Retaining Wall Cost in Knoxville, TN (Per Foot)
Retaining walls solve slope problems, create usable space, and add architectural interest. Here is what retaining walls cost in Knoxville and surrounding East Tennessee areas.
$8,000 - $150,000+
Per wall, typical range
Pricing reviewed June 2026 by Morales Outdoor Living
What to Expect
Every project is unique. These ranges reflect typical East Tennessee installations.
Small Garden / Planter Wall
$8k - $18k
- ✓Up to 20 linear feet
- ✓Under 4 feet tall
- ✓Segmental block or timber
- ✓Gravel base & drainage
- ✓No engineering required
Medium Structural Wall
$20k - $50k
- ✓20-50 linear feet
- ✓4 to 7 feet tall
- ✓Versa-Lok or Keystone block
- ✓Geogrid reinforcement
- ✓Drainage pipe & gravel
- ✓Permits & engineering
Large / Tiered Wall System
$60k - $150k+
- ✓50+ linear feet
- ✓8+ feet tall or terraced
- ✓Engineered with stamped plans
- ✓Geogrid & structural fill
- ✓Integrated stairs & lighting
- ✓Landscape integration
Financing available through HFS Financial
Flexible monthly payments, fast online approval, no home equity required. Options for every budget.
Pricing Factors
Wall Height & Length
Taller and longer walls require more block, more base course, and often engineering stamps and permits.
Block Type
Timber is cheapest but shortest lifespan. Segmental concrete block is the standard. Natural stone is premium in both cost and appearance.
Engineering Requirements
Walls over 4 feet typically require an engineering stamp and building permit in East Tennessee. This adds design cost but ensures safety.
Drainage Needs
Poor drainage behind a wall causes failure. We install drainage pipe, gravel backfill, and waterproofing as standard on structural walls.
Access & Site Conditions
Tight access, steep grades, and rocky soil increase excavation difficulty and equipment needs.
Stairs & Features
Integrated stairways, planters, lighting, and seating walls add function and cost to the base wall price.
Frequently Asked
How much does a retaining wall cost in East Tennessee?+
Retaining walls run about $8,000 to $150,000+. A short landscape wall under 4 feet runs $8,000 to $18,000, an engineered structural wall (4 to 7 feet) runs $20,000 to $50,000, and a tall or terraced system 8 feet and up runs $60,000 to $150,000+.
When does a retaining wall need engineering?+
In East Tennessee the rule of thumb is 4 feet: a wall over 4 feet of retained height, or any wall holding back extra load like a driveway or a slope above it, needs an engineered design and a permit, which we handle.
Why do retaining walls fail?+
Almost always water. Without proper drainage behind the wall, saturated clay soil builds pressure until the wall bows or fails. We build in gravel backfill, a drain pipe, and geogrid reinforcement so the wall lasts.
What is the most affordable wall type?+
Segmental concrete block is the standard and most cost-effective. Natural stone and boulder walls cost more but last a very long time. The deciding factor on lifespan is always the drainage and base prep, not the visible face.
Related Resources
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