Deck Building Cost in St. John's (2026)

Yes, a permit is required for all new decks and major modifications. For one- and two-family dwellings, the fee is $8 per square metre for development above grade. A refundable landscaping deposit of $1,000 is also typically required before the permit is issued.

In 2026, the average base salary for a carpenter in St. John's is approximately $25.69 to $27.34 per hour. However, contractor quotes typically bill labor at $45 to $75 per hour to cover overhead, insurance, and specialized equipment.

The city's high moisture and salt air require durable materials. While pressure-treated wood is the most affordable at $35-$60 per sq ft installed, many homeowners opt for composite ($100-$130 per sq ft) to avoid the high maintenance costs associated with Newfoundland's freeze-thaw cycles.

The primary construction season is compressed into June through September. Due to high demand during these months, contractors often charge a premium or require bookings 4-6 months in advance. Building outside this window is difficult due to ground frost and high precipitation.