Septic System Permits: What You Need and When

Septic permits protect public health and your groundwater. Here's when they're required and how to navigate the process.

When Permits Are Required

• New septic system installation
• Replacement of tank or drain field
• Significant modification or expansion of an existing system
• Adding bedrooms to a home (typically triggers septic re-evaluation)
• Connecting to an existing system from a new structure
• Repair of certain system components, depending on jurisdiction

When Permits Are Typically Not Required

• Routine pump-outs (pumping and cleaning, no modification)
• Replacing a pump in an existing system (varies by jurisdiction)
• Minor lid repairs
• Adding a riser to an existing access lid (check locally)

How to Get a Septic Permit

1. Contact your county health department or environmental health office
2. Request the septic permit application package
3. Commission a soil evaluation and perc test if required
4. Have a system design prepared by a licensed professional
5. Submit design and application with required fees
6. Wait for review and approval (2–6 weeks typical)
7. Schedule inspections at required construction stages

What Happens Without a Permit

• Fines from the county (often $500–$5,000 per violation)
• Required removal of the unpermitted system at your expense
• Difficulty selling the property — unpermitted systems must often be disclosed or corrected
• No protection if the system fails and causes neighbor or environmental damage

Permit Fees

Permit fees vary dramatically by county — from $100 to $2,000+ for a full installation permit. Contact your county health department for current fee schedules.

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