The cost of a custom deck build—What you’re really paying for
Introduction
A new deck can transform how you enjoy your home, but the final bill often surprises homeowners. We get it. That’s why we believe in breaking down every part of the cost, so you know exactly what you’re investing in. A custom deck build includes far more than just lumber—it’s about design, permits, skilled labor, and the small details that make it safe, functional, and beautiful.
In this post, we’ll walk you through a sample cost breakdown for a 15’ x 20’ custom pressure-treated deck with composite railing—a realistic mid-range project many homeowners ask us about.
Project Example: A Sample Deck Build
This deck included:
Framing and footings with code-compliant hardware.
Pressure-treated joists and beams.
Composite decking boards for durability.
Modern railing system with aluminum balusters.
Built-in steps and skirting for a finished look.
The Detailed Cost Breakdown
Phase 1: Planning, Design & Permits ($4,000)
This upfront phase prevents costly errors and ensures everything is safe and legal.
Site Visit & Consultation: $500 – We assess grading, access, and layout ideas.
Design & Layout Drawings: $1,500 – CAD drawings or renderings to visualize your new deck.
Permitting & Engineering: $2,000 – Includes municipal fees and structural approval for code compliance.
Phase 2: Materials ($11,000)
Material choices drive much of the cost, especially when choosing composite vs. wood.
Pressure-Treated Lumber (framing, beams, joists): $4,000
Composite Decking Boards: $4,500
Railing System (composite/aluminum mix): $2,000
Hardware, Fasteners, Concrete, Misc.: $500
Phase 3: Labor & Installation ($12,000)
Skilled trades ensure the structure is safe, level, and built to last.
Demolition & Site Prep: $1,000 – Removing any existing structure, leveling, and prep.
Framing & Footings: $5,000 – Excavation, concrete footings, ledger installation, and framing.
Decking Installation: $3,000 – Laying boards, staggering seams, hidden fasteners.
Railing & Stairs: $2,000 – Safety-critical elements built to code.
Finishing Touches: $1,000 – Skirting, trim, and cleanup.
Phase 4: Overhead & Contingency ($3,500)
This ensures the project runs smoothly and protects against surprises.
Overhead: $2,500 – Insurance, licensing, equipment, tools, fuel, and project management.
Contingency: $1,000 – For unforeseen conditions like hidden rot or difficult soil.
The Bottom Line: Total Job Cost
$4,000 (Planning & Permits) + $11,000 (Materials) + $12,000 (Labor) + $3,500 (Overhead) = $30,500 Total
Conclusion
By breaking down the costs, we hope to show that a deck is more than just wood and nails—it’s an investment in safety, durability, and enjoyment of your home. Every dollar in your estimate contributes to a finished project that’s built to code, designed to last, and customized for your lifestyle.
Ready to start planning your deck? Contact us today for a detailed, transparent estimate tailored to your space.