PriceBee
Greater Toronto Area · Ontario

Retaining Wall Installation cost in King, ON

King homeowners typically pay $5,100 – $12,200 for retaining wall installation. Local labor and materials price 36% above the national average.

King average

$8,650

Typical low

$5,100

Typical high

$12,200

Per square foot

$34 – $82

Sample ZIP

L7B

What drives King pricing

Local labor

Skilled trades across King are unionised or association-backed, and GTA labour rates run well above the North American average — expect quotes in Canadian dollars roughly 36% higher than the US benchmark once exchange and local wages are factored in. Winter shuts down much exterior work, so the spring-to-fall window is the busiest and priciest.

Permits & code

King issues building permits through its municipal building department under the Ontario Building Code. Electrical work needs an ESA (Electrical Safety Authority) notification and inspection, gas work must be done by a TSSA-certified installer, and HVAC changes should be sized by an HRAI-trained contractor. New-home and major-renovation work may fall under Tarion warranty coverage, and lots near a river or ravine can require Conservation Authority approval before the city will issue a permit.

Climate & conditions

King has a cold continental climate with freeze-thaw cycles, heavy snow load and humid summers. Expect frost-depth footings, ice-and-water shielding on roofs, insulation upgrades to meet Ontario energy requirements, and exterior work scheduled between April and November.

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150 square feet

Estimated project cost

$5,130 $6,983

Most homeowners pay around $6,056

Compare quality / material level

Cost by material in King

Installed King pricing per square foot.

OptionInstalled cost
Treated timber$36 – $49
Segmental concrete block$49 – $65
Poured concrete$65 – $84
Natural stone / boulder$84 – $115

Where the money goes in King

A typical $8,650 King project, broken down by line item.

  • Labor0.45% · $39
  • Materials0.38% · $33
  • Permits & inspections0.05% · $4
  • Overhead & profit0.12% · $10

Common add-ons

Extras that show up on King quotes but rarely in the headline price.

Drainage gravel and pipe

$680 – $3,400

Engineering for walls over 4 ft

$1,100 – $4,100

Steps and caps

$545 – $2,700

Excavation and haul-off

$815 – $4,750

Ways to save in King

  • Keep walls under four feet to avoid engineering and permit costs.
  • Terrace two short walls instead of one tall one.
  • Collect three written bids on an identical scope — spreads of 20–40% are normal.
  • Book in the off-season and stay flexible on the start date to save 5–15%.
  • Bundle nearby work into one mobilization so you only pay setup and travel once.
  • Ask what the contractor would change to cut 10% without hurting durability.

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