London, Ontario — Asphalt Paving Contractors (226) 272-4639
London, Ontario
A Division of Asphalt Paving

London
Retaining
Wall Experts

London's heavy clay soil demands expertly engineered retaining walls. We deliver drainage solutions that withstand Ontario's freeze-thaw cycles.

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Fully Insured & WSIB
Free On-Site Estimates
Permit-Ready Work
No Subcontracting

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(226) 272-4639
Built for London

Built for London's Heavy Clay and Deep Frost

London's heavy clay soil presents unique challenges for retaining wall construction. The Thames River watershed's clay-rich earth retains water, creating hydrostatic pressure that can destroy improperly built walls. Combined with Ontario's 1.2 to 1.5 metre frost depth, foundations must be engineered to prevent frost heave and seasonal movement that plague many installations.

We've built walls across London neighbourhoods from Old North to Wortley Village, working directly with the City of London's Building Division for proper permits. Many 1970s-era walls in established areas like Byron and Westmount are now failing due to inadequate drainage and shallow footings that don't account for London's clay soil expansion and deep frost penetration.

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What We Build

Retaining Wall Services in London

From small garden walls to large-scale erosion control — every project in London handled start to finish.

Concrete block retaining wall installation in London
01 — Installation

Concrete Block Walls

Allan Block and Versa-Lok systems engineered for London's 1.5-metre frost depth. Heavy clay requires specialized base preparation and drainage.

Armour stone retaining wall
02 — Natural Stone

Armour Stone Walls

Natural limestone armour stone suits London's rolling terrain perfectly. Creates attractive, durable walls that handle clay soil movement.

Interlocking retaining wall system
03 — Interlocking

Interlocking Systems

Complement your retaining wall with interlocking stone patios and walkways. Popular in London's heritage neighbourhoods like Woodfield.

Retaining wall repair
04 — Repair

Wall Repair & Rebuild

London's freeze-thaw cycles and clay soil cause wall lean and cracking. We diagnose foundation issues and rebuild to current standards.

Erosion control and drainage solutions
05 — Erosion Control

Erosion Control & Drainage

Thames River tributaries and clay slopes need proper erosion control. Gabion baskets and plantings protect your London property investment.

Retaining wall design and permit handling
06 — Design & Permits

Design & Permit Handling

City of London Building Division requires permits for walls over 1 metre. We handle engineering sign-off and permit applications professionally.

Why Choose Us

What Sets Us Apart

Frost-Proof Engineering

London's frost depth averages 1.2–1.5 metres. Every wall we build accounts for proper footing depth and drainage to prevent heaving, cracking, and lean over time.

Permit-Ready Work

We know London's permit requirements inside-out. Walls over 1m need a building permit — we handle all paperwork and engineering sign-off to keep your project legal and inspected.

Fully Insured & WSIB Covered

$2M liability insurance and WSIB coverage on every job. You're protected — and so is our crew. Never hire an uninsured contractor for structural work on your property.

No Subcontracting

The crew that gives you the quote builds your wall. No surprises, no strangers on your property — the same experienced team from first shovel to final cleanup.

How It Works

1

Free On-Site Estimate

We visit your property, assess the grade, soil, and drainage — and give you a detailed written quote at no charge.

2

Design & Permits

We handle drawings and City permit applications for walls over 1 metre. You'll see exactly what's being built before we break ground.

3

Installation

Proper excavation, base prep, drainage aggregate, and block placement — every step done to spec, no shortcuts.

4

Cleanup & Walkthrough

We leave your property clean, walk you through the work, and you're left with a wall built to last 20–30 years.

Client Reviews
"
★★★★★

Had our failing 1970s wall in the backyard completely rebuilt last spring. The crew handled the clay soil excavation professionally and the new drainage system has kept our basement dry through this wet fall. Highly recommend their work.

Sarah M.
Byron, London · Google Review
Common Questions

Retaining Wall FAQ

Everything London homeowners ask us before starting a retaining wall project.

Concrete block walls typically cost $150-300 per linear foot in London, while armour stone runs $200-450 per linear foot. London's heavy clay soil often requires additional excavation and specialized drainage, affecting costs. Engineering fees for walls over 1 metre add $800-2000. Contact us for a free, detailed quote based on your specific site conditions.

Yes, the City of London Building Division requires permits for retaining walls over 1 metre in height. Walls over 1.5 metres need professional engineering sign-off under Ontario Building Code. Permits take 2-4 weeks and cost $150-400. We handle all applications and coordinate with city inspectors to ensure full compliance and protect your investment.

London's frost depth reaches 1.2-1.5 metres, requiring footings below this level to prevent frost heave. Ontario's 40-60 annual freeze-thaw cycles crack poorly built walls. Spring drainage is critical as clay soils retain moisture, creating pressure that can destroy walls without proper drainage systems and reinforcement.

London's heavy clay soil expands and contracts dramatically with moisture changes, creating pressure that pushes walls outward. Poor drainage allows water buildup, especially during spring melt. Many older walls have shallow footings above the frost line, causing heaving. Clay soil retains moisture longer, maintaining high hydrostatic pressure. Professional assessment determines whether repair or replacement is needed.

Concrete block systems like Allan Block or Versa-Lok perform excellently in London's clay soil when properly drained. They handle freeze-thaw cycles and allow slight movement without cracking. Armour stone offers natural drainage and flexibility. Avoid timber in clay soil moisture. For walls over 2 metres, engineered block or stone with geogrid reinforcement provides optimal long-term performance.

Footings in London must extend at least 1.5 metres below grade to reach below the frost line. London's climate zone requires this depth to prevent frost heave from lifting wall foundations. In heavy clay soil, we often go deeper to reach stable bearing soil for optimal long-term performance.

While walls under 1 metre don't require London permits, clay soil conditions make professional installation advisable. Improper drainage leads to costly failures. DIY walls that fail and damage neighbouring property create liability issues. Clay excavation requires proper equipment. For permitted walls requiring engineering sign-off, professional installation ensures code compliance and protects your investment.

Simple walls under 1 metre take 2-5 days depending on length and access. Larger walls requiring City of London permits add 2-4 weeks for approval. Complex engineered projects take 6-8 weeks total. Spring construction may face clay soil delays when wet. We schedule around seasonal patterns for optimal conditions.

London's clay soil demands comprehensive drainage. We install 300-450mm of clear stone aggregate wrapped in filter fabric to prevent clay infiltration. Weeping tile at footing level connects to proper outlets. Clay's low permeability makes drainage absolutely critical to prevent hydrostatic pressure buildup that destroys even well-built walls.

Quality retaining walls typically return 60-80% of investment in London's market. They create usable yard space and improve curb appeal. In neighbourhoods like Byron or Wortley Village, well-designed walls complement heritage character. Walls that prevent basement flooding by improving drainage add significant value beyond aesthetics.

We provide a 5-year warranty on workmanship and installation, while manufacturers offer 25-50 year product warranties. Our warranty covers structural integrity, drainage function, and proper settlement. We don't cover external damage from impacts or utility work. All warranty work is performed promptly to maintain optimal performance.

Geogrid is synthetic reinforcement extending into soil behind walls, distributing loads for stability. Ontario Building Code requires it for walls over 1.8 metres or poor soil conditions. London's heavy clay often necessitates geogrid for shorter walls due to high lateral pressures. Given London's challenging conditions, geogrid provides excellent long-term stability insurance.

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No pressure, no obligation. We'll come to your property, assess the job, and give you a detailed written estimate — completely free. Most quotes delivered within 48 hours.

Call or Text(226) 272-4639
HoursMon–Fri 7am–6pm · Sat 8am–4pm
Service AreaLondon & Surrounding Area, Ontario
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