Deck building cost in St. Catharines, ON (2026)
Estimated range · ~300 sq ft pressure-treated deck · before GST/HST
Cost range
| Tier | Estimated cost |
|---|---|
| Budget | $8,750 |
| Typical (midpoint) | $13,125 |
| Premium | $17,500 |
Modeled range, not a quote. City factor 0.974 (below the national baseline). How we calculate this.
What drives the price
- Size and scope of the job
- Material grade
- Access and site conditions
- Permits, disposal and seasonal demand
St. Catharines notes
ON construction workers averaged $38.43/hr in 2025 (StatCan Table 14-10-0064-01), 101% of the Canadian average. The StatCan construction price index for Ontario stood at 106.2 in April 2026 (2023=100). Check St. Catharines permit requirements before starting.
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FAQ
How much does deck building cost in St. Catharines?
Our modeled estimate for ~300 sq ft pressure-treated deck in St. Catharines, ON is $8,750–$17,500 before tax.
Why is St. Catharines below the national average?
Local construction wages in ON (StatCan LFS) and the construction price index for Ontario (StatCan BCPI, 106.2) give a city factor of 0.974.
Are these quotes?
No. They are modeled ranges for planning. Get at least 3 written quotes from licensed local contractors.
Deck building cost in other cities
Toronto · Montréal · Vancouver · Calgary · Edmonton · Ottawa · Winnipeg · Québec City
Other projects in St. Catharines
Roof replacement · Furnace replacement · Hot water tank replacement · Window replacement · Fence installation · Basement finishing · Bathroom renovation · Siding replacement · Driveway paving