Deck Building Cost in St. John's (2026)
Average cost in St. John's
$8,000 — $20,000
$40 — $100 per sq ft
Cost Breakdown
ItemizedDecking, framing, hardware, and concrete
45%
Professional installation and carpentry
45%
Excavation, frost line footings (1.5m), and demolition
8%
City of St. John's building permits
2%
HST at 15%
📋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
$5,568 — $8,352
Based on 6 sources and market data for St. John's. Actual costs may vary depending on specific project requirements.
🏢Top Deck Build Contractors in St. John's
Verified providersMaclntyre Homes & Renovations
28 Collingwood Crescent, Mount Pearl, NL A1N 5C6, Canada
1 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
In 2026, the average cost ranges from $40 to $100 per square foot, including materials and professional installation. Basic pressure-treated wood decks sit at the lower end ($40-$60), while composite or multi-level decks cost $75-$100+ per sq ft.
Yes, a building permit is required for new decks or structural changes. The City of St. John's charges $8 per square metre for above-grade development, which equates to roughly $0.74 per square foot, with a minimum fee of $50.
Labor costs for deck building in St. John's typically range from $18 to $45 per square foot. This depends on the contractor's experience, the complexity of the design, and site conditions like digging footings below the required 1.5m frost line.
Pressure-treated wood is the most budget-friendly upfront, costing $15 to $30 per square foot for materials. However, due to St. John's wet and harsh climate, many homeowners opt for composite decking ($30-$60 per sq ft for materials) to save on long-term maintenance and weather damage.
📊Our Methodology
How we collect dataAggregated from 6+ 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 days ago. Updates run weekly. All costs in CAD.