How much will your deck cost?
Pick your project, size, decking and railing to see a 2026 price range for the Seattle area. Replacing just the boards on a solid frame? That is an option too.
What changes the cost of a deck around Seattle
Size and shape
Square footage drives most of the cost. Simple rectangles cost less per foot than wraparounds, angles or multiple levels.
New frame or existing frame
Framing is roughly a third of a new deck. If your joists, beams and ledger are sound, new boards on the old frame can save thousands.
Decking material
Pressure-treated wood is the budget choice. Composite and PVC cost more up front but skip the washing, sealing and splinters for decades.
Height and access
Second-story decks need larger posts, beams and footings, scaffolding and often engineered drawings. Tight side yards add labor.
Railing style
Wood and composite rails are the most affordable. Aluminum, cable and glass cost more per foot but keep the view open.
Hidden damage
Rotted ledgers, posts set in concrete and missing flashing are common under older decks here. We price those only after we see them.
Can you keep your old deck frame?
Keep the frame, replace the boards
- Joists and beams are firm when you probe them with a screwdriver
- The ledger is bolted to the house, not just nailed
- Posts sit on raised metal bases, not buried in soil or concrete
- No sagging, bouncing or leaning railings
- Joist spacing fits your new boards (often 16 inches or less for composite)
Time for a new frame
- Soft or crumbling wood at the ledger, joist ends or post bases
- The deck bounces, sways or pulls away from the house
- Old nails-only ledger with no flashing behind it
- Rust-stained or failing hangers and fasteners
- You want a new size, shape or height anyway
Not sure which one you have? Pick “Not sure” in the calculator. At the free inspection we probe every joist, the ledger and the posts, and show you photos before you decide.
Decking materials for our wet climate
| Decking | Typical life here | Care it needs | Feel and look |
|---|---|---|---|
| Pressure-treated pine | About 15 years, more with regular care | Wash and seal every 2–3 years | Classic wood that weathers to grey |
| Cedar | Around 15–20 years with care | Clean and re-stain every 2–3 years | Warm color, soft natural grain |
| Composite | 25 years or more | Rinse and wash a couple of times a year | Wood-look boards, no splinters |
| PVC | 30 years or more | Rinse and wash a couple of times a year | Light, cool underfoot, resists stains |
Deck cost questions
How accurate is this deck cost calculator?
Can I keep my old frame and just replace the boards?
Is composite worth the extra cost here?
Do I need a permit for a new deck?
Learn more about each deck project
Tell us what needs repair. We usually reply the same day.
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Get a free on-site estimate
We inspect the damage, show you photos and give you a written price before any work starts.