Deck Building Cost in Montana (2026)
Deck Building in Montana runs about 1% above the national average. A typical 320 sq ft project starts around $4,850–$8,080 for pressure-treated wood. Estimate your exact project below.
Deck Building Cost Calculator
Adjust the details for an installed-cost range tailored to you.
Length × width of the deck surface. A 16×20 deck is 320 sq ft.
Ballpark estimate for planning — not a quote.
Get your exact price from local deck pros
This is a ballpark — compare up to 3 free, no-obligation quotes from vetted contractors in Montana.
Deck Building cost in Montana by material
Installed cost for a typical 320 sq ft project in Montana.
| Material | Per sq ft | Typical MT project |
|---|---|---|
| Pressure-treated wood | $15.2–$25.3 | $4,850 – $8,080 |
| Cedar / redwood | $25.3–$40.4 | $8,080 – $12,930 |
| Composite (Trex-style) | $30.3–$60.6 | $9,700 – $19,390 |
What affects your Montana cost
- Decking material and railing style
- Height off the ground and stairs
- Footings, framing and permits
- Built-ins (benches, pergola, lighting)
- Local labor rates
Montana deck building — FAQ
How much does deck building cost in Montana?
In Montana, a typical 320 sq ft deck building project runs about $4,850–$8,080 for pressure-treated wood, installed. That's about 1% above the national average. Higher-end materials cost more — use the calculator above for your exact size and material.
How much does deck building cost per sq ft in Montana?
In Montana, installed deck runs about $15.2–$60.6 per sq ft depending on material (pressure-treated wood $15.2–$25.3, cedar / redwood $25.3–$40.4, composite (trex-style) $30.3–$60.6). That's about 1% above the national average.
How much does it cost to build a deck in 2026?
A typical 320 sq ft deck runs about $5,000–$8,000 in pressure-treated wood, or $10,000–$19,000 in composite, installed. Size, height, railings and material drive the price — use the calculator for a localized estimate.
Is composite decking worth it?
Composite costs roughly 1.5–2× wood up front but eliminates staining/sealing and lasts 25–30+ years, so total cost of ownership is often lower. It's the popular choice for homeowners who don't want annual maintenance.