Independent coverage of Illinois housing, remodeling & residential developmentThursday, October 29, 2026
Illinois Remodeling & Development Network

Illinois housing stock · public data

How Old Is Illinois Housing?

Most of what Illinois renovates was built before the rules that now govern remodeling. This page counts every housing unit by the era it was built, county by county.

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Independent — not a government agency. Estimates from the U.S. Census Bureau.

A large late-nineteenth-century house with a broad front porch in Urbana, Illinois.
A late-19th-century house in Urbana. Illinois has 1.1 million homes built before 1940 — most of the stock a renovator will actually touch.Photo: Dori · CC BY-SA 3.0 US · View original sourcehttps://commons.wikimedia.org/wiki/File:KappaKappaGammaSororityHouse_Urbana_Illinois_4419.jpg