Deck Cost Calculator

How Much Does It Cost to Build a Deck in 2026?

A new deck costs $7,000–$20,000 for pressure-treated wood or $15,000–$35,000 for composite, depending on size, material, height, railing type, and regional labor rates.

Building a deck in 2026 costs between $4,500 and $60,000 depending on size, material, and location. A small ground-level pressure-treated pine deck of 150–200 square feet runs $4,500–$7,000 installed. A standard mid-size attached deck of 300–400 square feet with composite decking averages $12,000–$22,000. Large multi-level decks with premium materials, railings, stairs, and a pergola can exceed $50,000.

The national average sits around $15,000–$18,000 for a 400-square-foot composite deck with standard features. The biggest cost drivers are deck size and shape, whether the deck is ground-level or elevated, the decking material selected, add-ons like railings and stairs, and your local labor market. Use the calculator above to get an instant estimate for your specific size, material choice, and geographic location before collecting bids from local contractors.

How Much Does a Deck Cost Per Square Foot?

Deck installation costs $15–$25/sq ft for pressure-treated wood, $25–$60/sq ft for composite, and $30–$70/sq ft for hardwood or PVC — all-in including framing, labor, and basic railings.

Deck cost per square foot is the most useful starting point for comparing materials and estimating budget. In 2026, fully installed cost per square foot by material runs: pressure-treated pine $15–$30, cedar $20–$40, redwood $25–$50, composite (Trex/Azek/TimberTech) $28–$60, hardwood Ipe $35–$75, and PVC/cellular $30–$65. These per-square-foot figures include decking boards, structural framing, footings, fasteners, and professional labor. Labor alone accounts for roughly $8–$15 per square foot.

Railing, stairs, lighting, and a pergola are priced separately and add substantially to the base deck cost. Small decks often cost more per square foot than larger ones because fixed costs — permit, site preparation, footing work, and contractor mobilization — spread over fewer total square feet. Use the calculator above to enter your exact dimensions and see a full cost breakdown across any material you are considering.

What Is the Cheapest Type of Deck to Build?

Pressure-treated pine is the most affordable decking material at $15–$25/sq ft installed, making it the go-to choice for budget-conscious homeowners who want a durable, code-compliant deck.

Pressure-treated pine is the most affordable decking material in 2026, with fully installed costs of $15–$30 per square foot. A 300-square-foot ground-level pressure-treated deck typically runs $4,500–$9,000, making it accessible for most budgets. Pressure-treated lumber is widely stocked at home improvement stores and familiar to every licensed deck builder in the US, which keeps both material and labor costs competitive. The hidden cost to consider: pressure-treated decks require staining or sealing every two to three years to prevent cracking, warping, and graying.

Professional deck staining runs $2–$5 per square foot, adding $600–$1,500 per maintenance cycle on a standard deck. Over a 20-year ownership period, total maintenance can add $3,000–$8,000 to the lifetime cost. For homeowners who want the lowest upfront cost and are willing to maintain the deck consistently, pressure-treated remains the right choice. The calculator above lets you model both materials side by side.

How Much Does a Pressure-Treated Wood Deck Cost?

Pressure-treated pine remains the most popular decking material in the US by installation volume. In 2026, a professionally installed pressure-treated deck costs $15–$30 per square foot for the complete build — framing, decking boards, footings, fasteners, and labor. A standard 300-square-foot ground-level attached deck runs $4,500–$9,000. The same footprint in an elevated two-story configuration costs 20–35% more due to additional structural framing requirements — per American Wood Council span and load guidelines — and safety equipment for elevated work.

These figures do not include railing or stairs — wood railing adds $20–$40 per linear foot, and stairs add $500–$1,500 per flight. The main advantage of pressure-treated beyond upfront cost is universal availability: contractors everywhere work with it, lead times on materials are short, and replacement boards are easy to source years later. The ongoing tradeoff is maintenance — staining every two to three years is essential to maximize lifespan. Use the calculator above to model pressure-treated costs for your exact dimensions.

How Much Does a Composite Deck Cost?

Composite decking — brands like Trex, Azek, and TimberTech — is the fastest-growing deck segment in the US because it combines realistic wood grain aesthetics with near-zero maintenance requirements. In 2026, a professionally installed composite deck costs $28–$60 per square foot, including framing, composite boards, hidden fasteners, and labor. A standard 400-square-foot attached deck with composite decking runs $11,000–$24,000. Elevated composite decks add 20–35% for additional structural framing.

Composite is sold in three tiers: entry-level, mid-range, and capped premium. The cap layer — a protective polymer shell bonded to each board — is what provides scratch, stain, and fade resistance on premium lines. Uncapped composite costs less upfront but is more susceptible to moisture absorption and surface staining over time. Most premium composite products carry 25–30 year warranties. Use the calculator above and select "Composite (Trex/Azek)" to build your estimate by size and location.

Is Composite Decking Worth the Extra Cost?

Yes for most homeowners — composite costs $10,000–$15,000 more upfront than treated wood but requires no staining or sealing and lasts 25–30 years with minimal maintenance, delivering lower lifetime cost.

For most homeowners who plan to stay in their home five or more years, composite decking is worth the upfront premium over pressure-treated wood. The cost gap is real — composite runs $28–$60 per square foot versus $15–$30 for pressure-treated, a 50–100% premium. But composite requires essentially no maintenance: no staining, no sealing, no sanding rough spots, and no annual rot checks. Pressure-treated requires staining or sealing every two to three years at $2–$5 per square foot, adding $3,000–$8,000 over a 20-year period on a standard deck.

Quality composite also carries 25–30 year fade and stain warranties, providing documented performance guarantees that wood cannot match. Composite holds its appearance far better over time and creates stronger resale appeal than a weathered wood deck that needs fresh staining before listing. When maintenance costs are included in the comparison, composite's true lifetime cost often equals or beats pressure-treated. Use the calculator above to compare both materials side by side for your deck size.

How Much Does a Trex Deck Cost?

Trex is the most widely recognized composite decking brand in the US and the market leader by installed volume. In 2026, a Trex composite deck costs $28–$55 per square foot installed depending on the product line and local labor market. Trex Select — the entry-level line — runs $28–$38 per square foot installed. Trex Enhance costs $30–$42 per square foot. Trex Transcend — the flagship line with the most realistic wood grain texture and best heat-dissipation technology — runs $40–$55 per square foot fully installed.

For a standard 400-square-foot attached deck with Trex Transcend, expect to pay $16,000–$22,000 for the deck surface before adding railing, stairs, or extras. Trex products carry a 25-year Limited Residential Warranty covering fade, stain, and structural integrity. Trex is available through most national home improvement retailers and licensed composite deck contractors across the country. Use the calculator above with "Composite (Trex/Azek)" selected to estimate your Trex deck cost by size.

How Big Should My Deck Be?

The right deck size comes down to how you plan to use it, how many people you regularly entertain, and your available yard space and budget. A practical starting guideline: allow 25 square feet per person for comfortable outdoor entertaining. A deck designed for a family of four with occasional guests needs 200–300 square feet minimum to feel uncrowded. For outdoor dining, a 10 × 10 foot section (100 sq ft) fits a standard four-person table with comfortable circulation.

A sectional sofa requires 150–200 square feet. A complete outdoor living space with a dining area, seating zone, and grill station functions best at 400–600 square feet. Most local building codes require setbacks from property lines — typically 5–15 feet — so verify requirements before finalizing dimensions. Use the calculator above to instantly compare costs at different square footages before committing to a final size with your contractor and permit application.

How Much Does It Cost to Build a 12x12 Deck?

A 12 × 12 foot deck equals 144 square feet — compact but practical for a grilling station, bistro seating setup, or small outdoor lounge. In 2026, a ground-level 12 × 12 pressure-treated deck runs $2,500–$4,500 installed, making it one of the most accessible deck builds available. The same 144-square-foot footprint in composite decking costs $4,500–$9,000. Elevated versions at second-story height cost 25–35% more due to additional structural framing.

On small decks like this, contractor minimums and fixed costs — permit fees, site preparation, footing holes — represent a higher percentage of the total than on larger builds, raising the effective per-square-foot cost. Adding railing on three open sides adds $1,500–$3,000 depending on material. A single stair flight adds $600–$1,200. Enter 144 in the square footage field of the calculator above to get a detailed cost estimate for a 12 × 12 deck in your material and location.

How Much Does It Cost to Build a 16x20 Deck?

A 16 × 20 foot deck — 320 square feet — is one of the most popular deck sizes for US homeowners. It comfortably holds a six-person dining set, a seating area, and a grill with easy traffic flow, while remaining manageable to build and budget. In 2026, a 320-square-foot ground-level pressure-treated deck runs $5,500–$10,000 installed. The same footprint in composite decking costs $10,000–$20,000. An elevated version adds 25–35% to either number.

Adding railing on three sides — approximately 52 linear feet — costs $2,500–$5,000 depending on material. Built-in stairs add $700–$1,500 for a standard flight. Permit fees typically run $150–$400 for this size. Total all-in budget for a 16 × 20 composite deck with railing, stairs, and permit in an average US labor market: $14,000–$27,000. Enter 320 in the calculator above to model this exact footprint with your material and location settings.

How Long Does It Take to Build a Deck?

Build time depends primarily on deck size, elevation, material, and complexity. A small ground-level pressure-treated deck of 200 square feet or less typically takes two to three days for a professional two-person crew. A standard 300–400 square foot attached deck with railing and stairs takes four to seven days of active construction. Large or multi-level decks with custom features take one to two weeks. Composite decking adds installation time compared to wood because hidden fastener systems require more precise spacing.

Permitting and inspection requirements add one to two weeks of calendar time on either side of the build — the permit must be approved before construction begins, and a final structural inspection is required before the deck can be used. Weather delays are common; deck contractors need dry conditions for structural fastening and composite installation. Plan for a total project window of three to six weeks from contract signing to final walkthrough when accounting for permitting lead time.

Do I Need a Permit to Build a Deck?

Yes in most jurisdictions — decks over 30 inches above grade, attached to the house, or over 200 sq ft typically require a building permit costing $50–$500 depending on your municipality.

In most US jurisdictions, a permit is required for any deck attached to the house, any freestanding deck elevated more than 18–30 inches above grade, or any deck exceeding 200 square feet. Requirements vary by municipality, so always verify with your local building department before starting work. Permit costs typically run $50–$500 depending on deck size and jurisdiction. The permit process includes a plan review plus on-site inspections — typically a footing inspection before concrete is poured and a final structural inspection before the deck is occupied.

Building without a required permit creates real downstream problems: it can complicate a home sale, may require demolition if discovered by an insurance inspector or appraiser, and voids most manufacturer warranties that require code-compliant installation. Licensed deck contractors — often certified through National Association of Home Builders member programs — handle permit applications and schedule inspections as a standard part of their service — factor permit cost and the approval timeline into your planning from the first day.

How Much Do Deck Railings Cost?

Deck railings are a significant add-on that many homeowners underestimate during initial budget planning. In 2026, installed railing cost by material runs: pressure-treated wood $20–$40 per linear foot; cedar or composite wood rail $35–$60 per linear foot; aluminum balusters and top rail $45–$75 per linear foot; horizontal cable rail (the modern wire-span look) $80–$150 per linear foot; and full glass panel railing $100–$200 per linear foot.

For a standard 400-square-foot deck with approximately 60 linear feet of exposed railing, budget $1,800–$4,500 for wood, $4,200–$7,500 for aluminum, $6,000–$12,000 for cable rail, or $8,000–$16,000 for glass panel. Most local codes require railing on any deck surface more than 30 inches above grade. The railing checkbox in the calculator above includes a standard railing estimate based on typical perimeter for your entered deck size — check it to add railing to your total estimate.

How Much Does It Cost to Add Stairs to a Deck?

Deck stairs are typically priced per flight rather than per square foot. In 2026, a basic flight of pressure-treated stairs — four to six steps with a simple wood handrail — costs $500–$1,200 installed, including stringers, treads, and risers. Composite stair treads to match a composite deck surface add 30–50% to the per-step cost: expect $800–$2,000 for a standard flight. Wide stairs — four feet or wider — or any curved stairway design starts at $2,000 per flight and increases with the custom work involved.

Stairs from an elevated second-story deck require longer stringers, more structural support, and landings on longer runs — typically $2,500–$5,000 or more. Most building codes require a grippable handrail on any stairway with more than two risers. Stair placement affects the deck's structural framing, so deciding location early prevents costly mid-build changes. Check the stair option in the calculator above to include a standard flight estimate in your total.

Does a Deck Add Value to Your Home?

Yes — a well-built deck returns 60–80% of its cost at resale according to Remodeling Magazine's Cost vs. Value report, with composite decks typically recouping more than wood.

Yes — a well-built deck consistently adds measurable value and is one of the top-ranked outdoor projects by real estate professionals. In 2026, deck additions typically return 65–75% of their cost at resale. A $15,000 composite deck adds approximately $9,750–$11,250 in market value. Wood decks at a lower upfront cost return a similar percentage but may underperform if they show weathering and are not freshly maintained at listing time — a deck that needs staining before move-in is a negotiating point for buyers.

Return on investment is highest in warmer climates where decks are usable for more months of the year and are a genuine buyer priority. Decks also photograph well in real estate listings, increasing online click-through and in-person showing volume. A clean, attractive deck signals that the home has been maintained throughout ownership. Use the calculator above to size your investment before deciding on scope and material.

How Much Does Deck Labor Cost Per Square Foot?

Labor is the most variable component of a deck build and the hardest to estimate without local quotes. In 2026, deck installation labor nationally runs $8–$15 per square foot for a standard ground-level attached deck, representing approximately 40–55% of total project cost. Elevated decks at second-story height push labor to $12–$20 per square foot because taller structural framing and safety requirements slow the pace of construction. High-cost labor markets — California, New York, Massachusetts, Hawaii, and Washington — run 25–40% above these national benchmarks.

Low-cost markets in the Southeast and Midwest typically run 15–25% below. Project complexity also matters: irregular deck shapes, multiple levels, tight site access, and intricate railing systems all increase billable hours. Collecting three competing quotes from licensed, insured deck builders in your area reveals the actual local rate and typically shows a 20–35% spread in pricing for identical project scope. Labor market is adjustable in the calculator above.

How Much Does It Cost to Replace Deck Boards?

Replacing deck boards — rather than rebuilding the entire structure — is a practical option when the framing, posts, and joists are structurally sound but the surface boards are cracked, rotted, or visually worn. In 2026, deck board replacement costs $5–$15 per square foot for pressure-treated pine boards plus labor. Composite board replacement runs $15–$35 per square foot installed. For a 300-square-foot deck, board-only replacement costs $1,500–$4,500 for wood or $4,500–$10,500 for composite.

Add $500–$1,500 for old board removal and disposal. Before committing to board replacement only, have a licensed contractor inspect the underlying framing — if joists show rot or structural compromise, a full rebuild is often the more cost-effective path. Mixing new boards with older remaining boards can also create visual inconsistency, particularly with composite decking where dye lot differences between production runs can produce noticeable color variation across the finished surface.

What Is the Difference Between a Deck and a Patio?

The core distinction is construction method and relationship to the ground. A deck is a raised platform built from wood, composite, or other decking materials — framed with structural joists, supported by posts set into footings, and elevated above grade by any amount from a few inches to multiple stories. A patio is a ground-level hardscaped surface — concrete, pavers, natural stone, or brick — installed directly on a compacted base without structural framing.

Decks are the better choice for sloped lots, for attaching to elevated home entries, and for high-traffic outdoor living spaces. Patios generally cost less: concrete patios run $6–$18 per square foot installed, and paver patios $15–$30. Decks offer more elevation flexibility and easier integration with existing door heights. Patios require less ongoing maintenance. Many homeowners combine both — a deck off the main level with a patio below for a two-tier outdoor living space with distinct activity zones.

How Can I Save Money on a Deck Build?

The most effective cost-saving decisions happen before construction starts, at the design stage. Choosing pressure-treated pine over composite saves $13–$30 per square foot upfront — roughly $4,000–$9,000 on a standard 300-square-foot deck. Keeping the deck shape a simple rectangle rather than a polygon or curved design reduces framing complexity and labor hours significantly. Going ground-level instead of elevated eliminates tall structural posts, additional framing members, and the specialized equipment that raises labor cost on elevated builds.

Scheduling your project for fall or winter, when contractor demand is lowest, often yields 10–20% lower bids and faster scheduling. DIYing cosmetic finishing work — staining after construction, adding string lights or planter boxes — keeps hired professional scope focused on the structural work that requires licensing. Getting at least three competing quotes is essential; deck contractor pricing for the same scope regularly varies 25–40% within the same local market. Use the calculator above to set a realistic budget before collecting bids.

How Long Does a Wood Deck Last vs Composite?

Lifespan is one of the most important factors in the true cost-of-ownership comparison between wood and composite. Pressure-treated pine typically lasts 15–20 years before surface boards require replacement, assuming consistent maintenance throughout. Cedar and redwood last 20–30 years with regular sealing and appropriate climate conditions. At end of life, wood decks require complete board replacement or a full structural rebuild. Composite decking lasts 25–30 years or longer — most premium products like Trex Transcend carry 25-year fade and stain warranties and are designed to outlast multiple cycles of pressure-treated wood.

PVC cellular decking lasts a similar 25–30 years. Hardwood Ipe is the longest-lasting option at 40–50 years with minimal maintenance requirements. When evaluating materials, divide the total installed cost by the expected lifespan in years to calculate a true annual cost figure — composite and hardwood frequently win that comparison despite their higher upfront prices. Use the calculator above to compare material costs for your project size.