A compiled reference of 20 verified statistics on retaining wall costs in the United States: what a wall costs to build overall and per square foot, how the material sets both cost and lifespan, and what repairs cost when a wall starts to fail. Every figure is drawn from a named cost source, Fixr and Bob Vila, and independently checked against the original before publishing.
Retaining wall cost by material
Installed cost per square foot of wall face by material (Fixr).
Source: Fixr (fixr.com). Track spans $0 to $75 per square foot installed; bars mark each material's range.
Key statistics
Key takeaways
Retaining wall cost is a material decision that also sets lifespan, and the repair bill when one fails dwarfs the drainage that would have prevented it. The numbers below trace build cost, cost by material, and the cost of failure.
A retaining wall averages about $5,463 to $6,060.
Per square foot, it runs about $15 to $45 of wall face.
Timber is cheapest; natural stone and poured concrete priciest.
Repair averages about $750 ($250 to $1,250, up to $5,000).
Anchoring a leaning wall runs $60 to $80 per linear foot.
Adding drainage, the common failure fix, runs $70 to $90 per square foot.
How we built this report
Every figure was compiled in September 2026 from named cost sources and verified against the original before publishing.
- Compiled from two independent cost guides
Build cost and cost-by-material figures from Fixr and Bob Vila; repair and failure-mode figures from Fixr.
- Two sources, shown side by side
The two guides land close on the average ($5,463 versus $6,060) and diverge on material ranges, so we show both.
- Only explicitly stated figures
We include only numbers a named source states directly, and attribute each inline at the point it appears.
- Independent review
Written by one co-founder, reviewed by the other before publishing.
Scope note: these are national averages and ranges from consumer cost guides and vary widely by material, wall height and length, soil and slope, drainage, and region; they are directional, not quotes. Per-square-foot figures are for the wall face, installed, unless noted otherwise.
Retaining walls, by the numbers
All 20 figures, grouped into three themes, each from a named cost source and independently verified against the original.
What a retaining wall costs to build
The two leading cost guides agree closely on the headline. According to Fixr (fixr.com), a retaining wall averages about $5,463, and Bob Vila (bobvila.com) puts it at $6,060, both landing most projects in the low-to-mid five figures.
Statistic 1
A retaining wall averages about $5,463, with most projects between $3,500 and $10,000.
Fixr
Statistic 2
The full range spans about $1,239 to $12,029 depending on size and material.
Fixr
Statistic 3
A second guide puts the national average at $6,060, typically $3,199 to $9,196.
Bob Vila
Statistic 4
Per square foot of wall face, a retaining wall runs about $15 to $45.
Fixr
Statistic 5
Labor runs about $50 to $75 per hour, or $10 to $50 per square foot.
Bob Vila
What this means: The tight agreement between two guides ($5,463 and $6,060) makes the ~$5,000-to-$6,000 average a reliable planning number for a modest wall. But "retaining wall" spans a garden border and an engineered slope hold, so the per-square-foot-of-face figure, times the wall's height and length, is the honest way to size a specific job.
Cost by material
Material is the biggest cost driver and sets the wall's lifespan too. According to Fixr (fixr.com) and Bob Vila (bobvila.com), it runs from timber at the low end to natural stone at the top, with concrete block the popular middle.
Statistic 6
Wood or timber is the cheapest, about $10 to $15 per square foot (Bob Vila: $15 to $30).
Fixr / Bob Vila
Statistic 7
Gabion (wire-caged rock) walls run about $10 to $40 per square foot.
Fixr
Statistic 8
Concrete block runs about $10 to $50 per square foot, the popular mid-range choice.
Fixr
Statistic 9
Brick runs about $20 to $25 per square foot (Bob Vila: $10 to $45).
Fixr / Bob Vila
Statistic 10
Poured concrete runs about $30 to $40 per square foot.
Fixr
Statistic 11
Natural stone is the priciest common material, about $25 to $75 per square foot (Bob Vila: up to $100).
Fixr / Bob Vila
Statistic 12
Engineered options cost more: railroad tie $25 to $30, rammed earth $20 to $30, steel $40 to $60, and I-beam $40 to $90 per square foot.
Bob Vila
Statistic 13
Overall, material costs alone can range from about $5 to $200 per square foot.
Bob Vila
What this means: The material choice is a lifespan choice as much as a cost one: timber is cheapest to build but the shortest-lived, while block, concrete, and stone last for decades. On a property you plan to hold, the durable materials usually win once you price in the rebuild that a rotting timber wall eventually forces.
Repair, and the cost of failure
A failing retaining wall is expensive precisely because it holds a hillside. According to Fixr (fixr.com), a basic repair averages $750, but anchoring a leaning wall or rebuilding a failed section runs into the thousands.
Statistic 14
Retaining wall repair averages about $750, ranging $250 to $1,250 (up to $5,000 for major work).
Fixr
Statistic 15
Adding drainage, the most common structural fix, runs about $70 to $90 per square foot.
Fixr
Statistic 16
Anchoring (tiebacks) to reinforce a leaning wall runs about $60 to $80 per linear foot.
Fixr
Statistic 17
Rebuilding a damaged section runs about $70 to $125 per linear foot.
Fixr
Statistic 18
Repairing wood rot runs about $40 to $60 per square foot.
Fixr
Statistic 19
Repair contractors charge about $50 to $200 per hour, plus a $50 to $100 call-out fee.
Fixr
Statistic 20
Adding waterproofing or drainage extends a retaining wall's lifespan and costs a fraction of a rebuild.
Fixr / Bob Vila
What this means: Retaining walls fail from water, not weight: pressure builds behind a wall with poor drainage until it leans, bulges, and lets go. Caught early, the fix is drainage; caught late, it is anchoring or a rebuild at $70-plus a foot, plus whatever the slope did on its way down. A bulging or tilting wall on a guest property is also a safety hazard, which is why wall condition (lean, cracks, bulge, blocked weep holes) belongs on a documented exterior inspection.
Cite this study
Academic or press use: copy a ready-made reference. RapidEye is the publisher.
Quick FAQ
How much does a retaining wall cost?
A retaining wall averages about $5,463 to $6,060, according to Fixr (fixr.com) and Bob Vila (bobvila.com), with most projects between roughly $3,200 and $10,000. Per square foot of wall face, it runs about $15 to $45, driven mostly by the material and the wall's height and length.
What is the cheapest retaining wall material?
Wood or timber is the cheapest at about $10 to $30 per square foot installed, followed by gabion and concrete block, according to Fixr (fixr.com) and Bob Vila (bobvila.com). Poured concrete and natural stone are the most expensive common materials, with stone running $25 to $100 per square foot. Timber is cheapest but has the shortest lifespan.
How much does it cost to repair a retaining wall?
Retaining wall repair averages about $750, ranging from $250 to $1,250 for most jobs and up to $5,000 for major work, according to Fixr (fixr.com). Adding drainage runs $70 to $90 per square foot, anchoring a leaning wall $60 to $80 per linear foot, and rebuilding a section $70 to $125 per linear foot.
Why do retaining walls fail?
Retaining walls most often fail from water pressure behind the wall when drainage is inadequate, which is why adding drainage is a common repair. A leaning or bulging wall is a failure sign that requires anchoring (tiebacks) or rebuilding, both far more expensive than the original drainage would have been.
Data sources
Every figure traces to one of these named sources, each checked against the original before publishing. We name each source and show its root domain, but do not hyperlink external sources; internal links stay live.
FixrRetaining wall build and repair cost datafixr.com
Bob VilaRetaining wall cost and cost-by-material databobvila.com