Unincorporated Cobb County
Retaining walls and drainage in East Cobb, GA
New retaining walls, timber wall replacement and yard drainage for East Cobb homes. Many walls here were built with the subdivisions decades ago and are wearing out. Get a free written quote from a local crew.
East Cobb
Older timber walls on wooded, sloped lots
East Cobb neighborhoods are mostly established subdivisions with mature trees and sloped backyards. Many backyard and driveway walls were built from treated timber, which often lasts only 15 to 25 years in wet clay. Tree roots, shade and slow-drying soil add to the wear.
Timber wall replacement
Removing rotted timber walls and rebuilding in block with a real gravel base and drainage.
Backyard terracing
Turning a steep yard into usable flat levels with low block or stone walls.
Drainage behind existing walls
Adding or clearing drain pipe and gravel so an older wall stops pushing forward.
Typical prices
What walls and drainage cost in East Cobb
Typical installed ranges from published 2026 cost guides, not quotes.
- Block retaining wallPer sq ft of wall face$30 to $90
- Natural stone wallPer sq ft of wall face$45 to $110
- Retaining wall repairTypical project$450 to $950
- French drainPer linear foot$20 to $50
- Underground downspoutOne extension$800 to $2,000
Sources: LawnStarter retaining wall cost guide (2026); Angi retaining wall repair cost (2026); Angi yard drainage cost (2026); Angi underground gutter drainage cost (2026).
Permits
Permit rules in East Cobb
East Cobb is not a city, so addresses here generally fall under unincorporated Cobb County rules: walls over 4 feet, or walls holding up a driveway, building or slope, generally need a building permit and plans stamped by a Georgia professional engineer. Many East Cobb subdivisions also have HOA architectural review. Source: Cobb County residential permitting.
ZIP codes we take requests from: 30062, 30066, 30067, 30068. See retaining wall types, wall repair and drainage.
FAQ
Questions from East Cobb homeowners
Do I need a permit for a retaining wall in East Cobb?
East Cobb addresses generally follow unincorporated Cobb County rules. Walls over 4 feet, or walls holding up a driveway, building or slope, generally need a permit and engineered plans. Your HOA may also need to approve the wall.
How much does it cost to replace a timber retaining wall in East Cobb?
It depends on length, height and access. As a guide, block walls typically run about $30 to $90 per square foot of wall face installed, plus removal of the old timbers. Angi's 2026 data puts full rebuilds at about $6,000 to $14,500.
Why do so many East Cobb timber walls fail?
Treated timber often lasts 15 to 25 years in wet clay, and many East Cobb walls are older than that. Rot usually starts at the bottom course and at the tiebacks buried in the slope.
Get a free quote in East Cobb
Tell us what the yard is doing. A local crew follows up to look at the site and gives you a written price. No cost, no obligation.