Union County Septic Permits: Fees, Process, and Contacts

Sourced from Union County’s published Environmental Health fee schedule, the county’s On-site Wastewater Disposal pages, and 15A NCAC 18E — last checked August 2026.

What Union County Charges

Union County publishes a full Environmental Health fee schedule, which is more than most North Carolina counties do. These are the on-site wastewater lines.

Union does not publish an effective date beside these amounts. They are current as we checked them in August 2026. Confirm before you write a check — a fee schedule with no date on it is the kind that changes quietly.

The Number That Actually Decides Your Bill

Almost every guide to septic permits quotes one figure per county. In Union that is close to meaningless, because the improvement permit is only the first half and the second half moves by a factor of six.

The cheapest construction authorization Union publishes is the Type II c at $200, so a straightforward system runs about $600 in county fees. A Type VI runs $1,600. Nothing you decide affects which row you land in — the soil evaluation does, and it happens before the construction authorization is ever priced.

Two practical consequences. First, ask for your system type in writing the moment the evaluation comes back, because that single letter and number is worth up to $1,000 in county fees and vastly more in installed cost. Second, if a contractor quotes you “permits” as one lump before the evaluation is done, they are guessing.

Union Against the Rest of North Carolina

North Carolina writes its septic rules once, statewide, in 15A NCAC 18E, and lets all 100 counties price them. There are really only three billing models in use, and Union sits at the far end of the third.

This is the finding worth carrying away. On a good lot, Union is mid-table and Wake is the expensive one. On a bad lot, that reverses completely: a Type VI costs $800 in Wake and $1,600 in Union. Wake charges one flat fee no matter what it approves; Union charges by what it approves. Which model your county uses only matters if your soil is bad — and that is exactly when it matters most.

If you are shopping land across the county line, that is the question to ask before you shop price: not what the permit costs, but whether the permit cost moves with the system type.

Full pages on the neighbors: Durham County, Wake County and Pitt County.

The Private Option, and the $35 Door

Union runs the same alternative route Pitt does, and prices it almost identically.

• Notice of Intent to Construct filing — $35. This is the engineered route, where a licensed professional designs the system and files notice rather than the county evaluating it.
• Improvement permit under the private option — 100% of the standard fee, so no saving there.
• Construction authorization under the private option — 40% of the standard fee.

That last line is the one worth reading twice. On a Type VI, the private option cuts the construction authorization from $1,200 to $480 — a $720 reduction in county fees, on precisely the systems where the county fee is worst. On a Type II c it saves $120 and is not worth the paperwork.

This is not free money. You are paying a licensed engineer or an Authorized On-site Wastewater Evaluator instead of the county, and that professional fee is larger than what you save. The reason to use the route is control and timing on a difficult site, not price. But if your soil has already pushed you into Type V or VI territory, you were likely hiring an engineer anyway — and in that case the fee reduction is real money you would otherwise leave on the table. Our page on the engineered option and AOWE routes explains how they work.

How Long It Takes

Union publishes something almost no North Carolina county does: a current turnaround figure. As of 17 August it put the average response time for soil and site evaluations on new systems at less than three weeks, and said plainly that wait times move with wet weather and application volume.

Treat that as a live number rather than a promise — it is published precisely because it changes. But a county willing to post its own queue length is a county worth calling for a current figure, and three weeks is a genuinely useful planning input if you are trying to time a land purchase or a build.

Union Does Not Inspect Septic Systems for a Home Sale

Union performs existing system inspections on request, at $125, but these are aimed at owners planning new construction — an addition, a garage, anything that might sit on or near the system — not at real estate transactions.

That matches every other North Carolina county we have checked. Wake states outright that it does not provide the service. Durham and Mecklenburg both publish a scope of work that excludes it. There is no statewide point-of-sale septic inspection mandate in North Carolina, and the county health department is not the body that would perform one. If you are buying, you hire a certified septic inspector privately — see what an NC septic inspection covers.

For records, Union takes an Existing Septic and Well Permit Records Request form. Pull the record first and hire the inspector second: knowing what was permitted tells the inspector what to look for, and doing it the other way round means paying someone to find a tank you could have located from paperwork.

Repairs, and a Warning About Assuming

Union charges $100 for a repair permit and $100 for a component replacement permit — the latter being what you need when a pump or a specific component fails rather than the field itself.

Do not carry that figure across the county line in either direction. Repair permit pricing is the least consistent line in North Carolina. Union charges $100. Caldwell County charges nothing at all for a single-family repair where the system meets the definition of a failing system, and Onslow County states there is no fee for the service at this time. Pitt publishes no repair line whatsoever. Four counties, three different answers, one statewide rulebook.

The practical instruction is short: if your system has failed, ask your own county what the repair permit costs before you assume either the best or the worst. A phone call is cheaper than either mistake.

Who to Call

Union County Environmental Health, On-site Water Protection Program

• 500 North Main Street, Monroe, NC 28112
• Phone 704-283-3553

Permits are issued by email or picked up at the Environmental Health office. The process runs in four steps: apply for the soil and site evaluation, have the site evaluated and the approved area flagged, supply any further information the specialist asks for, then receive the improvement permit and construction authorization.

Union also permits private wells, which matters because a Union lot on septic is usually on a well too: a well permit is $500, a redesign $125, a repair permit or down-hole camera assessment $100, and a bacterial water sample $70. Budget the well and the septic together — on a raw lot in Union that is $1,100 in county fees before anyone digs, and more if the soil is difficult.

If cost is the obstacle rather than paperwork, read what help is available in North Carolina first. There is a statewide program that names failing septic systems explicitly, and most people have never heard of it.