Retaining Wall Cost in St. Louis 2026
Retaining Wall in St. Louis costs between $2,790 and $13,020 in 2026, with the average around $6,045. St. Louis pricing runs 7% below the US national average. Construction of a retaining wall with excavation, a gravel base, poured concrete or block, reinforcement, and drainage behind the wall. Includes backfill and grading.
What retaining wall includes in St. Louis
Construction of a retaining wall with excavation, a gravel base, poured concrete or block, reinforcement, and drainage behind the wall. Includes backfill and grading.
Typical time on site: 3 to 5 days. Local labor rate: $23/hour for an experienced concrete pro.
What changes the price of retaining wall in St. Louis
- Wall length and height
- Block versus poured concrete
- Drainage system
- Excavation and backfill
- Soil and slope conditions
A retaining wall quote priced off statewide averages will be off by 10 to 20 percent for St. Louis, because the metro has its own labor pool, material delivery distances, and permit timelines.
St. Louis climate and demand for concrete
Continental climate with hot humid summers, freeze-thaw winters, tornado and severe-storm exposure, and proximity to the New Madrid seismic zone.
St. Louis permits for retaining wall
Building department: City of St. Louis Building Division (Department of Public Safety). https://www.stlouis-mo.gov/government/departments/public-safety/building/index.cfm
Typical permit cost: $120 - $2,200 residential depending on valuation. Inspection time: 7-15 business days for residential plan review. St. Louis rule: St. Louis is an independent city, legally separate from surrounding St. Louis County, so its Building Division permits and licenses apply only within city limits and differ from county jurisdictions next door. The city requires licensed master trades and contractor business licenses, and its position near the New Madrid seismic zone means Missouri code carries seismic detailing provisions.
Missouri sales tax and licensing for Concrete
Missouri sales tax: 4.225% + local (~8.4% combined avg). Real property labor exempt. Contractor pays sales tax on materials at purchase.
State license: No statewide GC license; municipal (KC, St. Louis, Springfield) require local license, no statewide license, local registration required.
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