Property record

1 South Dearborn Street, Chicago

Office in Chicago, Illinois. It covers 29,183 square feet on the ground.

This building

1 South Dearborn Street, Chicago. Office in Chicago, Illinois. Property ID spmk3ke318mc58v.

Facts about 1 South Dearborn Street, Chicago
Fact	Value	Source
Address	1 South Dearborn Street, Chicago, IL 60603	USA Structures
Building type	Office	USA Structures and SkyPSI estimator
Footprint	29,183 square feet	USA Structures
Perimeter	686.89 feet	USA Structures
Height	570.87 feet	Overture Maps building footprints and Google Open Buildings
Stories	39 stories	Overture Maps building footprints and Google Open Buildings
Exterior wall area	392,124 square feet	SkyPSI estimator
Parcel number	17162060080000	County and state public records
Land use	591 Commercial/Industrial	County and state public records

Whole-building ranges from the SkyPSI estimator, calibrated October 2, 2026. Grade C: modelled from the Texas calibration. What the grades mean.

Exterior soft wash from a boom lift and by rope access, whole building
Service	Low	Most likely	High
Facade wash, conventional access	$60,500	$108,500	$181,000

Window cleaning by rope access, whole building
Service	Low	Most likely	High
Exterior windows, rope access	$80,500	$160,500	$281,000
Windows inside and out, rope access	$88,500	$176,500	$313,500

Exterior soft wash: Boom lift and Rope access fit this building at the same cost, most likely $108,500.
Window cleaning: Rope access fits this building, most likely $160,500.

Each fact names the source it comes from. A building file carries the source of each field, and SkyPSI shows that source beside the fact.

County and state public records: Situs addresses, parcel numbers, land use, year built and floor counts from county appraisal districts and state open data.
USA Structures: Building footprints, heights and occupancy from FEMA's USA Structures.
Google Open Buildings: Building outlines and heights from Google Open Buildings, reached through the Overture Maps buildings theme.
Overture Maps building footprints: Building outlines, heights and floor counts from the Overture Maps buildings theme.
SkyPSI estimator: SkyPSI's own price model, calibrated rates and building-class rules.

Cost ranges come from the SkyPSI estimator, calibrated October 2, 2026. How a SkyEstimate is built.

Ask SkyPSI for a quote on your building.

Sources: County and state public records, USA Structures, Google Open Buildings, Overture Maps building footprints, SkyPSI estimator.

An estimate, not a quote. How a SkyEstimate is built.