Retaining Wall Construction in Savannah, GA

Retaining wall construction builds engineered walls that hold back soil, manage grade changes, and protect your property from erosion — designed with the drainage that coastal Georgia sites demand.

Retaining Walls Built for Coastal Drainage

On the coast, a retaining wall lives or dies by its drainage. We engineer proper footings, reinforcement, and behind-wall drainage so water pressure never builds up and topples the wall.

What Retaining Wall Construction Includes

• Site assessment, grade, and load design
• Engineered footings and reinforcement
• Block, concrete, or stone wall construction
• Behind-wall drainage and French drains

When You Need a Retaining Wall

• Sloped lots and grade changes
• Erosion control near water or slopes
• Creating level, usable yard space
• Replacing a failed wall

Retaining Wall Types We Build for Savannah & Coastal Georgia Properties

Choosing the right wall system is the first design decision, and the best
choice depends on wall height, the grade change you are managing, and the soil
conditions on your Savannah lot. At Solid Foundation Repair Of Savannah, we
build the full range of retaining wall types used across Chatham County and
the coastal Georgia Lowcountry, matching the material to the job rather than
forcing one product onto every site.

• Segmental block (SRW): Interlocking concrete units that
  stack without mortar, relying on their geometry and a compacted base for
  strength. The open joints between blocks help shed water, making them a
  popular, flexible choice for terraced yards and grade changes.
• Poured concrete & CMU (block): Reinforced cast-in-place
  concrete or grouted concrete masonry units create rigid, high-capacity walls
  for taller runs, heavier loads, or where a smooth engineered face is
  required.
• Timber: Pressure-treated timber walls suit lower landscape
  tiers and garden beds, though they have a shorter service life than concrete
  in our humid, high-moisture climate.
• Natural stone & veneered walls: For properties in
  Savannah’s historic districts, stone faces and veneers deliver the look
  homeowners want while a structural core holds the grade.

Why Drainage Is the Most Critical Detail in Savannah Retaining Walls

Trapped water behind the wall is the single leading cause of retaining wall
failure, and coastal Georgia stacks the deck against poorly drained walls.
Savannah’s high water table, sandy and expansive soils, and heavy seasonal
rainfall mean water builds up behind a wall fast. When it cannot escape,
hydrostatic pressure pushes the wall forward, causing it to lean, bow, crack,
or fail outright. Every wall we design is built to move that water out, not
hold it in.

• Gravel backfill: We backfill directly behind the wall with
  clean, angular crushed stone (typically 3/4 to 1-1/2 inch), never pea gravel
  or sand, which hold water. A minimum drainage zone of roughly 12 inches is
  standard and increases with wall height.
• Perforated drain pipe: A 4-inch perforated pipe set at the
  base of the wall collects water from the gravel zone and carries it to a
  safe daylight outlet away from the structure.
• Weep holes: Small openings let any water that reaches the
  wall face drain through rather than pooling behind it.
• Geotextile fabric: A filter fabric separates the drainage
  stone from the native soil so fine particles do not migrate in and clog the
  system over time.

Footing, Base Prep & Compaction on Coastal Soils

A retaining wall is only as stable as the base it sits on, and that base work
is where Savannah’s soft, water-laden soils demand extra attention. We
excavate down to firm, undisturbed soil, then build a compacted, level
leveling pad of crushed stone to spread the load and resist settlement.
Footings are seated below grade on solid ground so seasonal moisture swings
and freeze-thaw cycles do not undermine the wall.

• Excavate to undisturbed subgrade and remove soft or organic material.
• Install and compact a crushed-stone base pad in lifts to a uniform, level
  line.
• Compact backfill in layers (roughly every 3 to 4 inches) as the wall rises,
  rather than dumping and compacting only at the end.
• Batter or step taller walls back into the slope so the retained mass works
  with gravity instead of against it.

This is the same base discipline that governs sound
foundation repair work,
and it is why proper prep matters as much as the wall units themselves.

Height, Engineering & Permits: When Your Savannah Wall Needs More

As a general rule across most jurisdictions, retaining walls up to about 4
feet tall (measured from the base of the footing to the top) can be built
without a permit, as long as they carry no surcharge load. Once a wall exceeds
that threshold, or when it supports a driveway, structure, steep slope, or
additional soil load above it, a building permit and an engineered design from
a licensed engineer are typically required.

• Under ~4 feet, no surcharge: Usually buildable without a
  permit, but drainage and base prep still make or break longevity.
• Over ~4 feet or load-bearing: Expect engineering, and often
  geogrid soil reinforcement tied back into the hillside for stability.
• Tiered walls: Multiple short walls stacked up a slope can
  behave as one tall wall and may trigger engineering review.

Local rules vary by jurisdiction, so we confirm requirements with the Chatham
County or City of Savannah building department for your specific scope before
we dig, keeping your project code-compliant from the start.

Signs You Need a New or Rebuilt Retaining Wall in Savannah

Retaining walls fail gradually, then suddenly. Catching the early warning
signs protects your landscape, your foundation, and your budget before a wall
collapses and takes soil with it. If you see any of the following on your
coastal Georgia property, it is worth a professional look.

• The wall is leaning, tilting, or bulging forward.
• Cracks are opening in the face or the wall is separating at the joints.
• Soil, mulch, or water is washing out around or beneath the wall during rain.
• Blocks are shifting, gaps are widening, or the top course is no longer
  level.
• Standing water or persistent saturation is pooling behind the wall.

Solid Foundation Repair Of Savannah designs, builds, and rebuilds retaining
walls engineered for our Lowcountry soils and drainage challenges. Call
(912) 642-3890 or request a
free estimate to protect your grade the right way.