How Much Does a Deck Cost in Ontario?
A new deck in Ontario costs about $45 to $65 per square foot for pressure-treated wood and $65 to $95 per square foot for composite such as Trex or TimberTech. A 12×16 ft (192 sq ft) pressure-treated deck runs roughly $8,600 to $12,500, versus $12,500 to $19,200 for composite. Height, railings, and site conditions move the final number within these ranges.
Deck Cost Per Square Foot by Material
12×16 Deck: Pressure-Treated vs Composite
Estimates include framing, decking, and standard railings. Elevated decks with stairs, glass or aluminum railings, permits, and built-in features increase the total.
Which Decking Is Right for You?
- Pressure-treated — lowest up-front cost; needs staining or sealing every couple of years to stay looking its best.
- Cedar — natural beauty and rot resistance at a mid-range price.
- Composite — highest up-front cost but virtually maintenance-free and the longest lifespan, with a wash-only routine.
See our full deck building and refinishing service, or explore financing options to spread the cost over monthly payments.
Related cost guides
Frequently Asked Questions
How much does a deck cost in Ontario?
A new deck in Ontario costs about $45 to $65 per square foot for pressure-treated wood and $65 to $95 per square foot for composite such as Trex or TimberTech. A 12x16 ft (192 sq ft) pressure-treated deck runs roughly $8,600 to $12,500, versus $12,500 to $19,200 for composite.
Is composite decking worth it versus pressure-treated?
Composite costs more up front ($65 to $95 per square foot versus $45 to $65 for pressure-treated) but needs no staining or sealing and lasts 25 to 50 years, so it often wins on lifetime cost and weekend maintenance time.
How much does a 12x16 deck cost?
A 12x16 ft deck (192 sq ft) costs roughly $8,600 to $12,500 in pressure-treated wood and $12,500 to $19,200 in composite, depending on height, railings, and site conditions.
What makes a deck cost more?
Deck height (stairs and taller framing), railing style (glass or aluminum cost more than wood), footings, and features like built-in benches or lighting all increase the total. Permits and grading also factor in.
Do you build decks across Kitchener-Waterloo?
Yes. D&D Exterior Finishing builds and refinishes decks throughout Kitchener, Waterloo, Cambridge, Guelph, and surrounding areas, with free written estimates.