Retaining Wall Calculator — Calculate Materials, Cost & Construction

Retaining Wall Calculator

Calculate materials, cost, and construction details for your retaining wall project. Get accurate estimates for blocks, gravel, labor, and more based on your specific dimensions and material choices.

Step 1: Wall Dimensions

4 ft
1 ft

Wall Height Guidelines

For walls over 4 feet tall, consult a structural engineer. Most DIY retaining walls should be under 4 feet. Higher walls require proper engineering and may need building permits.

Step 2: Materials & Construction

6 in

Proper Drainage is Essential

Retaining walls require proper drainage to prevent water pressure buildup behind the wall. Always include drainage gravel and perforated pipe for walls over 2 feet tall.

Retaining Wall Estimate

Summary
Materials Breakdown
Cost Analysis

Estimated Total Cost

$1,840
For a 20 ft × 4 ft brick retaining wall
Wall Volume
80 cu ft
Blocks Required
320
Gravel Required
3.2 cu yd
Labor Hours
32 hrs

Materials Breakdown

Material Quantity Unit Cost Total Cost

Materials Note

These estimates are based on standard construction practices. Actual requirements may vary based on soil conditions, local codes, and specific product availability. Always add 10-15% extra material for waste and cuts.

Cost Breakdown by Material Type

Cost Factors

Factors Affecting Retaining Wall Cost:

1. Material Type: Concrete blocks are most economical, natural stone is premium

2. Wall Height: Higher walls require more engineering and materials

3. Site Accessibility: Difficult access increases labor costs

4. Soil Conditions: Rocky or unstable soil requires special preparation

5. Local Labor Rates: Vary significantly by region

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