Property record

4747 South Union Avenue, Chicago

School in Chicago, Illinois. It covers 3,780 square feet on the ground.

This building

4747 South Union Avenue, Chicago. School in Chicago, Illinois. Property ID sp86w30h1esq7p7.

Facts about 4747 South Union Avenue, Chicago
Fact	Value	Source
Address	4747 South Union Avenue, Chicago, IL 60609	USA Structures
Building type	School	USA Structures and SkyPSI estimator
Footprint	3,780 square feet	USA Structures
Perimeter	289.89 feet	USA Structures
Height	18.31 feet	USA Structures
Stories	1 story	USA Structures
Exterior wall area	5,307 square feet	SkyPSI estimator
Parcel number	20091040010000	County and state public records
Land use	EX Exempt Property	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, whole building
Service	Low	Most likely	High
Facade wash, conventional access	$1,000	$1,500	$2,500

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.
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, SkyPSI estimator.

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