Arlington Heights vs Oak Lawn
How do grading & drainage rules compare between Arlington Heights, IL and Oak Lawn, IL?
Arlington Heights and Oak Lawn 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 →Oak Lawn, IL
Cook County
Oak Lawn requires new construction and significant improvements to maintain positive drainage away from structures without adversely affecting neighboring properties. Grading plans are reviewed at building permit. Surface water may not be discharged directly onto adjacent properties.
View full Oak Lawn rules →Key Facts Comparison
| Fact | Arlington Heights | Oak Lawn |
|---|---|---|
| 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 | - |
| Slope from Foundation | - | 2% minimum |
| Extension | - | 10 feet from foundation |
| Downspout to Sewer | - | Prohibited |
| Sump to Yard | - | Not to sanitary |
| Final Inspection | - | Required pre-CO |
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.
Oak Lawn FAQ
Can water from my yard drain to my neighbor's?
Not as a result of your grading changes. Oak Lawn's rules prevent creating new or increased drainage onto neighboring properties. Preserve or re-establish historic drainage patterns.
Where should my downspouts discharge?
Discharge away from foundations to the yard where water can infiltrate or flow to the street. Do not connect downspouts to the sanitary sewer.
Do I need a grading plan for an addition?
Yes for significant additions or new construction. A grading plan by a licensed surveyor or engineer is reviewed at building permit.
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