![]() Locations with groundwater issues require a concrete base in some cases. Gabion walls don’t need a foundation when built on level bedrock or highly compacted ground. Most gabion walls need foundations of 2” to 6” of road-base rock. Proper groundwater drainage extends the lifespan. Stone retaining wall FAQs How long do stone retaining walls last?Ī natural stone retaining wall lasts 50 to 200 years on average, depending on the stone type, construction method, and installation quality. Old wall removal – Excavation of old walls and dirt costs $130 to $230 per cubic yard, including disposal. Permits – A permit costs $50 to $250, depending on the wall size and local building codes.Įngineering plans – A structural engineer costs $100 to $220 per hour for designing walls higher than 3’ to 4’ tall. Landscaping repairs – Additional landscaping costs $50 to $100 per hour or $4 to $12 per square foot for repairs.īackfill – Delivering fill dirt costs $150 to $600 per truckload or $15 to $50 per yard. Removing hard clay or rocky soil requires heavy machinery.ĭrainage – Installing a French drain costs $10 to $30 per linear foot to prevent erosion and soil pressure building behind the retaining wall. Soil clearing – Tree stump removal costs $160 to $350 on average. level ground – Retaining walls on sloped land cost up to 3 times more than on flat ground due to deeper footings and more drainage. Site leveling – Land grading costs $0.40 to $2.00 per square foot.īuilding on slopes vs. Site access – Labor increases for rugged terrain and sites where delivery trucks and machinery can’t reach. Labor costs – Builders charge $40 to $80 per hour or $10 to $30 per square foot, depending on the retaining wall type and location. A reinforced concrete footer costs $18 to $55 per linear foot for most walls more than 3’ to 4’ tall.ĭelivery – Stone delivery costs $30 to $100 on average or $5 to $10 per ton. Length and height – Taller retaining walls need stronger and deeper foundations with more reinforcements, increasing the labor time.ĭesign – Complex walls with curves, steps, mosaics, and other custom designs take more labor time.įoundation – A gravel subgrade base costs $1 to $3 per square foot to stabilize simple garden walls. ![]() Site location and land conditions greatly affect the various cost factors to build a large stone retaining wall: Cost to build a large stone retaining wall Limestone retaining wall blocks prices Metricīoulders cost $100 to $350 per ton on average or up to $600 per ton for extra-large boulders, excluding delivery and installation. Various shades of grey, brown, and grey-blue slate are available. Slate walls have a high damage resistance and are ideal for dry-stacked stone garden walls 2’ to 3’ tall. Slate retaining wall costĪ slate retaining wall costs $30 to $85 per square foot installed. ![]() Total costs depend on the block style, size, texture, and wall design options. Keystone brand block prices alone are $7 to $15 per block on average. Keystone retaining wall costĪ Keystone retaining wall costs $20 to $55 per square foot installed. Limestone retaining walls are common for terraced stairs, garden walls, and dry-stacked walls 2’ to 4’ tall. Limestone retaining wall costĪ limestone retaining wall costs $25 to $70 per square foot installed. “Fieldstone” means natural rocks like sandstone, limestone, or granite found on the ground’s surface while clearing land. Dry-stacked stone retaining wall in backyard Fieldstone retaining wall costĪ fieldstone retaining wall costs $20 to $80 per square foot installed. *Total installed cost, including compacted gravel base. Gabion retaining wall in residential backyardįlexible and permeable structures allow extra drainageĪ dry-stack stone retaining wall costs $20 to $85 per square foot installed, depending on the stone type and local availability.ĭry stack stone cost per square foot Rock type Landscaping rock prices are $45 to $130 per ton for a gabion wall. Installers typically fill these wire boxes with rip rap, river rocks, or crushed concrete. Requires access for mini excavator on the propertyĭoesn’t need mortar or concrete to installĪ gabion retaining wall costs $10 to $40 per square foot installed, depending on the stone type, wall depth, machine accessibility, land slope, and footings. Large boulder retaining wall with steps leading to house A boulder retaining wall is typically less than 4’ tall and takes up more space than a concrete retaining wall. Boulder retaining wall costĪ boulder retaining wall costs $25 to $50 per square foot installed, depending on the boulder size. *Materials & labor for retaining walls 2’ to 4’ high. Stone retaining wall cost per foot Stone type
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