Tinley Park, IL Building Setbacks & Zoning: Setback Rules (2026)

07(B)(14), sets the setback rules for decks, porches, gazebos, trellises, pergolas and other accessory structures in Tinley Park. Every one of these structures needs its own building permit, and every one must sit at least 5 feet from all property lines and stay clear of any utility easement. Open-air front porches carry an additional limit on top of the general setback: a porch cannot project into the required front yard by more than 35% of the minimum yard setback, not counting its stairways, and in residential districts no porch or portico may extend more than 15 feet out from the exterior wall of the house.

Regardless of that allowance, no porch or portico may ever come within 5 feet of a property line. The same section adds construction standards that ride along with the setback: concrete load-bearing piers must be at least 8 inches in diameter and sunk 42 inches below grade, guards are required once a platform rises more than 24 inches above grade (36 inches tall on residential lots, 42 inches on commercial ones), and any stairway with four or more risers needs handrails set between 32 and 38 inches above the tread.

This setback rule sits beside the separate 5-foot placement rule for detached storage and utility sheds in Section R329, which likewise keeps sheds 5 feet from side and rear lot lines, and both defer to the village's Zoning Ordinance for the underlying yard setbacks that apply to the principal structure itself.