Retaining Wall Permit Guide for Georgia

Retaining Wall Permit Guide for Georgia

Retaining walls are common in Georgia's hilly terrain, especially in the northern counties. Knowing when a permit and engineering are required is essential.

When a Permit Is Required

Most Georgia jurisdictions require a permit for retaining walls that are:

• Over 4 feet in height — Measured from bottom of footing to top of wall
• Supporting a surcharge — Any wall supporting a slope, building, driveway, or other load above it
• Near property lines — Walls that could affect neighboring properties
• Part of a building permit — Walls shown on a site plan for new construction

Engineering Requirements

PE-stamped engineering is required for:

• Walls over 4 feet — Must be designed by a licensed engineer
• Walls with surcharge loads — Slopes, buildings, vehicles above
• Segmental retaining walls (SRWs) — When over 4 feet or with surcharge
• Concrete masonry walls — Reinforced and designed for soil pressure
• Cantilever walls — T-shaped concrete walls

What Engineering Includes

Retaining wall engineering covers:

1. Soil analysis — Bearing capacity, friction angle, cohesion
2. Wall design — Height, thickness, reinforcement
3. Footing design — Size and reinforcement for stability
4. Drainage design — Weep holes, drain tile, gravel backfill
5. Global stability — Overall slope stability analysis (for taller walls)
6. Connection details — For SRW walls, geogrid reinforcement

Common Retaining Wall Failures

• Inadequate drainage — Hydrostatic pressure buildup causes wall failure
• Insufficient footing — Wall overturns or slides
• Poor backfill material — Clay soils expand and push the wall
• No geogrid — SRW walls over 4 feet need reinforcement
• Surcharge not accounted for — Parking or building above the wall

Georgia Building Code

Retaining walls must comply with:

• International Building Code (IBC) Chapter 18 — Soils and foundations
• International Residential Code (IRC) — For residential walls under 4 feet
• Georgia State Amendments — Local modifications

Materials

• Concrete — Poured-in-place, most durable
• CMU (Concrete Masonry Units) — Reinforced block walls
• Segmental Retaining Wall (SRW) — Interlocking concrete blocks
• Timber — Treated wood, typically for lower walls

Call (833) 205-7710 for retaining wall engineering.

Need Engineering for Your Retaining Wall?

If your retaining wall exceeds the height thresholds above or your building department requires engineering, we provide PE-stamped retaining wall design and permit plans for projects across Georgia. Call (833) 205-7710 for a free quote.