Decks in unincorporated Cook County generally require building permits. Decks not more than 30 inches above grade may be exempt. Elevated decks, attached decks, and covered patios all require permits. Non-conforming decks being repaired must be brought into compliance with current codes.
The Cook County Building Code (adopting the International Building Code) requires permits for most deck construction. Decks not more than 30 inches above adjacent grade at any point, not over a basement, and not part of the required means of egress may be exempt from building permits. All other decks require permits, including: decks attached to the house, decks over 30 inches above grade (which also require guardrails of at least 36 inches), elevated decks with stairs, and covered decks or porches. Per Cook County policy, repairing or replacing a non-conforming deck, porch, or gazebo requires bringing it into compliance with current building codes and zoning ordinance. The permit process includes plan review, a building permit fee, and inspections (footer/foundation, framing, and final). Patios at grade level (concrete slabs, pavers) do not typically require building permits unless they affect drainage or are attached structures.
Building a deck without a permit is a code violation requiring 30-day compliance. Non-conforming decks must be brought up to code. Failure to comply may result in fines and required demolition.
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Side-by-side rule comparisons with other cities in Cook County.
See how other cities in Cook County handle deck & patio permits.
See how Schaumburg's deck & patio permits rules stack up against other locations.
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