BuildingCensus
A

Pioneer Building

Office in Seattle, WA · 600 1ST AVE · 98104

ENERGY STAR score
89
band A · 2025
Site EUI
43.0
kBtu/ft²
GHG emissions
34
tCO₂e
GHG intensity
0.4
kgCO₂e/ft²
Floor area
89,355
sq ft
Year built
1900
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 score89 (band A)
Site EUI43.0 kBtu/ft²
Source EUI115.7 kBtu/ft²
GHG emissions34 tCO₂e
GHG intensity0.4 kgCO₂e/ft²
Electricity1,055,136 kWh
Natural gas2,428 therms
Gross floor area89,355 sq ft
Source recordseattle:340:2025

The disclosure history

Year over year

YearScoreΔSite EUIGHG emissions
2025latest89+143.0 kBtu/ft²34 tCO₂e
202488+143.4 kBtu/ft²31 tCO₂e
202387-345.2 kBtu/ft²30 tCO₂e
20229040.2 kBtu/ft²23 tCO₂e
2021———
2020———
2019100+4612.5 kBtu/ft²9 tCO₂e
201854-1544.0 kBtu/ft²25 tCO₂e
201769+346.1 kBtu/ft²26 tCO₂e
201666+1146.8 kBtu/ft²27 tCO₂e
20155553.1 kBtu/ft²32 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
600 1ST AVE
State
Washington
ZIP
98104
Coordinates
47.60219, -122.33347

Within ~1 km

Nearby benchmarked buildings

See also: most efficient in Seattle · biggest emitters

Frequently asked questions

What is Pioneer Building's energy grade?

Pioneer Building scores 89 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 Pioneer Building use?

Its 2025 site energy-use intensity was 43.0 kBtu/ft² (115.7 kBtu/ft² source) across 89,355 sq ft, including 1,055,136 kWh of electricity and 2,428 therms of natural gas.

What are Pioneer Building's carbon emissions?

Pioneer Building reported 34 tCO₂e of greenhouse-gas emissions (0.4 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:340:2025.