City of Kennesaw and nearby
Retaining walls and drainage in Kennesaw, GA
Block and stone retaining walls, wall repair and yard drainage for Kennesaw homes, from older streets near downtown to newer subdivisions. Get a free written quote from a local crew.
Kennesaw
Slopes, runoff and graded subdivision lots
Kennesaw has a lot of sloped ground around Kennesaw Mountain and many newer subdivisions where backyards were graded and built up during construction. When the original grading or swales stop working, water ends up against walls, fences and foundations.
Backyard leveling walls
Block walls that turn a sloped backyard into a flat, usable space.
Washout and erosion fixes
Walls and drainage below slopes where red clay keeps washing across patios and driveways.
French drains and swales
Moving water around the house when the original grading no longer works.
Typical prices
What walls and drainage cost in Kennesaw
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 Kennesaw
Addresses inside Kennesaw city limits follow City of Kennesaw rules, which can differ from the county. Addresses outside the city 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. Which one applies is checked for your address before work starts. Source: Cobb County residential permitting.
ZIP codes we take requests from: 30144, 30152. See retaining wall types, wall repair and drainage.
FAQ
Questions from Kennesaw homeowners
Do I need a permit for a retaining wall in Kennesaw?
Inside city limits, the City of Kennesaw sets the rules. Outside the city, Cobb County generally requires a permit and engineered plans for walls over 4 feet or walls holding up a driveway, building or slope.
How much does a French drain cost in Kennesaw?
Angi's 2026 data puts French drains at about $20 to $50 per linear foot installed, with most projects between $2,000 and $7,000.
Why does my Kennesaw backyard stay soggy?
Red clay drains slowly, and many lots were graded during construction. If a swale has filled in or the yard slopes toward the house, water sits. A French drain, regrading, or both usually fix it.
Get a free quote in Kennesaw
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.