What Does Septic-to-Sewer Conversion Cost in Gwinnett County?

Alcovy Septic answers the septic to sewer conversion cost gwinnett question the way the county actually bills it: one fixed charge you pay at a counter, one small permit, and one large private construction cost that has nothing to do with the county at all. Most people quote only the first number and get a shock at the third.

What the county charges

Gwinnett’s residential septic-to-sewer procedure sets a fixed price for a standard home on a 3/4-inch meter:

You pay the county charge at the DWR Central Facility records counter, 684 Winder Highway, Lawrenceville, GA 30045. The plumbing-only permit is issued separately by the Building Permits Division at 446 West Crogan Street, Suite 125, Lawrenceville. Inside the city limits of Snellville, the city’s own procedure applies: same county charge, but your plumber pulls a $60 city plumbing permit and the city issues a certificate of completion when the work passes. If you are in Snellville, start there.

The part that actually costs money

The county charge is the small half. The private work — trenching from the house to the sewer main or cleanout, new lateral, connection, restoration of the yard and driveway — is bid by a licensed plumber and is where the real number lives. Where homeowners report it, that private connection work commonly runs $14,000 or more, and it swings hard with distance to the main, depth, rock, driveways and mature trees.

Two costs sit alongside it:

• Pumping the old tank. A licensed pumper must empty it first — about $280 to $520 for a typical 1,000-gallon tank, per the ranges in the Lawrenceville pumping cost guide.
• Crushing or filling. The empty tank is crushed, or filled with concrete or gravel. That is the work on our tank abandonment page.

Realistic all-in for a typical Gwinnett house: $18,000 to $25,000+, of which only $4,172 goes to the county.

Do you have to connect?

Georgia’s on-site sewage rules (Rule 511-3-1-.03) make connection mandatory when public sewer is available within 200 feet of the property line. A failing system with sewer available has to be connected rather than repaired — you do not get to rebuild a drain field instead.

That rule is what turns this into an either/or decision. If your field has failed and sewer is 150 feet away, the drain field replacement cost guide is academic: the county will point you at the sewer. If sewer is 400 feet away, a new field in Piedmont clay at $8,000 to $20,000+ may still be the cheaper path. With roughly 30 percent of Gwinnett on septic (Gwinnett County), plenty of houses are in both situations.

The two inspections

The procedure requires two separate inspections, and skipping either leaves the job unfinished on paper:

1. The sewer connection — inspected at the cleanout before the trench is backfilled.
2. The old tank — inspected after it has been pumped and crushed or filled.

Schedule them in that order, and keep the pumper’s dated receipt with gallons removed. It is the document that proves the tank was emptied by a licensed hauler, and it is the same receipt that qualifies for the county’s stormwater fee credit if you are still on septic when you apply.

Before you decide

Pull your septic record first. Gwinnett’s Environmental Health office maintains records back to 1959 and the plats are free online — the septic records guide shows the lookup, and the plat tells you where the tank and field are before anyone trenches through them. If the system is simply overdue rather than failing, a pump-out and an inspection may buy you years; use the system assessment to sort symptoms from age. If you are repairing rather than converting, the Gwinnett repair permit guide covers the Level 3 soil report you will need.

Questions about county fees go to the DWR permits desk at 678-376-6887; septic questions go to Environmental Health at 770-963-5132.

Bottom line

Gwinnett’s own charge for a residential septic-to-sewer conversion is $4,172 on a 3/4-inch meter, plus a plumbing permit of 0.6% of the estimate ($30 minimum), or $60 flat inside Snellville. The plumber’s trench and connection work commonly runs $14,000 or more, and the old tank must be pumped and then crushed or filled with two inspections. Plan on $18,000 to $25,000 all in, and check the 200-foot rule before you spend anything on a new drain field. To get the tank pumped and abandoned properly, reach us through the contact page.