Retaining Wall Cost Estimator
Estimate retaining wall cost based on dimensions and material.
E.g., MegaWall, Pisa, Mini-Creta (50+ year lifespan)
Cost Estimate
Wall Face Area
60 sq ft
Estimated Total Cost
$2,100 – $3,000
Based on $35 to $50/sq ft of face area installed
Methodology & Notes
Estimates are based on typical Montreal pricing of $35-$65/sq ft of wall face installed. Actual cost varies by site accessibility, drainage requirements, foundation type, and wall height (walls over 4 ft often require engineering). Wood walls have a shorter lifespan than stone or block.
Get an Accurate Free Estimate
These calculators provide rough estimates. For an exact price, call us or send photos of your project.
“In Montreal, I never build a retaining wall without a proper drainage system behind it — weep holes and perforated pipe are essential. Water pressure from our spring thaw is the number one reason walls fail within five years.”
How to use this tool
Enter the planned length and height of your retaining wall. Select the material: concrete block is the most common and affordable, natural stone offers a premium look, and pressure-treated timber is the most economical for low walls under 2 feet. The calculator estimates total material and labour costs based on typical Montreal contractor pricing. For walls over 4 feet, engineering certification is required in Quebec.
Why it matters
Retaining walls serve both functional and aesthetic purposes in Montreal landscapes. They prevent soil erosion on sloped properties, create usable flat areas in hilly yards, and add visual structure to garden designs. In Quebec, walls over 4 feet require engineering plans, and walls over 6 feet need a building permit. The type of material significantly affects both the initial cost and the long-term maintenance: concrete block systems are engineered for Quebec's freeze-thaw cycles, while natural stone requires skilled masons but provides unmatched curb appeal.
Frequently Asked Questions
How much does a retaining wall cost per linear foot in Montreal?
In Montreal, a retaining wall costs $25 to $60 per sq ft of face area in 2026. A 3-foot-high, 20-foot-long concrete block wall runs roughly $1,500 to $3,600 installed. Natural stone is 30-50% more. Call Montréal Paysagement Pro at 514-900-3867 for a precise quote.
Do I need a permit for a retaining wall in Montreal?
In Quebec, retaining walls over 4 feet high require engineering certification, and walls over 6 feet need a building permit. Even smaller walls may need approval if they affect drainage patterns. Always check with your Montreal borough before construction.
What is the best material for retaining walls in Quebec?
Interlocking concrete blocks are the most popular retaining wall material in Quebec because they handle freeze-thaw cycles well and don't need mortar. Natural stone looks premium but costs more. Pressure-treated timber works for low walls under 2 feet but has a shorter lifespan.