Commercial Plumbing in Lithonia, GA

Which permit office covers a Lithonia business?

It depends on where the building sits. The City of Lithonia is a small historic granite-quarrying town around Main Street, but the Lithonia mailing area is much larger and overlaps Stonecrest and unincorporated DeKalb. Inside city limits, the Building and Permitting Division at 6920 Main Street handles building and trade permits, and it lists plumbing as its own permit type alongside building, electrical and mechanical. Applications go through the city's Citizen Portal, and the office is at 770-482-8136. Addresses outside the city go to the City of Stonecrest or DeKalb County instead.

What backflow protection does DeKalb require?

DeKalb County Watershed Management's Backflow Prevention Section covers every customer. Commercial and multi-family properties need an assembly matched to their hazard level, installed on the customer side of the meter by a plumbing contractor holding a Georgia license and tested every year by a GBPAT-certified tester. The GAWP keeps the tester list, and the section's phone is 404-687-4075. Restaurants, auto shops, churches and anything with irrigation are the usual candidates.

What should we do about a main break or old service line?

Water main breaks in Lithonia are DeKalb's to fix; its 24-hour emergency repair line is 770-270-6243. DeKalb is responsible for the line through the meter, and the owner from the meter to the building. DeKalb's service line inventory lets customers check their line's material, and its 2026 report advises extra flushing for buildings with lead or galvanized service lines. In older Main Street buildings, it's worth having a plumber confirm what runs from the meter into the building.

A local note

Lithonia's Main Street commercial core is ringed by older residential streets, and buildings in the Lithonia Historic District date back more than a century. Behind those granite and brick walls, expect a mix of pipe materials from several eras. When a plumber opens a wall for one repair, ask what else looks due, since a second visit to the same wall usually costs more than doing it at once. Businesses in newer centers near I-20 are more likely to have modern plastic drains and newer heaters. Either way, tell the plumber your hours; many will work before opening or after closing so a shop or restaurant can stay open.