Deck Building Cost in London (2026)
Average cost in London
$8,000 — $75,000
$30 — $120 per sq ft
Cost Breakdown
ItemizedProfessional installation and framing
45%
Decking boards, joists, and hardware
42%
Demolition of old deck and grading
8%
City of London fees and structural plans
5%
HST at 13%
📋What's Included
ScopeTypically Includes
- Pressure-treated lumber
- Concrete footings
- Railing system
- Stairs (1 set)
- Hardware & fasteners
- Labor
Typically Excludes
- Composite or hardwood decking
- Built-in seating or planters
- Pergola or roof
- Lighting
- Permits
Based on a standard 200 sq ft pressure-treated wood deck.
🧮Estimate Your Cost
InteractiveEstimated Cost
$5,960 — $8,940
Based on 8 sources and market data for London. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$21,855
Today
$22,839
Deck Building in London is ↑ 4.5% compared to roughly a year ago — about $983 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Deck Build Contractors in London
Verified providersCreative Custom Decks Inc.
3551 White Oak Rd Ste 324, London, ON N6L 1A3, Canada
73 reviews
Hickory Dickory Decks - London
37 Cedarwood Crescent, London, ON N6H 5P5, Canada
40 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Yes, a permit is required if the deck is attached to the house or if any part of the walking surface is more than 600 mm (24 inches) above the ground. In 2026, permit fees in London typically range from $250 to $400 for standard residential projects.
Due to London's heavy snowfall and deep frost line, footings must be set at a minimum depth of 1.2 meters (48 inches) to prevent structural shifting during the 100+ annual freeze-thaw cycles common in Southwestern Ontario.
While composite costs $50–$90 per sq ft compared to $30–$55 for pressure-treated wood, it is highly recommended for London. It withstands the region's 37°C temperature swings and high moisture levels without the annual staining required for wood, which costs $300–$500 per year in maintenance.
Homeowners in London can expect a return on investment of approximately 65% to 75% at resale. High-quality composite decks often command a premium in the local real estate market due to their 'zero-maintenance' appeal to buyers.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 2 weeks ago. Updates run weekly. All costs in CAD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.