BuildingCensus
B

One South Dearborn

Office in Chicago, IL · 1 South Dearborn · 60603

ENERGY STAR score
81
band B · 2023
Site EUI
41.9
kBtu/ft²
GHG emissions
5,533
tCO₂e
GHG intensity
5.9
kgCO₂e/ft²
Floor area
942,732
sq ft
Year built
2005
vintage
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85–10070–8455–691–54
This entry + 6 nearby

Building Energy Use Benchmarking Ordinance · reporting year 2023

Benchmarking record

FieldValue
ENERGY STAR score81 (band B)
Site EUI41.9 kBtu/ft²
Source EUI117.4 kBtu/ft²
GHG emissions5,533 tCO₂e
GHG intensity5.9 kgCO₂e/ft²
Electricity11,588,682 kWh
Water use6,059 kgal
Gross floor area942,732 sq ft
Source recordchicago:101739:2023

The disclosure history

Year over year

YearScoreΔSite EUIGHG emissions
2023latest81+141.9 kBtu/ft²5,533 tCO₂e
202280-443.6 kBtu/ft²5,417 tCO₂e
202184±040.5 kBtu/ft²5,459 tCO₂e
20208441.1 kBtu/ft²6,042 tCO₂e
2019———
201869-1752.7 kBtu/ft²8,270 tCO₂e
201786+255.8 kBtu/ft²9,729 tCO₂e
201684±058.4 kBtu/ft²10,143 tCO₂e
201584+158.1 kBtu/ft²10,996 tCO₂e
20148361.0 kBtu/ft²11,450 tCO₂e

Compliance context

Building Energy Use Benchmarking Ordinance

Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.

Program details →

Ownership

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

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Location

Address
1 South Dearborn
State
Illinois
ZIP
60603
Coordinates
41.88003, -87.65938

Within ~1 km

Nearby benchmarked buildings

See also: most efficient in Chicago · biggest emitters

Frequently asked questions

What is One South Dearborn's energy grade?

One South Dearborn scores 81 out of 100 on ENERGY STAR — band B (Above median (70–84)) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.

How much energy does One South Dearborn use?

Its 2023 site energy-use intensity was 41.9 kBtu/ft² (117.4 kBtu/ft² source) across 942,732 sq ft, including 11,588,682 kWh of electricity.

What are One South Dearborn's carbon emissions?

One South Dearborn reported 5,533 tCO₂e of greenhouse-gas emissions (5.9 kgCO₂e/ft²) for 2023. Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.

Working with Chicago 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: Chicago Energy Benchmarking disclosure, record chicago:101739:2023.