Grading & Drainage: Chicago vs Evanston
How do grading & drainage rules compare between Chicago, IL and Evanston, IL?
Evanston has fewer restrictions than Chicago.
Chicago, IL
Cook County
Chicago regulates grading and drainage through the Stormwater Management Ordinance (MCC 11-18) and the Building Code. New development must direct drainage away from structures and manage stormwater on-site without adversely affecting neighboring properties.
View full Chicago rules →Evanston, IL
Cook County
Evanston requires permits for grading and drainage work that alters the natural flow of water on a property. Fill, excavation, and regrading must not direct stormwater onto neighboring properties. A grading plan prepared by a licensed engineer is required for projects exceeding specified thresholds.
View full Evanston rules →Key Facts Comparison
| Fact | Chicago | Evanston |
|---|---|---|
| Code Section | MCC 11-18, Chicago Building Code | - |
| Standard | Positive drainage away from structures | - |
| Neighbor Impact | Must not increase runoff to adjacent properties | - |
| Sewer System | Combined sewer - on-site retention encouraged | - |
| Authority | Dept. of Water Management | - |
| Permit Threshold | - | 50+ cubic yards of earthwork |
| Engineer Required | - | Licensed PE for grading plans |
| Drainage Rule | - | Must not redirect onto neighbors |
| Bluff Areas | - | Additional review near lakefront |
| Community Dev | - | (847) 448-4311 |
Highlighted rows indicate differences between cities.
Chicago FAQ
Can I change the grading of my property in Chicago?
Regrading that affects drainage must ensure stormwater does not flow onto neighboring properties. Significant changes may require review by the Department of Water Management under MCC 11-18.
Can I connect downspouts directly to the sewer in Chicago?
Chicago discourages direct downspout connections to the combined sewer system. Disconnecting downspouts and directing water to rain gardens or rain barrels is encouraged as a stormwater BMP.
Evanston FAQ
When do I need a grading permit in Evanston?
A grading permit is required for projects involving more than 50 cubic yards of fill or excavation, or any work within 25 feet of a property line that could alter drainage to adjacent properties. Contact Community Development at (847) 448-4311.
Can I regrade my yard to fix drainage problems?
Yes, but you must not redirect stormwater onto neighboring properties. A grading plan from a licensed engineer may be required. The work must maintain positive drainage away from building foundations.
Are there special grading rules near the lakefront?
Yes. Grading near Lake Michigan bluffs requires additional review due to erosion and slope stability concerns. Contact Community Development for specific requirements for lakefront properties.
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