Utah deck construction costs (2025–2026 Wasatch Front market, fully installed with railing and stairs): pressure-treated wood deck, 200–400 sq ft — $12,000–$22,000; composite decking system at the same size — $18,000–$35,000; elevated second-story or walkout deck — $25,000–$55,000+. Concrete patio — $8,000–$18,000 for standard broom finish; $12,000–$28,000 for stamped. Paver patio with full base preparation — $14,000–$32,000. Pergola additions — $8,000–$22,000. These ranges include frost-depth footings, structural framing to Utah snow load requirements, decking surface, railing system, and stairs. Outdoor kitchen infrastructure, electrical rough-in, and gas line are additional scopes. The wood vs. composite price difference at installation narrows significantly — and reverses — when 20-year maintenance costs are included in the comparison.