How Much Does Retaining Wall Cost in Washington?
Washington pricing is above the national average. Updated for 2026.
Retaining Wall Pricing in Washington
In Washington, the average cost for retaining wall is $7,475 per project, which is 15% higher than the national average of $6,500. Most Washington residents pay between $3,450 and $17,250.
Washington has a higher cost of living than most states, which translates to higher labor rates and material costs. Urban areas within Washington may be even higher.
Retaining walls hold back soil on slopes, prevent erosion, and create usable flat areas. Materials include concrete block, natural stone, timber, and poured concrete.
Washington vs National Average
What Affects Retaining Wall Cost in Washington?
Material
Timber: $15-$25/sq ft. Concrete block: $20-$35/sq ft. Natural stone: $25-$50/sq ft. Poured concrete: $30-$60/sq ft
Height
2-3 ft: $20-$30/sq ft. 4-6 ft: $30-$50/sq ft. Over 6 ft: $40-$75/sq ft (requires engineering)
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💡 Tips to Save on Retaining Wall in Washington
- 1.Walls under 4 feet rarely need engineering permits
- 2.Concrete block is the most affordable option
- 3.Timber walls are cheapest but last only 15-20 years
- 4.Consider a terraced design to reduce wall height and cost
📈 Retaining Wall in Washington Cost Trends (2020–2024)
Prices have increased +17.7% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $6,349 | — |
| 2021 | $6,616 | +4.2% |
| 2022 | $7,046 | +6.5% |
| 2023 | $7,243 | +2.8% |
| 2024 | $7,475 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for Retaining Wall in Washington
Recent Reports
Frequently Asked Questions
Do retaining walls need a permit?
Usually yes for walls over 4 feet tall. Walls over 4 feet typically also require engineered plans, which cost $200-$500.
Retaining Wall Cost in Other States
Related Cost Guides for Washington
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