Grading & Drainage: Oak Park vs Skokie
How do grading & drainage rules compare between Oak Park, IL and Skokie, IL?
Oak Park and Skokie have similar restriction levels.
Oak Park, IL
Cook County
Oak Park requires grading and drainage plans for construction projects that alter the topography or drainage patterns of a property. Property owners must ensure that surface water drains properly and does not flow onto neighboring properties. Grading permits may be required for significant earthwork.
View full Oak Park rules →Skokie, IL
Cook County
Skokie requires that lot drainage be managed so that stormwater flows to public streets, alleys, or storm sewers and does not adversely affect neighboring properties. Grading plans are reviewed by Public Works and Community Development for new construction, additions, and major landscaping projects. Alterations that redirect water onto neighbors violate the municipal code.
View full Skokie rules →Key Facts Comparison
| Fact | Oak Park | Skokie |
|---|---|---|
| Grading Plan | Required with building permits | - |
| Drainage Rule | Cannot increase flow to neighbors | - |
| Downspouts | Must not connect to sanitary sewer | Not to sanitary sewer |
| Retaining Walls | Permit required over 4 ft | Engineered over 4 ft |
| Regional Standard | MWRD Watershed Management Ordinance | - |
| Positive Drainage | - | Away from structures |
| Neighbor Drainage | - | Cannot redirect harmfully |
| Minimum Slope | - | 2% from foundation |
Highlighted rows indicate differences between cities.
Oak Park FAQ
Do I need a grading permit in Oak Park?
A grading plan is required as part of most building permits. Significant earthwork may require a separate grading permit even without other construction. Contact the Building Division to determine if your project needs one.
Can I change the slope of my yard?
You may regrade your property, but you cannot alter drainage patterns in a way that increases stormwater flow onto neighboring properties. A grading plan showing existing and proposed drainage is typically required.
Can I connect my downspouts to the sewer?
Direct connection of downspouts to the sanitary sewer is not permitted. Downspouts should discharge onto your property's surface where water can infiltrate or be managed through approved drainage methods.
Skokie FAQ
Do I need a permit to regrade my yard?
Major grading, retaining wall construction, or projects that change drainage patterns may require a permit. Minor landscaping without altered drainage typically does not. Contact Community Development before significant projects.
My neighbor's drainage is flooding my yard. What can I do?
Report to Skokie Public Works at (847) 933-8427. The Village can investigate whether modifications violate drainage rules. Civil remedies are also available through private legal action.
Where should my sump pump discharge?
To your own property, ideally toward the street, alley, or storm inlet. It may not connect to the sanitary sewer, and the discharge cannot be concentrated onto neighboring property.
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