Elevated prices thanks to low inventory continued to create problems for Illinois homebuyers in November.

Families rely on single-family homes. Illinois must relax zoning laws and lower minimum lot sizes to make them more affordable statewide.

As housing prices continue to soar out of reach for more Americans, an impulse from policy makers across the country has been to attempt to mandate “affordable” prices through legislation. One common idea is rent control, which limits how much landlords can increase rents on residents. A related one is inclusionary zoning, which forces developers...