How much does a retaining wall cost?
Building a retaining wall costs $35 to $65 per square foot in the United States, including materials and professional labour, according to HomeGuide, updated in January 2026. Height is the threshold that matters: HomeGuide notes that walls over four feet need engineering, permits and deeper foundations, and the price steps up rather than sliding. LawnStarter, updated 5 October 2026, puts most retaining walls at $20 to $53 per square foot of wall face, $33 on average.
$35 – $65
per square foot, installed
Cost breakdown
Each table below comes from one source, named underneath it, with the date that source last revised the figures. Everything is a United States figure in USD.
Retaining wall cost by length and height
| Wall length (linear feet) | 2 ft tall | 4 ft tall | 6 ft tall |
|---|---|---|---|
| 10 | $700 – $1,300 | $1,400 – $2,600 | $2,100 – $3,900 |
| 15 | $1,050 – $1,950 | $2,100 – $3,900 | $3,150 – $5,850 |
| 25 | $1,750 – $3,250 | $3,500 – $6,500 | $5,250 – $9,750 |
| 50 | $3,500 – $6,500 | $7,000 – $13,000 | $10,500 – $19,500 |
| 100 | $7,000 – $13,000 | $14,000 – $26,000 | $21,000 – $39,000 |
| 150 | $10,500 – $19,500 | $21,000 – $39,000 | $31,500 – $58,500 |
| 200 | $14,000 – $26,000 | $28,000 – $52,000 | $42,000 – $78,000 |
Cost per square foot by wall type
| Type | Cost per square foot |
|---|---|
| Segmental | $15 – $35 |
| Sheet piling | $15 – $50 |
| Gravity | $20 – $50 |
| Cantilevered | $40 – $80 |
| Anchored | $50 – $150 |
Cost per square foot by material
| Material | Cost per square foot |
|---|---|
| Vinyl | $10 – $20 |
| Concrete block | $15 – $40 |
| Wood or timber | $15 – $30 |
| Poured concrete | $20 – $45 |
| Natural stone | $20 – $95 |
| Brick | $30 – $60 |
| Steel or metal | $40 – $150 |
Retaining wall cost per square foot by material, from a second source
| Material | Per square foot |
|---|---|
| Vinyl | $10 – $15 |
| Wood | $13 – $35 |
| Interlocking blocks | $15 – $35 |
| Cinder blocks | $15 – $40 |
| Brick | $17 – $43 |
| Poured concrete | $20 – $40 |
| Natural stone | $20 – $90 |
| Steel | $42 – $137 |
A bar for each row of the table above, 7 of them, drawn to the same scale so the spread is visible at a glance. The figure beside each bar is the one the table prints.
What changes the price
- Height above four feet
- This is the line where a landscaping job becomes an engineered structure, with drawings, permits and a deeper footing. Designing to just under it is a real decision, not a trick.
- What the wall is holding back
- Wet or clay soil pushes harder than free-draining ground, and a wall with a driveway or a building above it is carrying a surcharge. Both change the wall type you are allowed to use.
- Drainage
- Gravel backfill, a perforated pipe and weep holes are what stop water pressure building behind the wall. They are not optional and they are in every honest quote.
- Access for machinery
- A back garden a digger cannot reach is a wall built by hand, and the labour hours go up accordingly.
- Minimum project size
- HomeGuide notes that most retaining wall contractors hold a project minimum of $1,500 to $3,000, so a very small wall may not cost proportionally less.
How to pay less
- Terrace instead of going tall
- Two short walls with a planted step between them often avoid the engineering threshold that one tall wall triggers.
- Choose block over stone
- Concrete block is the cheapest durable option on the material table and it takes a facing later if you change your mind.
- Do the excavation yourself
- If access allows, clearing and levelling ahead of the crew takes hours off the quote.
- Do not skip the drainage to save money
- It is the one line where the saving reliably costs more than it saved, because a failed wall is rebuilt rather than repaired.
Questions
Do I need a permit for a retaining wall?
In most jurisdictions above a set height, commonly four feet, and sooner if the wall carries a surcharge such as a driveway. Check locally before you buy materials.
How long does a retaining wall last?
HomeGuide gives pressure-treated timber twenty to thirty years, poured concrete fifty to a hundred, brick over a hundred and natural stone a hundred to two hundred, with proper installation.
What is the cheapest kind of retaining wall?
Vinyl and segmental block sit at the bottom of the material and type tables. For a short decorative wall either is adequate; neither is the answer for a tall engineered one.
Can I build a retaining wall myself?
A low segmental block wall is a realistic DIY project. Anything tall, anything holding back a structure, and anything an engineer has drawn is not.
Where these figures come from
-
How Much Does a Retaining Wall Cost?
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How Much Does a Retaining Wall Cost in 2026?