Faster Septic Permits in NC: The Engineered Option and AOWE Routes

Sourced from N.C. General Statutes 130A-336.1 and 130A-336.2, 15A NCAC 18E .0207 (), and G.S. 90A Article 5 — last checked August 2026.

The Problem These Solve

North Carolina’s standard process runs through your county Local Health Department. An authorized agent evaluates your soil and site, issues the Improvement Permit, then the Construction Authorization.

That works well when the county has capacity. When it doesn’t — and in fast-growing counties it frequently doesn’t — you wait. For someone working to a construction schedule or a closing date, that wait is the whole problem.

The alternative routes exist precisely for that situation. Rather than waiting for a county employee, you hire a qualified licensed professional to do the evaluation and design.

The Engineered Option Permit

Under G.S. 130A-336.1, a licensed professional engineer, licensed soil scientist, or licensed geologist — acting within their respective scope of work — can design and certify a wastewater system.

The professional prepares plans and specifications. Upon completion, the PE or authorized designer provides a written statement to the owner confirming that construction is complete and in accordance with the approved plans, specifications and any modifications.

The AOWE Route

Under G.S. 130A-336.2, an Authorized On-Site Wastewater Evaluator can perform the evaluation and permitting function. An AOWE is a person licensed in accordance with G.S. 90A Article 5 who meets the certification requirements in G.S. 130A-336.2(a) and 21 NCAC 39.

Functionally similar to the EOP, but through a different professional credential.

How It Works Under the Current Rules

15A NCAC 18E .0207, sets out the alternative wastewater system permitting options. The owner of a wastewater system may obtain an IP or a CA from the Local Health Department, or a Notice of Intent from a PE or AOWE, as applicable.

The Notice of Intent is the mechanism. Rather than the county issuing your permits, your licensed professional files the NOI and takes on the certification responsibility.

Is It Worth It?

Honestly, it depends on one variable: how backed up your county is.

You are trading money for time. The professional fees for an engineered design are real and meaningful, and on a straightforward site in a county with capacity, the standard route is cheaper and works fine.

Where it makes sense is when the delay itself is costing you — a construction loan accruing interest, a closing date, a builder’s schedule. In fast-growing counties where the health department queue runs long, the math can flip quickly.

The question to ask first: call your county Local Health Department and ask what the current wait is for a site evaluation. If the answer is two weeks, take the standard route. If it is three months, the alternatives are worth pricing.

A Note on Complex Sites

These routes are also used on genuinely difficult sites, where an engineered design is going to be needed regardless. If your property has steep slope, shallow bedrock, or a high water table, you may end up working with a licensed professional either way — in which case the alternative permitting route may add little cost while removing the county evaluation step.