Deck Building Cost in Colorado
2026 estimates — composite, pressure-treated, and hardwood
300 sqft composite deck, single level, Colorado labor rates. Updated June 2026.
Calculate Your Colorado Deck Cost
Deck Cost by Material — Colorado 2026 (300 sqft)
| Material | 300 sqft (CO) | Per sqft |
|---|---|---|
| Pressure-treated lumber | $6,720 | $22/sqft |
| Cedar | $9,072 | $30/sqft |
| Composite (Trex, TimberTech) | $11,760 | $39/sqft |
| Tropical hardwood (Ipe) | $16,128 | $54/sqft |
Installed including framing, hardware, and labor. Colorado rates applied. Railing not included above.
Building a Deck in Colorado — What to Know
1. Colorado Costs vs. National Average
Deck building in Colorado is above the national average (cost index: 1.12×). A 300 sqft composite deck averages $11,760 — composite costs 75% more than pressure-treated but requires virtually no maintenance.
2. Best Deck Material for Colorado
Get permits before building in Colorado — 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 Colorado
Most decks over 30 inches above grade require a building permit in Colorado. 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 Colorado
Deck building in Colorado costs $9,520 on average for a 300 sqft composite deck in 2026 — above the national average. Pressure-treated lumber decks run $6,720 for the same size; composite runs $11,760.
In Colorado, composite decking (Trex, TimberTech) costs $11,760 vs $6,720 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 Colorado homeowners choose composite for its long-term value.
Most Colorado 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 Colorado. Pressure-treated railing runs $1,680 installed; composite railing $2,688; cable railing $4,032. 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. Colorado'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 AngiColorado Deck Summary
- →Composite avg: $11,760 / 300 sqft
- →PT lumber: $6,720 / 300 sqft
- →Range: $7,140 – $13,328
- →Cost index: above national avg