Decks, gazebos, pergolas and privacy screens engineered for Ontario winters.
- Design & quote
- 3 — 7 days
- Permit review
- 2 — 6 weeks
- Standard deck build
- 1 — 2 weeks
- Deck + gazebo
- 2 — 4 weeks
Deck & Gazebo in Oshawa — the short answer
Deck and gazebo construction covers the design, permitting and building of raised or grade-level outdoor structures — including footings below the frost line, pressure-treated framing, and pressure-treated, cedar, composite or PVC decking. In the GTA in 2026, professionally built decks cost roughly $30 to $50 per square foot in pressure-treated lumber, $50 to $75 in cedar, $65 to $90 in composite, and $80 to $110 in PVC. In Oshawa, deck permits are issued by City of Oshawa Building Services, and a permit is generally required once a deck is attached to the house or sits more than 600 mm above grade.
What we can build in a Oshawa backyard is set by grade, lot width and what the house can carry. Central and south Oshawa hold 1920s to 1960s homes — smaller, more affordable, and frequently in need of electrical and plumbing updates alongside the visible renovation. Taunton, Windfields and Kedron are 2005 onward with modern framing and tall basements. The two halves need completely different scopes of work.
Proximity to Ontario Tech and Durham College supports year-round rental demand, which is why second suites are the most common project we are asked about in Oshawa.
Permits — City of Oshawa Building Services
Oshawa permits additional dwelling units subject to building permit and registration. Older central Oshawa basements often need ceiling height verified and electrical service assessed before a legal suite is viable, and both are things we check on the first visit.
Deck & Gazebo pricing
- Pressure-treated deck$30 — $50 / sq ft
- Cedar deck$50 — $75 / sq ft
- Composite deck$65 — $90 / sq ft
- PVC deck$80 — $110 / sq ft
- Gazebo or pergola$12,000 — $38,000
A 200 sq ft pressure-treated deck typically lands near $8,000; the same deck in composite with glass railing is $20,000 or more. Helical piles instead of poured footings add roughly $350 to $600 per pile.
Neighbourhoods
Windfields · Taunton · Kedron · Central Oshawa · Donevan · Lakeview · Eastdale · McLaughlin · Samac
These apply to every deck & gazebo project in Oshawa. City of Oshawa Building Services is the final authority and we confirm each item against your specific property before quoting.
Multi-level & wrap-around decks
Engineered framing, stair runs with code-compliant rise and run, and level changes that follow your grade instead of fighting it.
Gazebos & pergolas
Freestanding and attached structures with post bases above grade, hardware-connected beams, shingled or louvred roofs, and screening options.
Composite & PVC decking
Trex, TimberTech and PVC systems installed with hidden fasteners, breather gaps, and picture-frame borders that cover the cut ends.
Cedar & pressure-treated builds
Kiln-dried cedar and PT framing with joist tape, hot-dip galvanised hardware and a first coat of sealer before we hand it over.
Railings & glass panels
Aluminium, glass, cable and wood railings at code height, with posts through-bolted to the frame rather than face-screwed to the rim.
Privacy screens & outdoor rooms
Slatted privacy walls, under-deck storage, integrated benches and planters, low-voltage stair and post lighting.
Not seeing your question? Call or text (647) 928-3544 — we answer same day, usually within 2 hours.
City of Oshawa Building Services handles permits for Oshawa. Oshawa permits additional dwelling units subject to building permit and registration. Older central Oshawa basements often need ceiling height verified and electrical service assessed before a legal suite is viable, and both are things we check on the first visit. We prepare the drawings, submit the application, respond to plan-review comments and call every inspection through to a closed permit, so you are not standing in a queue at City Hall.
We come to you in Oshawa, measure on site, and hand back a written line-by-line quote at no cost. Same day, usually within 2 hours response.
Same day, usually within 2 hours· Serving the GTA, Hamilton, Guelph & Kitchener