How Much Does a Retaining Wall Cost in Knoxville? (2026)

Retaining walls are one of the most common needs on Knoxville’s hilly lots — and one of the most misquoted. Here’s how they’re actually priced in 2026 and what moves the number.

The short answer

Retaining walls are priced per face square foot (wall height × length, the visible face), not by the linear foot. In the Knoxville area, expect roughly:

• Segmental block wall: ~$48–$60 per face sq ft
• Natural stone / boulder wall: ~$55–$75+ per face sq ft
• Taller walls needing geogrid + engineering: at the higher end and up

A wall 3 ft tall × 30 ft long = 90 face sq ft, so roughly $4,300–$5,900+ depending on type.

What drives the price

• Height. Taller walls hold back exponentially more soil and need reinforcement — cost climbs fast with height.
• Drainage. Gravel backfill and a drain line aren’t optional; they’re what keep the wall from failing. Budget for them.
• Wall system. Standard block is the value option; premium block, natural stone and boulders cost more.
• Geogrid & engineering. Walls over ~3–4 ft usually need soil reinforcement and, past 4 ft, an engineered design and permit.
• Site access & excavation. Steep, tight or rocky sites add labor.

Why the cheap wall costs more later

The bids that come in thousands low almost always skip the drainage and backfill — the stuff behind the wall you can’t see. That’s exactly why retaining walls fail, and rebuilding a collapsed wall costs far more than building it right once.

Get an itemized quote

Wall cost depends on your slope, soil and height — we measure and give you an itemized estimate.

Book a free phone consultation → or call (865) 237-9770.