Professional Wall Services
Concrete block retaining walls in Nanaimo
Durable interlocking block walls built for long-term slope retention and clean landscape tiers.
Nanaimo Retaining Walls builds concrete block retaining walls across 8 Vancouver Island communities. We install interlocking block systems with compacted gravel bases and crushed rock backfill. You receive a free site visit and a written quote priced at $15–$40 per sq. ft. of wall face.
Concrete block retaining walls cost between $15 and $40 per sq. ft. of wall face.
Interlocking block features and strength
Concrete block retaining walls utilize heavy pre-cast units that lock together without mortar. These systems provide exceptional structural weight to hold back sloped earth on steep yards. You can review all material pricing options in our complete cost guide.
Proper base trenches and backfill stone
A lasting block wall relies on a level footing of compacted road mulch or crushed rock. We install drainage behind the wall with clean angular stone and perforated pipe to allow water movement. Soil is kept separated from the gravel with geotextile fabric.
Design options and step unit finishing
Interlocking blocks come in textured rock faces and standard grey finishes to complement your yard. We cap the top course with matching block caps secured with masonry adhesive. You can check your local building rules in our guide to retaining wall permits.
Concrete block system options
Segmental block walls
Heavy textured block units stacked on gravel bases for residential yard terracing.
Large structural block systems
Large-format block units designed for tall bank retention and heavy earth loads.
How we build concrete block walls
- 1
base excavation — excavate trench and compact aggregate footing base
- 2
setting base course — level first block tier on compacted gravel
- 3
block stacking — stack interlocking courses with drainage backfill
- 4
top cap placement — glue finish cap blocks and backfill topsoil
Local permit and building requirements
Permit regulations for modular block installations vary across municipalities. Building permits are needed for block projects over 1.2 metres in height in Nanaimo, Qualicum Beach, Ladysmith, and Duncan, or 1.2 m or higher in Parksville. Regional district regulations clarify that installations "under 1.0 m in height that retain less than 1.0 m of earth" are skipped from structure classifications.
People also ask
How long do concrete block walls last?
Interlocking concrete block walls provide durable, stable earth retention when built on a proper gravel footing with clean stone backfill.
Can block walls be built on steep slopes?
Yes, interlocking blocks handle steep slopes effectively when built with proper grid reinforcement behind the blocks.
Do concrete block walls require drainage pipe?
Yes, we install perforated drain tile behind every block wall to prevent water pressure build-up.
How much do concrete block walls cost?
Concrete block retaining walls cost $15 to $40 per sq. ft. of wall face.
You might also want drainage behind the wall, or see what these usually cost in the cost guide. See also guide to retaining wall permits.
Service areas across the region
More on retaining walls
- Retaining wall cost guideCompare prices per square foot across our five priced wall construction materials.
- Drainage behind the wallSub-surface drain tile and clear rock backfilling to channel groundwater away from the wall.
- Engineered retaining walls on taller buildsTall structural retaining builds reinforced with buried geogrid mesh layers.
- Nanaimo Retaining Walls home
Ready for a quote on retaining walls in Nanaimo?
We provide free on-site quotes.