Lawrenceville businesses now get water from Gwinnett County, which took over the city's distribution system, but still get natural gas, electric and sanitation from the city. Gwinnett answers backflow questions, and the city's Planning and Development office houses the Building Official. Call the number on this page to be connected with a local plumber in Lawrenceville.

What happens when you call
You'll be connected with an independent local plumber who does commercial work in Lawrenceville. Downtown, that often means older storefronts and restaurants on the square; elsewhere, offices, medical suites and rental property. Be ready to describe the business, the fixtures involved and when the space can be closed. If the issue involves gas appliances, mention that too, because Lawrenceville runs its own gas system.
Tenants should check whether the lease puts repairs on them or on the owner before approving work.
What affects the cost
- One fixture versus the building's sewer lateral, which Gwinnett makes the owner's responsibility from end to end
- The age of the building; the city's median home dates to 1988, about 30% predate 1980, and the square has some of the oldest buildings in Gwinnett
- Diagnostic time with a camera or leak locator
- After-hours scheduling around events and business hours downtown
- Permit and inspection steps with the city
- Gas piping work coordinated with the city gas department
Local conditions in Lawrenceville
Gwinnett County bought the City of Lawrenceville's water distribution system, so water service and billing now come from Gwinnett's Department of Water Resources while the city still sends a bill for gas, electric and sanitation. The city kept its wells, storage tanks and treatment plants. Gwinnett maintains the main and the meter; everything on the customer's side, plus the entire sewer lateral and its connection to the county sewer, belongs to the owner. Gwinnett's 24-hour dispatch is 678.376.7000.
Backflow questions go to Gwinnett DWR at 678.376.4213 or DWRBackflow@GwinnettCounty.com. Our sources didn't verify program details such as annual testing, so confirm before planning around a schedule. Gwinnett water is soft, about 1.3 grains per gallon on average, so a softener is rarely the fix for scale complaints.
Gas is the city's. If anyone smells gas, leave the building first and call 911 or the City of Lawrenceville Natural Gas Department's after-hours and emergency line, 770-963-3332, from outside. The city directory lists the Building Official under Planning and Development at 678-407-6583; we did not verify the city's specific plumbing permit rules.
Before the plumber arrives
- Find the water main shutoff and the gas meter
- Note the affected fixtures and when the problem started
- Have the latest Gwinnett water bill handy
- Locate any backflow device and past test reports
Commercial Plumbing questions in Lawrenceville
What should employees do if they smell gas at work?
Where does the utility's part of the water line end?
How can we find out what our water service line is made of?
Which office issues the permit for commercial plumbing work?
More plumbing services in Lawrenceville
Commercial Plumbing nearby
Helpful guides
Sources
- Gwinnett County: Purchase of the Lawrenceville Water Distribution System
- City of Lawrenceville: Natural Gas Department
- City of Lawrenceville: Planning and Development Directory
- Gwinnett County Water Resources: What Property Owners Maintain
- Gwinnett County Water Resources 2025 Water Quality Report
- Gwinnett County Water Resources: Drinking Water Quality
- Lawrenceville housing by year built (ACS 2019-2023, via Point2Homes)
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