Grading & Drainage: Arlington Heights vs Tinley Park
How do grading & drainage rules compare between Arlington Heights, IL and Tinley Park, IL?
Arlington Heights and Tinley Park have similar restriction levels.
Arlington Heights, IL
Cook County
Arlington Heights requires grading and drainage plans for new construction and significant site modifications. All grading must maintain positive drainage away from structures and must not redirect water onto neighboring properties. A grading permit is required for earth-moving activities that alter the existing drainage patterns on residential property.
View full Arlington Heights rules →Tinley Park, IL
Cook County
Tinley Park regulates grading and drainage on residential properties to prevent water from being directed onto neighboring lots or creating flooding. Minor grade changes typically do not require a permit, but substantial grading requires a permit and must not alter established drainage patterns. Sump pump and downspout discharge must be directed to lawns or storm sewer, not onto neighbors or sanitary sewer.
View full Tinley Park rules →Key Facts Comparison
| Fact | Arlington Heights | Tinley Park |
|---|---|---|
| Grading Plan | Required for new construction | - |
| Foundation Slope | Minimum 2% for 10 feet | - |
| Retaining Wall Permit | Required if over 4 feet | - |
| Neighbor Drainage | Cannot redirect water onto adjacent lots | - |
| Engineering Contact | (847) 368-5800 | - |
| Permit | - | Large grading yes |
| Drainage Pattern | - | Preserve established |
| Sump Discharge | - | Lawn or storm sewer |
| Sanitary Sewer | - | Discharge prohibited |
| Downspouts | - | Splash to lawn |
Highlighted rows indicate differences between cities.
Arlington Heights FAQ
Do I need a grading permit for landscaping work?
A grading permit is required if your landscaping work involves fill, excavation, or changes to existing drainage patterns. Minor landscaping that does not alter grading or drainage does not typically require a permit.
Can my neighbor redirect water onto my property?
No. The Village requires that all grading maintain existing drainage patterns and not redirect water onto adjacent properties. If a neighbor's grading work is causing drainage problems on your property, contact Engineering at (847) 368-5800.
When is an engineered retaining wall required?
Retaining walls over 4 feet in height require engineering design by a licensed professional engineer and a building permit. Walls under 4 feet generally do not need engineering but must still comply with setback and drainage requirements.
Tinley Park FAQ
Can I regrade my yard in Tinley Park?
Minor leveling is typically fine without a permit. Substantial grading, retaining walls, or changes that redirect water flow require a grading permit and review to ensure neighbors are not adversely affected.
Where should my sump pump discharge?
Sump pumps must discharge to your own lawn at least 5 feet from the foundation, or to the storm sewer with Village approval. Discharge to the sanitary sewer is prohibited and should be disconnected if discovered.
My neighbor's drainage floods my yard — what can I do?
Start with a conversation. If unresolved, contact Code Enforcement at (708) 444-5100 to investigate. Persistent issues may require a civil nuisance action under Illinois reasonable use principles.
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