Tinley Park, IL Building Setbacks & Zoning: Structure Height Limits (2026)

07(B)(5), sets specific construction standards for one-story frame detached garages in Tinley Park. The maximum footprint is 720 square feet, and where the garage has a pitched roof, the total height cannot exceed 18 feet measured from the finished floor to the roof peak. The same subsection requires the garage to follow one-story dwelling construction standards from the International Residential Code, with village-specific exceptions covering grade-beam foundations, minimum stud spacing of 24 inches on center with solid mid-height blocking, wall sheathing thickness, rafter design for 30 psf snow loading, and a ban on gas-fired appliances unless AGA-approved and vented with a sealed combustion chamber.

A separate provision in the same chapter sends applicants to the Tinley Park Zoning Ordinance for the required setback and separation distance from the primary structure, and if a detached garage sits less than 10 feet from the house it needs a minimum half-inch gypsum board (or equivalent) on the interior for fire separation. One-story solid masonry or masonry-veneer detached garages follow the same one-story dwelling standards but with their own footing and foundation specifications: a spread footing at least 10 inches deep and 20 inches wide, bottom of footing at least 3 feet 6 inches below finished grade, and foundation walls at least 8 inches thick.

None of this touches the height allowed for the house itself or other principal structures, which the Building Code leaves to the village's separate Zoning Ordinance.