Cost guide

How much does it cost to build a deck in Spokane and Coeur d'Alene?

What a new deck costs per square foot, what changes the price, and what to ask a deck builder before you pick one. National price ranges from published guides, plus how to get quotes from local shops. Free for homeowners.

All cost guides. Prices checked Oct 17, 2026. National ranges, not local prices.

The short answer

HomeGuide's national range for a new deck is $25 to $50 per square foot installed. A 12 by 12 foot deck runs $3,600 to $7,200, and a 20 by 20 foot deck runs $10,000 to $20,000. Replacing an old deck costs $30 to $55 per square foot. These are national ranges, not Spokane or Coeur d'Alene prices.

Deck sizeInstalled cost (national)Source
10 x 12 ft (120 sq ft)$3,000 to $6,000HomeGuide
12 x 16 ft (192 sq ft)$4,800 to $9,600HomeGuide
16 x 16 ft (256 sq ft)$6,400 to $12,800HomeGuide
20 x 20 ft (400 sq ft)$10,000 to $20,000HomeGuide
MaterialInstalled cost per sq ft (national)Source
Pressure-treated pine$25 to $50HomeGuide
Cedar$30 to $47HomeGuide
Composite$40 to $80HomeGuide
Trex composite$45 to $70HomeGuide

What affects the cost

  • Size. The biggest factor. Labor and materials both scale with square feet.
  • Height and design. HomeGuide lists $25 to $30 per square foot for a ground-level deck, $30 to $50 for an elevated deck, and $50 to $60 for a second-story deck. Stairs and railings add cost.
  • Material. Pressure-treated pine costs the least. Composite costs more up front and needs less upkeep.
  • Footings. Footings need to go below the frost line, which matters with our winters.
  • Permit and design. HomeGuide lists $50 to $150 for a permit. Complex decks may need an engineer.
  • Tear-out. Removing an old deck adds labor and disposal.

Questions to ask a shop

  1. What material are you quoting for the decking, and what for the framing?
  2. How deep are the footings, and how will the deck attach to the house?
  3. Are railings, stairs and lighting included?
  4. Will you get the permit, and is the fee in the quote?
  5. Is removing the old deck included?
  6. How long will it take, and when can you start?
  7. What warranty do you give on materials and labor?

Check the shop

In Washington, deck builders must be registered contractors; check them with L&I's Verify a contractor tool. In Idaho, contractors register with DOPL; search the DOPL license search.

Before anyone digs

Utility lines must be marked before digging footings. In Washington and Idaho, you or your contractor can call 811 to request locates.

Get quotes

Tell us the size you want, the height off the ground and the material you like, and add a photo of the spot. You check the job summary first, and nothing goes to shops until you confirm it. Then we invite local shops that fit the job, whether or not they use Doing Work, and you compare the quotes they send. Your phone and email stay private until you pick a shop. See how it works and how we pick shops.

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Free for homeowners.

Common questions

How much does a new deck cost?

HomeGuide lists $25 to $50 per square foot installed. A 12 by 12 foot deck runs $3,600 to $7,200.

Are these Spokane or Coeur d'Alene prices?

No. They are national ranges from HomeGuide. We will only show local price ranges once we have at least 10 real shop quotes for this job in that area from the last 12 months.

Composite or wood?

Composite costs more up front ($40 to $80 per square foot installed in HomeGuide's guide) and needs less upkeep. Pressure-treated wood costs less and needs staining or sealing.

Do I need a permit for a deck?

Many attached or raised decks need one. HomeGuide notes that in many states a small, low, freestanding deck under 200 square feet may not. Check with your city or county, or ask the builder.

What does it cost to use Doing Work?

Nothing. Doing Work is free for homeowners, and shops never pay for leads or to be included.

Related guides

All cost guides

Sources

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