Water Damage in Johns Creek, GA: Creeks, Floodplain, Fulton Water

Rain is where Johns Creek trouble starts: GEMA says flash floods can peak within minutes, and the city says about 6 percent of its ground lies in a regulated floodplain. If a basement took the water, read about flooded basements and crawl spaces. Call (678) 679-2562 with the street address and how deep it got.

Call (678) 679-2562

Brick houses with black shutters on a tree-lined street in Roswell, Georgia

Rain, wind and cold

GEMA says a flood watch means flooding is possible and can still develop 6 to 12 hours after the heavy rain has stopped, and that flash floods often arrive with little warning. Johns Creek names the Chattahoochee River and Autrey Mill, Big, Cauley and Johns creeks in the Upper Chattahoochee watershed as possible sources. Maps and averages do not replace a look at your own lot.

Tips for this town

Johns Creek's public works FAQ names Fulton County Water Resources for both water and sewer. Water problems: 770-640-3040. Sewer problems: 404-612-3061, and press 1 for emergencies after hours.
The floodplain page mentions a lookup tool for a single property but gives no web address for it. It names the Community Development Department as the office to talk to before altering floodplain property.
Homeowners policies usually leave flood damage out, Johns Creek's floodplain page notes, and buildings in a Special Flood Hazard Area need flood insurance. Read yours before the water arrives.
Johns Creek's median house was built in 1995 (margin of error 1), and 5,680 of 28,948 occupied homes, about 19.6 percent, are rented (margin of error 611).
When water has stood in a basement or crawl space overnight or longer, call (678) 679-2562.
Call (678) 679-2562

What to ask in this town

Questions a Johns Creek owner can bring to the call

Four of five occupied homes here are owner-occupied, 23,268 of 28,948 (margin of error 1,000), so decisions about repairs mostly sit with the person who lives there. With a median build year of 1995, useful details are which plumbing and appliances are original and whether the lowest level was finished after the house went up.

If the lot sits in the floodplain, the city asks for a conversation with Community Development before property there is altered.

Where the water comes from and goes

A river, four creeks and Fulton's pipes

Johns Creek lies in the Upper Chattahoochee watershed. Its flood page names the river and Autrey Mill, Big, Cauley and Johns creeks, and says about six percent of the city is in a regulated floodplain, also called a Special Flood Hazard Area.

On a lot, UGA Extension asks for gutters and downspouts that are intact and carry water 6 to 10 feet from the foundation, over ground that slopes about 6 inches across that distance. For a crawl space it asks for plastic of 6 to 8 mil over the soil.

Pages behind these facts

Checked 1 Nov 2026