Complete Ottawa deck-building FAQ hub for 2026: PT vs composite cost analysis, permit thresholds, footing requirements in Leda clay, railing code, and contractor hiring. 14 of the most-asked deck questions answered for Ottawa homeowners.
Deck pricing and material trade-offs. **How much does a deck cost in Ottawa in 2026?** Pressure-treated lumber: $35-$45/sq ft installed. Cedar: $50-$65/sq ft. Composite (Trex, TimberTech): $65-$85/sq ft. PVC (Azek): $85-$110/sq ft. A 16x20 ft deck typically: $14,000-$22,000 for PT, $26,000-$36,000 for composite. **Is composite decking really worth the extra cost in Ottawa?** Total 25-year ownership cost is similar — composite eliminates annual staining/sealing ($400-$800/year for PT) and las...
Ottawa deck permit thresholds. **Do I need a permit to build a deck in Ottawa?** Permits are required for any deck over 10 sq m (107 sq ft) OR over 600mm (24 inches) above grade. Most useful residential decks exceed both thresholds. Permit application: 10-15 business days plan review. **What is the railing requirement for an Ottawa deck?** Decks over 600mm (24 inches) above grade require guards (railings). Guard height: 900mm (36 inches) minimum for decks under 1800mm (6 ft) above grade, 107...
Deck construction in Ottawa. **How long does it take to build a deck in Ottawa?** Contract to completion: 6-14 weeks. Pre-construction: 4-10 weeks (permit, materials, scheduling). On-site work: 3-10 days. Simple 12x16 PT deck: 3-5 days. Composite with railings and stairs: 5-7 days. Multi-level: 8-14 days. **What time of year should I build a deck in Ottawa?** May-June starts for a finished-by-July deck. April starts often hit weather delays. September-October works well for off-season pricin...
Ottawa deck care. **How often should I stain or seal my PT deck in Ottawa?** Initial sealing 6-12 months after install (let lumber dry first), then re-seal every 2-3 years. Use a penetrating oil-based stain or pigmented sealer — film-forming products peel in Ottawa freeze-thaw. Budget $400-$800/year averaged. **Does composite decking get hot in Ottawa summers?** Darker composite colours (espresso, slate) reach 50-60°C (122-140°F) in direct Ottawa sun — uncomfortable for bare feet. Light colo...
Pressure-treated lumber: $35-$45/sq ft installed. Cedar: $50-$65/sq ft. Composite (Trex, TimberTech): $65-$85/sq ft. PVC (Azek): $85-$110/sq ft. A 16x20 ft deck typically: $14,000-$22,000 for PT, $26,000-$36,000 for composite.
Total 25-year ownership cost is similar — composite eliminates annual staining/sealing ($400-$800/year for PT) and lasts 25-30 years vs 15-20 for PT. Aesthetics, lower maintenance, and warranty are the real differentiators. PT remains the budget-conscious choice.
Pressure-treated SPF lumber remains the cheapest at $35-$45/sq ft installed. Cedar adds 30-50% cost. Hidden cost: PT decks require staining/sealing every 2-3 years ($1,500-$3,500 per service) which adds up over the deck's life.
Permits are required for any deck over 10 sq m (107 sq ft) OR over 600mm (24 inches) above grade. Most useful residential decks exceed both thresholds. Permit application: 10-15 business days plan review.
Decks over 600mm (24 inches) above grade require guards (railings). Guard height: 900mm (36 inches) minimum for decks under 1800mm (6 ft) above grade, 1070mm (42 inches) minimum for decks above 1800mm. Maximum 100mm (4 inches) spacing between balusters.