Inside the City of Stone Mountain, DeKalb County Watershed Management handles water and sewer, including backflow rules for commercial customers, while the city's Building Permits Department issues plumbing permits through a contracted permit service. Stone Mountain-mailing addresses outside the city are not covered by the city permit office. Call the number on this page to be connected with a local plumber in Stone Mountain.

What happens when you call
You'll be connected with an independent local plumber who handles commercial work in Stone Mountain. Say whether the business is in the historic village on Main Street or out in the larger Stone Mountain mailing area, since that decides which permit office applies. Describe the fixtures involved and the hours the space can be closed. Shops and restaurants near the park tend to be busiest on weekends, so weekday mornings are often the easiest time for drain or heater work.
What affects the cost
- The age of the building; about 65% of city housing was built from 1960 to 1989, and the village core is older still
- Whether a blockage is in a fixture branch or the building sewer
- Camera or leak-locating time
- Off-hours work to stay open for visitors
- City permit steps, processed by Permit Service Group with inspections by SAFEbuilt
- Backflow assembly repairs if a test fails
Local conditions in Stone Mountain
The City of Stone Mountain's Public Works does not handle water or sewer. DeKalb County Watershed Management does, and the city sends water and sewer emergencies or questions to DeKalb at 770-270-6243. DeKalb is responsible for the service line through the meter, and the owner from the meter to the building.
DeKalb's Backflow Prevention Section requires commercial and multi-family customers to install an assembly on the customer side of the meter, a reduced pressure type for high hazards and a double check for low hazards, and to test it annually with a certified tester (GAWP/GBPAT, ASSE, ABPA or UF TREEO). Restaurants, salons and anything with irrigation are typical. The section answers at 404-687-4075.
The city requires separate trade permits, posts a plumbing permit application, and asks owners to contact City Hall on Main Street, 770-498-8984, before any construction. The Stone Mountain mailing ZIPs cover large unincorporated areas beyond the city, and those addresses aren't covered by the city's permit office.
Before the plumber arrives
- Confirm whether the property is inside city limits
- Clear a path to the main shutoff and water heater
- Find the outdoor cleanout if there is one
- Locate the backflow assembly and the last test report
- Note when the problem started and what's affected
Commercial Plumbing questions in Stone Mountain
Our address uses this town name, but we may be outside city limits. Does that matter?
Which office issues the permit for commercial plumbing work?
Does a business here need a backflow prevention assembly?
What should employees do if they smell gas at work?
More plumbing services in Stone Mountain
Commercial Plumbing nearby
Helpful guides
Sources
- City of Stone Mountain: Utilities
- City of Stone Mountain: Public Works
- City of Stone Mountain: Building Department
- DeKalb County Watershed Management: Backflow Prevention Brochure
- DeKalb County Watershed Management: Service Line Ownership
- Atlanta Gas Light: Contact Us
- Stone Mountain housing by year built (ACS 2019-2023, via Point2Homes)
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