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 Ajax — 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 Ajax, deck permits are issued by Town of Ajax 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 Ajax backyard is set by grade, lot width and what the house can carry. Central Ajax holds 1950s and 60s wartime-era housing on compact lots. Nottingham, Applecroft and the north end are 1990s onward with tall basements. The Discovery Bay and lakefront area holds newer executive homes. Poured foundations and modern services are the norm outside the original core.
Ajax lots are generally wider than comparable homes further west, which makes both a separate basement entrance and a substantial deck straightforward to build.
Permits — Town of Ajax Building Services
Ajax permits additional dwelling units subject to building permit and registration. Newer north-end basements typically exceed the ceiling height minimum comfortably, so feasibility usually turns on side-yard width and window well placement rather than height.
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
Pickering Village · Nottingham · Applecroft · Discovery Bay · Central Ajax · Riverside · Southwood
These apply to every deck & gazebo project in Ajax. Town of Ajax 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.
Town of Ajax Building Services handles permits for Ajax. Ajax permits additional dwelling units subject to building permit and registration. Newer north-end basements typically exceed the ceiling height minimum comfortably, so feasibility usually turns on side-yard width and window well placement rather than height. 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 Ajax, 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