Deck Building Cost in Idaho
2026 estimates — composite, pressure-treated, and hardwood
300 sqft composite deck, single level, Idaho labor rates. Updated June 2026.
Calculate Your Idaho Deck Cost
Deck Cost by Material — Idaho 2026 (300 sqft)
| Material | 300 sqft (ID) | Per sqft |
|---|---|---|
| Pressure-treated lumber | $5,580 | $19/sqft |
| Cedar | $7,533 | $25/sqft |
| Composite (Trex, TimberTech) | $9,765 | $33/sqft |
| Tropical hardwood (Ipe) | $13,392 | $45/sqft |
Installed including framing, hardware, and labor. Idaho rates applied. Railing not included above.
Building a Deck in Idaho — What to Know
1. Idaho Costs vs. National Average
Deck building in Idaho is below the national average (cost index: 0.93×). A 300 sqft composite deck averages $9,765 — composite costs 75% more than pressure-treated but requires virtually no maintenance.
2. Best Deck Material for Idaho
Get permits before building in Idaho — unpermitted decks cause major issues at resale. Get 3 contractor bids — deck pricing varies 20–35% between builders. Composite decking costs more upfront but eliminates annual maintenance costs ($300–$600/year for staining wood).
3. Permits & Requirements in Idaho
Most decks over 30 inches above grade require a building permit in Idaho. Permit costs average $200–$600. Attached decks require structural assessment of the ledger board connection to your home. Always pull permits — unpermitted decks must be disclosed at sale and can require removal.
FAQs — Deck Cost in Idaho
Deck building in Idaho costs $7,905 on average for a 300 sqft composite deck in 2026 — below the national average. Pressure-treated lumber decks run $5,580 for the same size; composite runs $9,765.
In Idaho, composite decking (Trex, TimberTech) costs $9,765 vs $5,580 for pressure-treated wood for 300 sqft. Composite has a 25–50 year warranty and requires no annual staining ($300–$600/year for wood). Most Idaho homeowners choose composite for its long-term value.
Most Idaho municipalities require permits for decks over 30 inches above grade, attached decks regardless of height, and decks over 200 sqft. Permit costs range $200–$800. Always pull permits — unpermitted construction must be disclosed at home sale and can result in forced removal.
Deck railing adds $1,500–$4,500 for a typical 60 linear foot deck in Idaho. Pressure-treated railing runs $1,395 installed; composite railing $2,232; cable railing $3,348. Aluminum and composite railings require zero maintenance and are often the best long-term value.
Deck lifespan varies by material: pressure-treated lumber lasts 15–20 years with annual staining ($300–$600/year); cedar lasts 20–30 years; composite (Trex, TimberTech) lasts 25–50 years with minimal upkeep; tropical hardwood (Ipe) lasts 40–75 years. Idaho's climate and precipitation levels affect how quickly wood degrades — composite is a better investment in states with significant rain or temperature swings.
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Get Free Quotes on AngiIdaho Deck Summary
- →Composite avg: $9,765 / 300 sqft
- →PT lumber: $5,580 / 300 sqft
- →Range: $5,929 – $11,067
- →Cost index: below national avg