Alpharetta, Georgia · Atlanta metro
Yard Drainage Solutions in Alpharetta, GA
From Windward to downtown Alpharetta, drainage complaints here usually trace back to graded subdivision lots, compacted clay and roof water with nowhere to go.
Alpharetta sits in North Fulton on rolling ground drained largely by Big Creek and its tributaries on the way to the Chattahoochee. Much of the residential development happened in phases from the 1980s onward, which means most yards sit on ground that was cut, filled and compacted by machine rather than on undisturbed soil.
That history shows up in the drainage problems homeowners describe: a back corner that stays soft for days, a side yard between houses that never dries, and water tracking down from a neighbor's lot along a property line where two graded pads meet.
Terrain and soil around Alpharetta
Elevations roll gently through most of the city, with steeper drops as lots approach creek corridors and detention areas at the edges of subdivisions. Even a modest slope concentrates a lot of water when it collects from several roofs and driveways upstream.
Below a shallow topsoil layer, the subsoil is typically dense red clay. It holds water and accepts it slowly, so a low spot that fills during a storm can still be saturated two days later. On construction-compacted lots that effect is stronger, because heavy equipment during the build reduced whatever porosity existed.
Drainage problems we hear about most in Alpharetta
Standing water in graded back yards
Rear yards on Windward-era and later subdivision lots are often the low half of the pad. Water arrives from the house roof, the patio and the uphill neighbor, then stops at a flat area with no outlet.
Narrow side yards that stay wet
The strip between houses collects roof discharge from two structures and gets very little sun. Buried downspout lines and a small basin in that corridor are a common fix.
Property-line runoff between lots
Where two graded pads meet, the low seam becomes an informal channel. A shaped swale or an interceptor line can carry that flow instead of letting it soak the lawn.
French drains that stopped working
Older installations built without washed stone or adequate filter fabric silt up in North Fulton clay. Symptoms are ponding directly over the trench line and a dry outlet during rain.
Nearby areas
Requests also come in from the communities that surround Alpharetta along GA-400 and Old Milton Parkway:
- Milton
- Johns Creek
- Roswell
- Crabapple
- Ocee
- Halcyon area
- Windward
Not sure whether your address is covered? Submit your ZIP code through the drainage estimate form and it will be matched against professionals serving that part of the metro.
Drainage problem in Alpharetta?
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Questions
Alpharetta Drainage FAQs
Why does my Alpharetta back yard stay wet for days after rain?
Usually a combination of compacted clay subsoil from original construction and a low area with no outlet. Water fills the pocket, the clay releases it slowly, and evaporation does the rest — which takes days in humid weather.
My neighbor's yard drains onto mine. What can be done?
On a graded subdivision lot the practical response is usually to manage the flow once it arrives: shape a swale along the low seam or install an interceptor line and carry the water to a lower discharge point on your property.
Do Alpharetta subdivisions have restrictions on drainage work?
Some HOAs review visible changes such as regrading, hardscape or a new outlet near a common area, and city requirements can apply near stream buffers and detention facilities. Worth confirming for your specific lot before work begins.