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 providersReshape Consulting Inc.
50 Pippy Pl Unit 11, St. John's, NL A1B 4H7, Canada
25 reviews
Core Contracting Inc
1247a Kenmount Rd, Paradise, NL A1L 0V8, Canada
12 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: today. Updates run weekly. All costs in CAD.