Costs
Deck Building Cost in Calgary
Updated 2 min read
The short answer
In Calgary, a pressure-treated wood deck typically costs $30–$50 per square foot installed. Composite decking runs $50–$80 per square foot. A 12×16-foot pressure-treated deck (roughly 192 sq ft) lands around $6,000–$10,000. The same footprint in composite runs $10,000–$15,000. A second-storey deck with stairs and a railing system adds 30–50% to the base price.
Material costs per square foot (installed)
| Material | Cost/sq ft | Lifespan | Maintenance | Best for |
|---|---|---|---|---|
| Pressure-treated pine | $30–$50 | 15–20 years | Stain every 2–3 years | Budget-conscious, utility decks |
| Cedar | $45–$65 | 20–25 years | Stain every 2–3 years | Natural look, moderate budget |
| Composite (Trex, TimberTech) | $50–$80 | 25–30+ years | Annual wash only | Low maintenance, family use |
| PVC deck boards | $60–$90 | 25–30+ years | Annual wash only | Maximum weather resistance |
| Ipe or hardwood | $70–$110 | 30–40 years | Oil annually | Premium natural look |
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Size and configuration impact
- Ground-level vs elevated
- A ground-level deck (under 600mm above grade) requires simpler footings and no railing. A second-storey deck requires engineered footings, a railing system, stairs, and often structural posts through the house wall. The price difference is substantial.
- Stairs
- Each stair flight adds $1,500–$4,000 depending on height and material. A short 3-step transition is modest; a full staircase from a second-storey deck to the yard is a significant line item.
- Railing
- Railing is priced per linear foot. Wood railing runs $30–$60/lin ft. Metal baluster systems run $50–$90/lin ft. Glass panel railing runs $100–$200/lin ft. On a 40-linear-foot deck, railing alone can range from $1,200 to $8,000.
- Footings
- Calgary requires frost-depth footings (typically 1.2m / 4 feet deep). Concrete sono-tubes are standard. Rocky or clay soil can increase excavation time and cost. Helical piles are an alternative for difficult sites.
- Accessories
- Built-in seating, planters, lighting, pergolas and privacy screens add cost but also add function. Plan for these from the start — retrofitting them later means tearing into finished decking.
Answers
Frequently asked questions
- Is composite decking worth the extra cost over wood?
- For most homeowners, yes. Composite eliminates staining, resists rot and insect damage, and maintains its appearance with minimal effort. Over 15–20 years, the maintenance savings often offset the initial price premium. Wood wins on upfront cost and for those who prefer the natural look and are willing to maintain it.
- How long does it take to build a deck?
- A simple ground-level pressure-treated deck takes 2–4 days on site. An elevated composite deck with stairs and railing takes 5–10 days. Add 1–2 weeks for fabrication and permit processing before construction begins.
- Do I need to stain a new pressure-treated deck immediately?
- No. New pressure-treated wood needs 3–6 months to dry and lose its green tint before it accepts stain properly. Sealing the end grains immediately is good practice, but full staining should wait until the wood has acclimated.
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