Overview: Deck Replacement Costs in Ottawa
Replacing a deck in Ottawa represents a significant investment. Prices vary based on deck size, materials, design complexity, and labour rates. On average, Ottawa homeowners spend approximately $12,000 to $40,000 CAD for a complete deck replacement. Smaller pressure-treated wood decks fall at the lower end of this range, while larger premium material builds and custom designs reach the upper end.
Ottawa’s long, snowy winters and fluctuating temperatures demand durable materials and quality installation. Those factors influence price.
Material Costs: How Choices Impact Price
Selecting the right deck material impacts the total cost.
Pressure-Treated Wood: $12,000-$18,000
Pressure-treated wood remains a popular choice due to its lower initial cost. It offers adequate structural performance but requires annual maintenance, including staining, sealing, and repair of cracked boards. In Ottawa, frequent freeze-thaw cycles can accelerate wear and tear.
Cedar Decking: $16,000-$24,000
Cedar resists decay and insect damage. Its appearance complements many homes. Despite better performance than untreated lumber, cedar requires regular oiling to maintain colour and longevity.
Composite Decking: $22,000-$35,000
Composite decking blends wood fibres with recycled plastics. Premium capped composite boards resist moisture, mould, and UV fading. Homeowners avoid annual sanding and sealing. Composite costs more initially but reduces upkeep costs over time. Most quality brands offer 20-30-year warranties.
PVC Decking: $25,000-$38,000
PVC decking contains no wood fibres, so it resists water absorption entirely. It tolerates Ottawa’s wet spring conditions and winter freeze cycles without swelling or splitting. PVC remains one of the most low-maintenance decking options, but comes with a higher upfront cost.
Labour Costs in Ottawa
In Ottawa, professional decking carpenters charge between $50 and $90 per hour CAD, depending on experience and season. Peak months (May through September) see higher rates due to demand. A standard deck replacement takes 3-7 days, while complex builds can take up to two weeks.
Removing the existing deck adds to labour costs. Old deck demolition and disposal range from $1,500-$3,500 depending on size and accessibility.
Size and Design Price Breakdown
Deck size influences the total investment.
- 10 × 12 ft deck: $12,000-$17,000
- 12 × 16 ft deck: $17,000-$25,000
- 16 × 20 ft deck: $25,000-$38,000+
Multi-tier decks, incorporated seating, built-in planters, and custom railings raise costs further.
Structural and Hidden Expenses
Homeowners may face additional costs beyond decking boards and labour.
- Footing replacements: Ottawa’s frost depth often requires deep footings. New concrete piers add $1,500-$4,000.
- Ledger board upgrades: If the deck connects to the house, replacing flashing and ledger attachments may be necessary.
- Building permits: Ottawa deck permits typically cost $200-$600, depending on deck size.
- Stairs and railings: Glass, aluminium, or cable railings cost more than standard timber balusters.
Municipal inspectors check framing, footprint, and structural compliance, so factor permits and inspections into the timeline.
Seasonal Cost Variations
Ottawa’s construction industry has price swings based on the season.
- Summer: High demand; longer wait times; higher rates
- Fall: Slightly lower pricing; good weather for construction
- Winter: Higher labour costs due to slower progress and frozen ground
Booking early and securing written quotes ensures better pricing.
Repair vs Replacement: When to Replace
Minor board damage may justify simple repairs. However, when framing joists, posts, or footings show significant rot or instability, a full replacement offers safer, long-term value.
Older decks built under outdated codes often fail modern requirements. Replacing these enhances safety and resale value.
Return on Investment in Ottawa
A well-built deck improves outdoor living space and home appeal. Real estate agents note that outdoor living features matter to buyers. In Ottawa’s market, homeowners can recoup 60-80% of replacement costs in resale value depending on material quality and design.
Composite and PVC decks often attract higher buyer interest. It’s because of low maintenance.
Choosing the Right Contractor
Select licensed contractors with liability insurance. Ask for references and recent project photos. Confirm the contract specifies:
A clear scope prevents disputes. Professional installation ensures proper joist spacing, flashing, and railing installation.
Conclusion: Budgeting for Your Ottawa Deck Replacement
Expect to invest between $12,000 and $40,000 CAD for a deck replacement in Ottawa, depending on size, materials, design, and structural work required. Timber remains cost-effective upfront but demands ongoing care. Composite and PVC cost more. They deliver lower maintenance and longer life.
Plan, budget realistically, and choose materials best for Ottawa’s challenging climate. A solid deck replacement offers years of enjoyment, higher property value, and a reliable outdoor living space.