Illinois Land Use & Zoning
Practice Questions & Answers (2026)

Explanation

Depending on the nature of the proposed use: a variance allows deviation from dimensional standards (setbacks, height); a special use permit allows uses that are conditionally permitted in the zone; and rezoning changes the property's zoning classification. The appropriate action depends on the specific circumstances.

Explanation

A nonconforming use is a land use that was lawfully established and operating before new or amended zoning regulations prohibited it. It is generally allowed to continue but may not be expanded, and if destroyed or abandoned, the nonconforming status may be lost.

Explanation

A Comprehensive Plan (also called a Master Plan or General Plan) is a long-range policy document that guides a community's growth, land use, transportation, and development goals. It is generally advisory rather than legally binding, but zoning decisions should be consistent with it.

Explanation

Spot zoning is the rezoning of a small parcel of land in a manner inconsistent with the surrounding zoning, typically to benefit a single property owner. Courts often strike down spot zoning as arbitrary and inconsistent with a comprehensive plan.

Explanation

Inclusionary zoning is a land use tool that requires or incentivizes developers to include a percentage of affordable housing units within new residential developments. It is used by many Illinois municipalities to increase the supply of affordable housing.

Explanation

Building setback requirements specify the minimum distance that a structure must be located from property lines (front, rear, and side yards). They are established by local zoning ordinances to provide open space, light, and air between buildings.

Explanation

A Planned Unit Development (PUD) is a flexible zoning approach that allows a developer to plan a large site comprehensively, often mixing residential, commercial, and open space uses in ways that standard zoning would not permit. It offers design flexibility in exchange for community amenities.

Explanation

In Illinois, the authority (enabling power) to enact zoning ordinances is delegated to municipalities through the Illinois Municipal Code (65 ILCS 5) and to counties through the Counties Code (55 ILCS 5). Municipalities derive their zoning power from the state, not the federal government.

Explanation

A nonconforming use is one that was legally established but no longer conforms to current zoning regulations because the zoning was subsequently changed. These uses are generally allowed to continue (grandfathered) but may be restricted from expansion or rebuilding if substantially destroyed.

Explanation

A variance is a grant of relief from specific zoning requirements (such as setbacks, height limits, or lot coverage) when strict compliance would create an unnecessary hardship due to unique characteristics of the property. It does not change the zoning classification.