Deck Building Cost in London (2026)
Average cost in London
$6,000 — $75,000
$35 — $80 per sq ft
Cost Breakdown
ItemizedProfessional installation and framing
45%
Decking boards (Wood or Composite)
30%
Frost-safe footings (1.2m depth) and joists
18%
City of London building permits and plans
4%
Excavation and landscaping restoration
3%
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
$16,554
Today
$17,630
Deck Building in London is ↑ 6.5% compared to roughly a year ago — about $1,076 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 N6E 2Z9, Canada
75 reviews
Decks by Premier Ltd. - London
341 Talbot St Unit 352, London, ON N6A 2R5, Canada
60 reviews
Hickory Dickory Decks - London
37 Cedarwood Crescent, London, ON N6H 5P5, Canada
43 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 more than 24 inches (0.61m) above grade, attached to the house, or has a roof. Fees in London typically range from $200 to $350.
To prevent frost heave, footings must extend below the local frost line, which is 1.2 meters (approx. 48 inches) in Southern Ontario.
Pressure-treated wood costs $35–$45 per sq. ft. installed, while composite ranges from $55–$75 per sq. ft. Composite has a higher upfront cost but saves $300–$700 in maintenance every 2–3 years.
A standard 200–400 sq. ft. deck in London takes 1 to 3 weeks to build, depending on design complexity and permit approval times (usually 10 business days).
📊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: 3 days 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.