Deck Building Cost in London (2026)
Average cost in London
$10,000 — $50,000
$35 — $130 per sq ft
Cost Breakdown
ItemizedProfessional installation and framing
50%
Lumber, composite boards, and fasteners
40%
City of London building permits
5%
Demolition and ground leveling
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
$24,916
Today
$25,963
Deck Building in London is ↑ 4.2% compared to roughly a year ago — about $1,046 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 Suite 324, London, ON N6L 1A3, Canada
73 reviews
Naklo Fence and Deck
6108 Colonel Talbot Rd Unit 1, London, ON N6P 1J1, Canada
77 reviews
Grandview Contractors Ltd.
6496 Heathwoods Ave, London, ON N6P 0J7, Canada
63 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 (0.6m) above grade, attached to the house, or larger than 100 square feet. Even if exempt from a permit, you must still follow zoning bylaws regarding setbacks.
Permit fees are typically calculated at $8.50 to $12.00 per $1,000 of construction value. For a standard $25,000 deck, expect to pay approximately $212 to $300, though the city's minimum permit fee is roughly $260.37 for 2026.
Pressure-treated wood decks typically cost $35–$60 per sq ft installed, while composite options like Trex range from $75–$130 per sq ft. While composite is roughly 2x the upfront cost, it saves $300–$800 annually in maintenance fees.
The City of London Building Division typically takes 3 to 10 weeks for permit review. However, projects using standardized CMHC catalogue designs may be eligible for an expedited 10-business-day review.
📊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: 4 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.