How much does deck building & repair cost in Canada?
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Key takeaways
- Most deck building & repair jobs in Canada land between CA$600–CA$32,000 — known locally as deck building and repair.
- Deck permits are municipal in Canada, but the National Building Code (adopted provincially) governs footing depth, guards and stair geometry — guards are mandatory above 60cm. Quebec additionally requires contractors to hold an RBQ licence for this work.
- Prices below are researched national ranges, updated July 2026 — not quotes.
Deck Building & Repair prices by job size in Canada
| Job size | Low | Typical | High |
|---|---|---|---|
| Repair and re-stain Board replacement, railing re-fix, sand and stain | CA$600 | CA$1,800 | CA$3,500 |
| Small deck (12x12 ft) Pressure-treated deck on proper footings with railing | CA$5,000 | CA$9,000 | CA$14,000 |
| Large or composite deck Elevated 300+ sq ft composite deck with stairs and glass or aluminum railing | CA$12,000 | CA$20,000 | CA$32,000 |
Per-unit rates
| Unit | Low | Typical | High |
|---|---|---|---|
| per sq ft (installed, pressure-treated) | CA$35 | CA$55 | CA$85 |
What affects the price
- Job size and scope — bigger or more complex jobs move you up the ranges above.
- Access and condition — hard-to-reach areas, older properties or neglected maintenance add labour time.
- Materials and quality level — where materials are involved, the grade you choose often matters more than labour.
- Urgency — same-day or out-of-hours work usually carries a premium.
- Where you live — large metros in Canada typically run above the national range; smaller towns below it.
How to save
- Get at least three quotes and compare like-for-like scopes, not just totals.
- Be flexible on timing — off-peak slots are often cheaper.
- Bundle related tasks into one visit to spread call-out costs.
- Agree the scope in writing up front to avoid change-order surprises.
How to hire a deck building & repair pro in Canada
- Check municipal permit rules — most Canadian cities require a permit for decks over 60cm (24") above grade or attached to the house
- Confirm the builder carries liability insurance and provincial workers' compensation coverage (WSIB in Ontario, WorkSafeBC in BC)
- Ask for footing depth below the local frost line — typically 1.2m or more in most provinces
- Get the framing plan in writing: joist size and spacing, beam spans, ledger detail
- Ask whether the price includes permit drawings, which some municipalities require
- Compare at least 3 itemized quotes
Red flags
- Proposes surface deck blocks for an elevated or attached deck
- Footings shallower than the local frost line
- Offers to build without a permit where one is required
- Large upfront deposit with no written contract
- No WCB/WSIB clearance certificate
How Handld researches prices
These are researched estimates, not quotes and not our transaction data. We compile ranges from published sources — national statistics, trade bodies and incumbent cost guides — normalise them to CAD, and adjust city pages by a population-based cost tier. Last updated July 2026. Basis: HomeStars cost guides; Canadian municipal permit fee schedules.
Frequently asked questions
Composite vs timber decking — which is cheaper long-term?
Timber is cheaper to install but needs sanding, staining or oiling every 1-3 years. Composite costs 50-100% more upfront but only needs washing. Over 10-15 years the totals often converge, so the decision usually comes down to upfront budget and how much maintenance you will actually do.
Can an old deck be repaired instead of replaced?
If the frame (joists, bearers, posts) is sound, boards and balustrades can be replaced individually and the structure re-stained for a fraction of a rebuild. If posts are rotting at the base or the ledger connection to the house is corroded, replacement is usually safer and not much more expensive than piecemeal repair.
What should a deck quote include?
A complete quote lists demolition/removal of any old structure, footings, framing timber and spans, board type and grade, fixings (hidden vs face-screwed), balustrades, stairs, waste removal, and whether permit fees and engineering are included. Missing line items are where cheap quotes grow.
How much does it cost to build a deck?
Deck cost is driven by area, height off the ground, and material. Ground-level softwood decks are the cheapest; elevated decks need engineered footings and balustrades, and composite or hardwood boards can double the board cost. Most quotes are priced per square metre or square foot, with stairs, balustrades and lighting as line items.
How long does a deck build take?
A simple ground-level deck takes 2-4 days. An elevated deck with footings, stairs and balustrades typically takes 1-2 weeks, plus any permit or inspection lead time before work can start.
How often should a timber deck be stained or oiled?
Every 12-24 months for oil finishes and 2-4 years for film-forming stains, depending on sun exposure. Re-coating on schedule is the single biggest factor in how long the boards last.
How does the Canadian winter affect deck building?
Footings must reach below frost depth (often 1.2m+) to avoid heave, and the build season concentrates in May-October — book in late winter for spring slots. Pressure-treated lumber prices also swing seasonally, so off-season quotes can be cheaper.
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