Grading & Drainage: Duluth vs Lawrenceville
How do grading & drainage rules compare between Duluth, GA and Lawrenceville, GA?
Duluth and Lawrenceville have similar restriction levels.
Duluth, GA
Gwinnett County
Grading permits required for significant earthwork. Drainage must not be redirected onto adjacent properties. Duluth enforces Gwinnett County Stormwater Management standards.
View full Duluth rules →Lawrenceville, GA
Gwinnett County
Grading and drainage reviewed through Lawrenceville Planning & Development. Disturbances over 5,000 sq ft require a grading plan; changes to drainage cannot increase runoff to neighbors.
View full Lawrenceville rules →Key Facts Comparison
| Fact | Duluth | Lawrenceville |
|---|---|---|
| Permit | Tied to building/land disturbance permit | - |
| Retaining Wall | Engineered if over 4 ft | - |
| Slope | 6 in/10 ft from structures | 6 in/10 ft from foundation |
| Discharge | Cannot redirect onto neighbors | - |
| Plan Trigger | - | 5,000 sq ft |
| Runoff Standard | - | No net increase |
| Detention | - | Commercial required |
Highlighted rows indicate differences between cities.
Duluth FAQ
Can my neighbor regrade their yard so water flows onto mine?
No. Altering drainage to damage adjacent property creates civil liability and can trigger city enforcement. Document with photos and contact Planning & Development.
Do I need engineered plans for a retaining wall in Duluth?
Yes if the wall is over 4 feet tall or carries a surcharge (driveway, pool, or structure above). Engineering is required at any height with surcharge.
How far should finished grade slope away from my Duluth home?
Six inches of fall in the first 10 feet from the foundation. This is required to prevent water intrusion and erosion.
Lawrenceville FAQ
Can my neighbor change their yard grading and drain onto my lot?
No. Lawrenceville prohibits altering drainage to send additional runoff onto adjacent property. Report concerns to Planning & Development.
When do I need a grading plan in Lawrenceville?
Any land disturbance over 5,000 sq ft triggers a grading plan requirement through Planning & Development.
How should my yard slope away from my house?
Per IRC, maintain at least 6 inches of positive drainage in the first 10 feet away from your foundation.
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