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Retaining Wall Construction Cost in Union, MO
Detailed pricing guide with local market adjustments and material comparisons
Union Average
$2,550–$8,500
Market Tier
Small City
Cost Breakdown
Retaining Wall Construction Cost in Union
Small CityLowAverageHigh
$2,550$5,525$8,500
Market Tier
Small City (0.85x)
Small city with below-average costs
Material Cost Comparison
Retaining wall blocks or stone(Budget)
$1,913–$6,375Gravel for base and backfill(Mid-Range)
$2,550–$8,500Landscape fabric(Premium)
$3,570–$11,900Factors that affect your cost
- Wall length and height
- Material type
- Drainage system behind wall
- Excavation requirements
- Geogrid reinforcement needed
- Soil conditions
- Permit requirements (walls over 4 feet)
- Accessibility for equipment
Save Money with DIY?
Retaining walls under 3 feet tall are manageable DIY projects using interlocking landscape blocks. Excavate a level trench, add compacted gravel base, stack blocks with construction adhesive, and backfill with drainage gravel behind the wall.
Call a pro when: Hire a professional for walls over 3-4 feet tall (may require engineering and permits), walls supporting structures, walls on steep slopes, or natural stone walls requiring skilled masonry.
Get Quotes in Union
Ideal Landscape Group
Saint Louis, MO
(314) 892-9500GreenScapeSTL Landscaping and Outdoor Living
Saint Louis, MO
(314) 503-01932 Bros That Mow- Lawn & Landscape
Saint Louis, MO
(314) 795-4137Founding Member
Premium spot in Union
Ambassador
Lead the Union community
Founding Member
Premium spot in Union
Union Housing Market
Median Household Income
$71,760
Median Home Value
$199,100
Median Rent
$847/mo
Homeownership Rate
62.9%
Population
12,560
Median Year Built
1996
Source: U.S. Census Bureau, ACS 2023 5-Year Estimates
Track Your Costs
Landscaping
Retaining Wall Construction
Date
April 2026
Cost
$5,525
Vendor
Your local pro
Warranty
10-year material warranty
Union average: $2,550–$8,500
Before
Issue documented with photos
After
Repair completed, area sealed
Materials Used
Retaining wall blocks or stoneGravel for base and backfillLandscape fabricDrainage pipe
Warranty Details
10-year material warranty
Auto-Checkup Created
"Retaining Wall Inspection" — every 24 months
Added by youApril 2026
Property Health Score
Fair
76
exterior category +8 pts(68 → 76)
Documentation19/25
Maintenance20/25
Warranty22/25
Investment21/25
Your health score is calculated based on documentation completeness, maintenance currency, warranty coverage, and investment tracking.
Get a Personalized Estimate
Find a landscaper near me
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I found 53 landscapers in your area. Here are the top results:
SM
Smith & Sons
Connectedlandscaper
4.9(47)
BookQuote
JR
J&R Home Services
landscaper
4.7(23)
From $95/hr
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Category:landscaper
Date:2026-04-04
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Cost FAQ
What is the average cost of retaining wall construction in Union?
The average cost of retaining wall construction in Union, MO ranges from $2,550 to $8,500. The final price depends on Wall length and height, Material type, Drainage system behind wall.
What factors affect retaining wall construction cost?
Key factors include: Wall length and height, Material type, Drainage system behind wall, Excavation requirements, Geogrid reinforcement needed, Soil conditions, Permit requirements (walls over 4 feet), Accessibility for equipment. In Union, local labor rates and material availability also influence pricing.
Can I save money by doing retaining wall construction myself?
Retaining walls under 3 feet tall are manageable DIY projects using interlocking landscape blocks. Excavate a level trench, add compacted gravel base, stack blocks with construction adhesive, and backfill with drainage gravel behind the wall. Hire a professional for walls over 3-4 feet tall (may require engineering and permits), walls supporting structures, walls on steep slopes, or natural stone walls requiring skilled masonry.
How do I get accurate quotes for retaining wall construction in Union?
Get at least 3 quotes from licensed professionals in Union. Use Fizbo SmartSearch to find and compare local landscapers, read reviews, and request estimates — all in one place.