Erosion Control: Cary vs Raleigh
How do erosion control rules compare between Cary, NC and Raleigh, NC?
Cary and Raleigh have similar restriction levels.
Cary, NC
Wake County
Wake County is delegated by the State of NC to enforce the Sedimentation Pollution Control Act (NCGS Ch. 113A Art. 4). Wake County UDO Article 10 requires an Erosion & Sedimentation Control Plan and permit for any land-disturbing activity of 12,000 sq ft or more, or any single-family lot 20,000 sq ft or more.
View full Cary rules →Raleigh, NC
Wake County
Raleigh UDO Article 9.4 requires an approved erosion and sedimentation control plan for any land-disturbing activity of 12,000 square feet or more. Plans must comply with both the Raleigh Stormwater Design Manual and the NC Erosion and Sediment Control Planning and Design Manual. The city conducts inspections during construction and can issue stop-work orders and civil penalties for violations.
View full Raleigh rules →Key Facts Comparison
| Fact | Cary | Raleigh |
|---|---|---|
| Trigger | 12,000 sq ft disturbance | - |
| Residential trigger | 20,000 sq ft | - |
| Ground cover deadline | 7 days | - |
| Buffer | Neuse 50 ft | - |
| Max penalty | $5,000/day | - |
| Code Reference | - | UDO Article 9.4 — Erosion & Sedimentation |
| Threshold | - | 12,000 sq ft of land disturbance |
| State Authority | - | NC Sedimentation Pollution Control Act |
| Penalties | - | Civil penalties up to $5,000/day |
| Inspections | - | City conducts construction site inspections |
Highlighted rows indicate differences between cities.
Cary FAQ
Does a small residential foundation need a plan?
Only if disturbance exceeds the 12,000 sq ft (or 20,000 sq ft single-family) threshold. Most single-home foundations don't trigger but driveways + grading often do.
Who is the local contact?
Wake County Watershed Management Division — sedimentation control plan review and inspections. Call 919-856-7400.
What if the site is inside Raleigh?
Raleigh runs its own delegated program. Apply through the City of Raleigh Stormwater Department for sites inside city limits.
Raleigh FAQ
What triggers an erosion control plan in Raleigh?
Any land-disturbing activity of 12,000 square feet or more requires an approved erosion and sediment control plan before work begins. A land disturbance permit must be obtained from the city.
What standards apply to Raleigh erosion control?
Plans must meet requirements of both the Raleigh Stormwater Design Manual and the NC Erosion and Sediment Control Planning and Design Manual. Where they conflict, the more stringent standard applies.
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