What a Cedar Deck Actually Costs in BC (2026): The Full Materials Math Versus Leading Retailer

Search "how much does a cedar deck cost" and you'll get contractor quotes of $40–80+ per square foot with no explanation of where that number comes from. Here's the part nobody breaks down: the wood itself is a fraction of that. As a Surrey lumber yard, we can show you the actual materials math, board by board, using our shelf prices as of July 2026 — and how those prices stack up against a major BC home improvement retailer. (Fencing your yard instead? We did the same exercise in How Much Does a Cedar Fence Cost in BC in 2026? — and our Materials Calculator runs both sets of numbers for your exact dimensions.)

What Makes Up the Cost of a Deck? Surface vs. Structure

The surface is the decking you walk on. The structure is everything underneath — posts, beams, and joists. They get priced very differently, so we'll do them separately, then put it all together on a real example: a 12' x 12' (144 sq ft) ground-level deck.

How Much Does Decking Material Cost Per Board?

You have three good options at our yard, all priced per board:

Alaskan Yellow Cedar 5/4x6 decking — $15 per 12-foot board. This is the premium decking species in BC: dense, naturally rot-resistant, and it wears beautifully. With standard gapping, figure about 2.2 boards of coverage per square foot of width — a 12x12 deck takes roughly 26 twelve-footers. That's $390, or about $2.70 per square foot.

Japanese Cedar (Sugi) 5/4x6 — also $15 per 12-foot board right now, so the same $2.70/sq ft. Sugi is lighter and softer than yellow cedar; it's a great value pick for lower-traffic decks.

Western Red Cedar 2x6 — $21 per 12-foot board, about $3.80 per square foot. The thicker board feels more solid underfoot, spans joists spaced further apart, and gives you the classic red cedar look.

For perspective: a major BC home improvement retailer lists Western Red Cedar 5/4x6x12 decking at $28.48 per board. Our yellow cedar — a denser, more rot-resistant species — is $15. That's a premium species for nearly half the price of their standard board.

How Much Does the Deck Structure (Posts, Beams, Joists) Cost?

For our 12x12 example, framed with joists at 16" on centre:

A note on the substructure: plenty of builders frame in pressure-treated to save money, and that's a legitimate choice — but if the deck is where your kids and pets spend the summer, there are reasons to keep it all natural wood. We covered that in Cedar vs. Pressure-Treated Wood: Understanding the Health Implications, and the structural choices in more depth in Building from the Ground Up.

How Much Do You Save Buying From a Lumber Yard vs. a Big-Box Store?

Here's the same 12x12 materials list — decking, joists, and beams — priced against a major BC home improvement retailer's listed prices for comparable cedar lumber:

Nearly $900 saved on one modest deck — and where the species differ in that table, it's because our lower-priced option is yellow cedar, which is generally regarded as the more durable wood. On a bigger deck, the gap only widens: at these prices, a 300 sq ft deck saves roughly $1,800 in lumber.

What Does a 12x12 Deck Cost in Total?

So a real cedar deck — not composite, not pressure-treated, actual cedar top to bottom — costs $7–9 per square foot in materials. Compare that to installed quotes and you can see exactly what you're paying for labour, and exactly how much a DIY build saves.

How Do You Size Materials for Your Own Deck?

The fastest route: enter your deck's width and length in our Fence & Deck Materials Calculator and get the full itemized list with GST. Or use the quick formula for any rectangular deck:

1. Decking: square footage × $2.70 (5/4x6 yellow cedar or Sugi) or × $3.80 (WRC 2x6)
2. Structure: roughly $3.25 per square foot for a ground-level build like the one above
3. Hardware and footings: budget $1.25–1.50 per square foot

Raised decks, stairs, and railings add to that — railings especially, which deserve their own post.

Where Can You Buy the Boards in This Post?

Every price above is our live, listed price — click through and check:

• Yellow Cedar 5/4x6 decking
• Japanese Cedar (Sugi) 5/4 decking
• Western Red Cedar 2-inch planks (2x6 decking and joists)
• Yellow Cedar 2-inch STK planks (joists and beams)
• Hemlock 4x4 and 6x6 posts

Volume discounts apply on larger orders — a full deck package usually qualifies. And if a fence is next on the list, start with our cedar fence cost breakdown or jump straight to the calculator.

Frequently Asked Questions

How much does a cedar deck cost per square foot in BC?

For materials only, a full cedar deck — decking, structure, and hardware — runs about $7–9 per square foot, as shown in the 12x12 breakdown above. Installed labour typically adds significantly more on top of materials.

Is yellow cedar or western red cedar better for decking?

Yellow cedar is denser and more rot-resistant, and at our yard it's actually priced lower than Western Red Cedar 2x6 decking — making it the stronger value pick for most decks.

How many deck boards do I need for a 12x12 deck?

With standard gapping, a 12x12 deck takes about 26 twelve-foot 5/4x6 boards. Use our Materials Calculator for your exact dimensions.

Do I need a permit to build a deck in BC?

Permit requirements vary by municipality, so check with your local building department before starting — this matters especially for elevated decks.

*Comparison prices are the regular listed prices for comparable cedar dimensional lumber on the website of a major BC home improvement retailer, verified July 13, 2026. Where species differ, the table notes it; grades, finishes, and actual dimensions may vary between retailers, and competitor prices are subject to change. Our prices are current as of July 2026 and subject to change; GST not included. Visit us at 4748 152 St, Surrey, or shop online at williamscedar.ca.