Property record

800 Porter Street, Lemont

School in Lemont, Illinois. It covers 208,640 square feet on the ground.

This building

800 Porter Street, Lemont. School in Lemont, Illinois. Property ID sp5p7s8ntpkstvm.

Facts about 800 Porter Street, Lemont
Fact	Value	Source
Address	800 Porter Street, Lemont, IL 60439	USA Structures
Building type	School	USA Structures and SkyPSI estimator
Place name	Lemont High School	Overture Maps places
Place type	high school	Overture Maps places
Footprint	208,640 square feet	USA Structures
Perimeter	3,319.34 feet	USA Structures
Height	25.72 feet	USA Structures
Stories	2 stories	USA Structures
Exterior wall area	85,379 square feet	SkyPSI estimator
Parcel number	22204390320000	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	$13,000	$23,500	$39,500

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.
Overture Maps places: Business and place names from the Overture Maps places 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, Overture Maps places, SkyPSI estimator.

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