How Much Does It Cost to Build a Deck?

Building a deck typically costs $13,500–$18,500 for a standard 16×20 ft (320 sq ft) capped-composite deck, installed, at 2026 national-average prices. A basic pressure-treated wood deck of the same size runs roughly $9,800–$13,500, while a premium ipe hardwood or PVC deck can reach $19,000–$26,000. Those ranges include framing, concrete footings, railing, stairs, labor, permits, disposal, sales tax, and a 10% contingency.

This guide breaks down deck costs by size and material, explains what the price includes, what drives it up or down, and what quotes most often leave out. It is written for a homeowner hiring a contractor for a ground-level or raised deck. For a number based on your own deck size, material, and city, use the deck cost calculator.

Cost at a glance

Material choice moves the number more than size does. These per-square-foot ranges cover the whole project, not just the decking boards:

Ranges are national averages with labor, permits, disposal, sales tax, and a 10% contingency included. Labor rates in your metro can move them 10–40% either way; see how we calculate costs.

What's included in the price

A full deck quote covers six main line items:

• Framing, beams, and joists. The structure under the boards — usually pressure-treated lumber even under a composite surface. On a typical deck this is about a quarter of the total.
• Concrete pier footings. Poured below the frost line to carry the deck's weight and keep it from heaving in winter. Depth is set by local code (often 36–42 inches).
• Decking surface boards. The visible walking surface: pressure-treated wood, capped composite with hidden fastener clips, or premium hardwood/PVC. This is the single biggest variable.
• Railing and baluster system. Guardrails are required by code on any deck more than 30 inches off the ground. Cable, composite, and metal balusters cost noticeably more than plain wood balusters.
• Stairs and stringers. Each stair run adds labor and materials; wide or multi-flight stairs add more.
• Old deck demolition and hauling. If a deck is already there, tearing it out and disposing of the debris adds a line item most homeowners forget until they see the quote.

Composite finishes bundle hidden-fastener hardware into the price; wood decks use screws or nails. Premium quotes may also include a drink rail, built-in bench seating, or integrated LED stair lighting.

What drives the cost up or down

Material choice. This is the biggest lever. Pressure-treated pine is the cheapest installed option but needs staining every 2–3 years. Capped composite costs about a third more up front but skips the staining and usually lasts 25–30 years. Ipe and premium PVC sit at the top for durability and look — and price.

Deck height and stairs. A low, ground-level deck needs short footings and may not need a railing at all. A raised deck or one with two stair runs needs taller posts, guardrails on all exposed sides, and more labor — adding thousands to the same square footage. If the material choice is fixed, this is usually the biggest cost driver after it.

Size and layout. Cost per square foot falls slightly as decks get bigger because fixed costs (permits, mobilization, the first stair run) spread over more feet. Multi-level layouts, curved edges, and picture-frame borders raise the labor share sharply: a simple rectangle is the cheapest shape per foot.

Railing style. Plain wood balusters add a modest amount. Metal balusters, cable rail, or composite rail systems can add $40–$75 per linear foot of railing. On a deck with 60 feet of railing, that choice alone can swing the total by several thousand dollars.

Old deck removal and site conditions. Tearing out an old deck and hauling it away typically adds $1,000–$2,500 depending on size and access. Rocky soil or poor access (a backyard only reachable through the house) slows digging and hauling and shows up in labor.

Your metro. Labor is the largest component of any deck quote, and it varies more by region than materials do. The ranges here assume national-average labor; expect 10–40% higher in high-cost coastal metros.

What quotes often leave out

Deck quotes are usually quoted per project, which makes it easy to miss what is not in the number. Before you sign, confirm each quote covers:

• Footing depth to the frost line. The quote should specify the depth (for example, 36 or 42 inches) per your local code. Shallow footings heave and settle, and fixing them later means rebuilding.
• Ledger board flashing and attachment. On a deck attached to the house, the ledger board must be flashed with Z-flashing and fastened to the house's framing with structural screws — not just nails. Ledger failures cause decks to pull away from houses. If flashing is missing from the scope, adding it runs $400–$800.
• Fasteners rated for treated wood. Modern pressure-treated lumber (ACQ) corrodes standard fasteners. Screws and hangers must be 316 stainless steel or approved coated types — this is a code requirement, not an upgrade.
• Permits and inspections. Most cities require a building permit for a deck, with a footing inspection before concrete and a final inspection after. Confirm whose name is on the permit: the contractor's, not yours.
• Under-deck weed barrier and gravel. Without it, weeds grow through and water pools under the deck. This is a $350–$700 line item that rarely appears unless you ask.
• Railing, stairs, and extras, itemized. Some low quotes cover only the platform and price the railing and stairs separately. A side-by-side comparison of composite and wood deck costs shows how the same add-ons change the math on either material.
• Electrical. Deck lighting, outlets, or a ceiling fan under a roof cover need wiring, an outdoor-rated GFCI, and sometimes a dedicated circuit. Integrated stair lighting is a nice extra, but run the conduit while the framing is open — it is far cheaper then.

Paste your quote into the Quote Checker before you sign: it flags missing line items and prices that fall far outside the expected range.

How to save without cutting corners

Keep the design simple. A single-level rectangle with one stair run and standard railing is the cheapest deck per square foot to build. Every jog, angle, and extra stair run adds labor without adding usable space.

Choose pressure-treated wood with your eyes open. It is the cheapest installed option, but budget for stain and maintenance every few years. Over 20 years, a composite deck often costs about the same once you count the upkeep — and it avoids the weekends spent re-staining.

Time the build for the off-season. Contractors are typically busiest in spring and early summer. Late fall and winter bids are often sharper, though weather windows are shorter in cold climates.

Keep what you can. If you already have solid footings and framing in good shape, re-decking (new surface boards and railing on the old frame) costs far less than a full rebuild — but have the frame inspected before committing to that plan.

Get three bids and compare scope, not just price. A bid that is much cheaper than the others usually means something is missing — one-coat stain, no permit, wood balusters where the others priced metal. Line-item comparisons are how you find it.

Do not DIY the structure unless you know the code. Deck failures are real, and most of them are ledger or footing failures on amateur-built decks. If you want to save by doing some work yourself, handle the staining, the under-deck gravel, or the cleanup — and let a licensed contractor do the framing, footings, and ledger attachment.

Permits and timeline

Most cities require a building permit for a deck, and many require two inspections: one for the footings before concrete is poured, and a final inspection when the deck is finished. The permit fee itself is modest (usually a few hundred dollars), but the inspection sequence sets the schedule — your contractor should handle it, and the permit should be in their name.

A realistic timeline: 2–6 weeks for design, HOA approval if you have one, and the permit; then 1–3 weeks of construction for a typical residential deck, weather permitting. Complex layouts, custom railing, or material backorders stretch that out.

Before you commit, plug your size and material into the deck cost calculator to get your own range, then check any contractor quote against it in the Quote Checker. If you are also planning the rest of the backyard, our fence installation cost guide covers the other half of the project.