Deck Building Cost in Oshawa (2026)
Average cost in Oshawa
$8,000 – $75,000
$35 – $130 per sq ft
In Oshawa, the average is $21,045 and most projects cost between $8,000 and $75,000, or about $35 – $130 per sq ft. Prices are before tax and based on 9 sources.
Cost Breakdown
ItemizedProfessional installation and framing
45%
Decking boards, joists, and hardware
40%
Grading, demolition, and disposal
10%
City of Oshawa fees and drawings
5%
HST at 13%
📋What's Included
ScopeTypically Includes
- Pressure-treated lumber
- Concrete footings
- Railing system
- Stairs (1 set)
- Hardware & fasteners
- Labor
Typically Excludes
- Composite or hardwood decking
- Built-in seating or planters
- Pergola or roof
- Lighting
- Permits
Based on a standard 200 sq ft pressure-treated wood deck.
🧮Estimate your project
LiveYour estimate in Oshawa
Likely range $9,470 – $46,299
- Labor45%$9,470
- Materials40%$8,418
- Site Preparation & Waste10%$2,105
- Permits & Design5%$1,052
Pressure-treated Wood
$21,045
Cedar
$28,600
Composite
$36,155
Hardwood (Ipe)
$49,376
Calibrated to 9 researched sources for Oshawa. Before tax. Real quotes vary with site conditions.
📈Price Momentum
Year-over-year~1 year ago
$20,197
Today
$21,045
Deck Building in Oshawa is ↑ 4.2% compared to roughly a year ago — about $848 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Deck Build Contractors in Oshawa
Verified providersBlacklight Renovation of Oshawa
1320 Mary St N, Oshawa, ON L1G 6Y9, Canada
30 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Yes, a permit is required if the deck is more than 600 mm (24 inches) above the adjacent finished grade at any point, or if it has a roof. Even if a permit isn't required, the deck must comply with the Oshawa Zoning By-law regarding setbacks.
Permit fees typically range from $198 to $600 CAD, depending on the square footage. Note that the City of Oshawa implemented a 3% fee increase effective January 1, 2026.
Pressure-treated wood decks average $35–$55 per sq ft installed, while mid-to-premium composite decks (like Trex or TimberTech) range from $65–$95 per sq ft. A standard 200 sq ft composite deck typically costs $13,000–$19,000 compared to $7,000–$11,000 for wood.
In most residential zones, an uncovered deck must maintain a minimum 0.6 m (approx. 2 ft) setback from the rear property line and must meet the specific side yard setbacks for your property's zoning designation.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 1 months ago. Updates run weekly. All costs in CAD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.