
- Coordinates
- 47.61469, -122.31171
Within ~1 km
Nearby benchmarked buildings
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- Broadstone Infinity Apartmentsscore 91
Multifamily Housing · 278,554 sq ft
- Rianna Apts & Retailscore 46
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Multifamily Housing · 183,379 sq ft
See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is Mad Flats's energy grade?
Mad Flats scores 70 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 Mad Flats use?
Its 2025 site energy-use intensity was 79.3 kBtu/ft² (147.2 kBtu/ft² source) across 20,838 sq ft, including 223,209 kWh of electricity and 8,904 therms of natural gas.
What are Mad Flats's carbon emissions?
Mad Flats reported 51 tCO₂e of greenhouse-gas emissions (2.5 kgCO₂e/ft²) for 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.
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Dataset updated . Source: Building Energy Benchmarking disclosure, record seattle:50272:2025.