BuildingCensus
A

1943 First Ave Building

Office in Seattle, WA · 1943 1ST AVE S · 98134

ENERGY STAR score
98
band A · 2025
Site EUI
18.1
kBtu/ft²
GHG emissions
4
tCO₂e
GHG intensity
0.1
kgCO₂e/ft²
Floor area
49,052
sq ft
Year built
1910
vintage
◆ Loading map…
85–10070–8455–691–54
This entry + 6 nearby

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

Benchmarking record

FieldValue
ENERGY STAR score98 (band A)
Site EUI18.1 kBtu/ft²
Source EUI50.7 kBtu/ft²
GHG emissions4 tCO₂e
GHG intensity0.1 kgCO₂e/ft²
Electricity225,087 kWh
Gross floor area49,052 sq ft
Source recordseattle:24822:2025

The disclosure history

Year over year

YearScoreΔSite EUIGHG emissions
2025latest98+118.1 kBtu/ft²4 tCO₂e
202497±020.3 kBtu/ft²5 tCO₂e
202397+121.3 kBtu/ft²5 tCO₂e
202296-122.9 kBtu/ft²6 tCO₂e
202197-120.6 kBtu/ft²5 tCO₂e
202098+218.5 kBtu/ft²5 tCO₂e
201996±021.8 kBtu/ft²5 tCO₂e
201896+322.8 kBtu/ft²6 tCO₂e
201793-324.4 kBtu/ft²6 tCO₂e
201696+634.0 kBtu/ft²8 tCO₂e
20159043.9 kBtu/ft²11 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.

Own or manage this building? Claim it to correct the record and get compliance alerts.

Location

Address
1943 1ST AVE S
State
Washington
ZIP
98134
Coordinates
47.58462, -122.33470

Within ~1 km

Nearby benchmarked buildings

See also: most efficient in Seattle · biggest emitters

Frequently asked questions

What is 1943 First Ave Building's energy grade?

1943 First Ave Building scores 98 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 1943 First Ave Building use?

Its 2025 site energy-use intensity was 18.1 kBtu/ft² (50.7 kBtu/ft² source) across 49,052 sq ft, including 225,087 kWh of electricity.

What are 1943 First Ave Building's carbon emissions?

1943 First Ave Building reported 4 tCO₂e of greenhouse-gas emissions (0.1 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.

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.

Dataset updated . Source: Building Energy Benchmarking disclosure, record seattle:24822:2025.