Deck & Patio Permits: Des Plaines vs Tinley Park
How do deck & patio permits rules compare between Des Plaines, IL and Tinley Park, IL?
Des Plaines and Tinley Park have similar restriction levels.
Des Plaines, IL
Cook County
Decks attached to a home in Des Plaines require a building permit regardless of size. Patios at grade may be permit-exempt below a threshold but still must comply with zoning, lot coverage, and floodplain rules.
View full Des Plaines rules →Tinley Park, IL
Cook County
Decks in Tinley Park require a Village building permit. At-grade patios typically do not require a permit but must comply with lot coverage and zoning rules. All exterior improvements must meet setbacks.
View full Tinley Park rules →Key Facts Comparison
| Fact | Des Plaines | Tinley Park |
|---|---|---|
| Deck Permit | Required | Required |
| Patio Permit | Often exempt under 200 sq ft | - |
| Footing Depth | 42 inch frost line | - |
| Guard Height | 36-42 inches | - |
| Floodplain | Additional rules apply | - |
| At-Grade Patio | - | Typically no permit |
| Frost Depth | - | 42 inches |
| Guardrail Trigger | - | 30 in height |
Highlighted rows indicate differences between cities.
Des Plaines FAQ
Do I need a permit for my Des Plaines deck?
Yes. Attached decks require a building permit regardless of size. Submit plot plan and construction details to Community Development.
What about a paver patio?
At-grade patios under a threshold (commonly 200 sq ft) may be permit-exempt but still count toward lot coverage limits. Verify with Community Development.
What if my deck is in the Des Plaines River floodplain?
Additional floodplain elevation and permit requirements apply. Contact the city's floodplain administrator before designing or applying.
Tinley Park FAQ
Do I need a permit for a ground-level deck?
Yes — structural decks require a permit regardless of height. At-grade patios on pavers generally do not, but lot-coverage rules still apply.
How deep do footings need to be?
42 inches below grade to meet Illinois frost depth. Sonotube or helical piers are commonly specified.
Do I need permission from my HOA?
Most Tinley Park HOAs require ARC approval for decks. Get HOA sign-off and the Village permit before starting.
Compare other topics
See how Des Plaines and Tinley Park compare on other ordinance categories.
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