How much does a deck cost in 2026?

National median is $30–$60 per sq ft installed for pressure-treated wood, $50–$90 for mid-range composite, and $90–$140 for premium composite or tropical hardwood. A typical 16×20 (320 sq ft) deck runs $9,600–$28,800 depending on tier, with mid-range composite landing around $18,000. Add 10–20% in high-cost coastal markets (Northeast, California, Pacific Northwest).

What's included in the cost estimate?

Materials (decking, framing, fasteners, hardware), labor (regional rate), railing if selected, stairs if selected, demolition if existing deck, permit, optional design fees, optional integrated lighting, and a 10% contingency reserve. Not included: landscape repair, electrical sub-panel work, gas-line relocation, or any structural work to the house itself.

Why is composite so much more expensive than wood up front?

Composite decking is 2-3× the per-linear-foot cost of pressure-treated lumber, and the install requires hidden-fastener clip systems that take 25-30% longer than face-screwing wood. But composite eliminates ~$0.45/sqft/year in stain and seal costs. Over a 25-year ownership horizon, mid-tier composite typically beats PT lumber on total cost of ownership (TCO). See our Composite vs Wood Comparison calculator for the math.

How much can I save by building the deck myself?

Materials are typically 40-50% of a contractor's installed price, so a competent DIYer with a weekend and basic carpentry tools can save 50-60% of total project cost. Expect 1.0–2.0 hours per sq ft depending on material — composite hidden-fastener systems are slower than face-screwed PT. Be realistic about skill level: budget PT is moderate difficulty, premium composite is advanced, and exotic Ipe pre-drilling is expert-level work.

Do I need a building permit?

In most US jurisdictions, yes — if the deck is over 30 inches above grade, attached to the house, or larger than 200 sq ft, a permit is required by IRC 2021. Permit fees range from $140 (suburban Midwest) to $320+ (Boston/NYC suburban). Some jurisdictions also require a separate electrical permit for integrated lighting. Always call your local building department before breaking ground — permits are cheap, post-construction violations are expensive.

What's the cheapest way to build a deck?

Pressure-treated pine, rectangular shape, ground-level (under 24″, no railing required), no stairs, easy site access, no permit fee in your jurisdiction, and DIY install. That combination lands around $15-25/sqft total for materials plus your time. Add a railing or 4 stairs and you're looking at $25-35/sqft. For a first-time DIYer, factor in $200-400 in tools you don't already own.

Why does deck cost vary so much by state?

Labor rate is the biggest variable. A licensed deck carpenter in Boston or San Francisco runs $85-110/hr; the same role in suburban Tennessee or Oklahoma is $45-60/hr. The calculator applies regional multipliers from RSMeans 2026-Q1 indices: Northeast 1.22×, West 1.28×, Midwest 1.00×, South 0.92×. Materials are roughly national — the 30%+ spread comes from labor, permit fees, and demolition pricing.

What's a contingency reserve and why is it 10%?

Contingency is a budget line you set aside for unforeseen scope: rotted house framing exposed when removing the old ledger, a buried utility line that requires rerouting, mid-project upgrades the homeowner wants. 10% is the industry-standard reserve for a residential deck — for new construction it can drop to 7%, for full demo-and-rebuild it should be 15%. Better to have it and not need it than the reverse.

How does the financing estimate work?

The calculator uses a standard PMT amortization at 7.99% APR over 60 months — typical terms for a home-improvement personal loan in 2026. Your actual rate depends on credit score, lender, and whether you secure the loan against home equity. HELOC rates are typically 1-2% lower; credit-card financing is much higher (often 18-24%). Always shop at least 3 lenders.

Should I include design fees?

If your deck is a stock rectangle attached to a typical home, no — most contractors include a basic design in their quote. Include design fees ($500-1,500) if you want a multi-tier deck, custom railing, an outdoor kitchen integration, a pergola, or a wraparound that changes elevation. Architects charge a flat fee or 10-15% of project cost; design-build deck contractors often roll it into labor.

Why doesn't the calculator include landscape repair?

Landscape repair (re-sodding the work zone, replacing damaged plants, regrading drainage) varies wildly by yard. Budget $500-2,500 separately depending on how much heavy equipment crossed the yard during framing. Some contractors include light cleanup; full landscape restoration is typically a separate trade.

Is this calculator updated for 2026 lumber prices?

Yes — the calculator pulls from 2026-Q1 national-average retail data (Home Depot, Lowe's, specialty distributors). Lumber prices have stabilized after the 2020-2024 volatility. We monitor price indices monthly and refresh this calculator quarterly. If you're reading this 6+ months after the last update, expect ±5-8% drift in the materials line item.

Can I export this estimate as a PDF?

Yes. Use the action bar above the results — Save PDF generates a clean printable document, Print uses your browser's print-to-PDF, and Copy Link gives you a shareable URL with all your inputs preserved (great for getting contractor quotes or sharing with a spouse). The link is short, no login required, valid forever.

Where can I embed this calculator on my site?

Anywhere. The Embed section on this page generates a one-line script (recommended) or iframe code. It works in WordPress, Webflow, Wix, Squarespace, Ghost, Notion, and any custom site. The widget auto-resizes to fit content and theme-matches the parent site by default. Free up to 1,000 calculations/hour per domain.

Project budget · contractor-grade

Deck Cost Calculator

Q: How accurate is this deck cost estimate?

Within ±15% of an actual contractor quote in most US markets. Expect higher variance for complex sites, custom designs, or post-2026-Q2 lumber-price swings. The calculator uses 2026-Q1 national-median pricing from Home Advisor, Angi, and RSMeans residential indices, with state-specific labor multipliers. For a final permit-ready quote, get 3 contractor bids — this calculator should put you within striking distance of all three.

A complete project budget — materials, labor, permits, demo, design, and contingency — sized to your dimensions, priced at 2026-Q1 contractor rates, and adjusted for your state. 5 finish tiers compared side-by-side.

2026-Q1 pricingAll 50 states5 tiers comparedDIY savings cardFinance estimateFree foreverNo signup

5·Finish tiers

50·States priced

$/sqft·Live update

<2s·Live calc

Inputs

Dimensions

Plan-view length × width.

Lengthft

Widthft

Area · 192 sq ft·Perimeter · 56 ft

Footprint shape1.00× complexity

AttachmentShares house structure

Deck heightinches

IRC R312 requires a 36″ guardrail above 30″.

State2-letter

Material tierinstalled $/sqft band

Stairssteps

Site accessDriveway / wide-open backyard

Scope toggles

Project budget · Northeast

$16,481 – $28,863$86–$150 /sq ft

192 sq ft · Mid composite · 1.22× labor · 1.10× complexity

Materials

Low $4,752

Labor

Low $7,086

Add-ons

Low $4,324

Soft costs

Permit · demo · design

Project advisories · IRC 2021

Guardrail included (deck 36″ off grade)

IRC R312

IRC R312 mandates a 36″ guardrail on open edges when deck height exceeds 30″. 40 lf priced at Mid composite tier.

Building permit included in budget

IRC R105

Northeast typical permit fee is in the budget. Most jurisdictions require a permit for decks > 200 sqft, > 30″ above grade, or attached to the house.

Hidden-fastener install premium baked in

Manufacturer specs

Mid composite uses hidden-fastener clip systems (Cortex / CamoClip / Trex Universal) — labor takes 25–30% longer than face-screwing PT. Already inside the tier's installed $/sqft band.

Cost breakdown

Item

Qty

Total

Labor (Northeast, 1.22× national)

$7,086 – $11,337 (low – high estimate)

1.0 scope

$11,337

Labor (Northeast, 1.22× national)

$7,086 – $11,337 (low – high estimate)

1.0 scope

—

$11,337

Materials (decking + framing + hardware)

$4,752 – $7,603 (low – high estimate)

Home Depot Lowe’s

1.0 scope

$7,603

Materials (decking + framing + hardware)

$4,752 – $7,603 (low – high estimate)

Home Depot Lowe’s

1.0 scope

—

$7,603

Railing (40 lf, ledger 3-side)

$2,684 – $4,636 (low – high estimate)

1.0 scope

$4,636

Railing (40 lf, ledger 3-side)

$2,684 – $4,636 (low – high estimate)

1.0 scope

—

$4,636

Contingency (10% reserve)

$0 – $2,624 (low – high estimate)

1.0 scope

$2,624

Contingency (10% reserve)

$0 – $2,624 (low – high estimate)

1.0 scope

—

$2,624

Stairs (4 steps @ 9.0″ rise)

$1,640 – $2,342 (low – high estimate)

1.0 scope

$2,342

Stairs (4 steps @ 9.0″ rise)

$1,640 – $2,342 (low – high estimate)

1.0 scope

—

$2,342

Building permit (Northeast)

$320 flat

1.0 scope

$320

Building permit (Northeast)

$320 flat

1.0 scope

—

$320

Materials subtotal

$28,862

National-median pricing (2026-Q1). Local prices vary ±15%. Materials line uses Mid composite tier; switch tiers to repaint the budget. Includes 10% contingency reserve on the high estimate.

Live preview

Visualize your deck

Photoreal 3D · plan view · framing breakdown. Color matches your tier selection.

PBR materialsHDR lightingMid composite

Loading 3D scene…

DeckMath·16′ × 12′·192 sq ft

Trex Enhance·composite

Drag · pinch / scroll

Joists

13 × 12′

Beams

2 × 2-ply 2×10

Posts

6 × 6×6

Boards

27 rows

Project all-in

Materials (low – high)

Mid composite tier · Trex Enhance · Fiberon Good Life · TimberTech Prime+. ~$0.05/sqft/yr.

$4,752 – $7,603

Labor (installed)

Northeast · 1.22× national index

$7,086 – $11,337

Add-ons

Railing · stairs · lighting (only included items)

$4,324 – $6,978

Soft costs

Permit · demo · design (only included items)

$320 – $320

Contingency reserve (10%)

Industry-standard cushion for unforeseen scope

$2,624

Project total (low – high)

Plan around the high. Get 3 contractor bids — DeckMath should land within ±15%.

$16,481 – $28,863

Same dimensions, different tier

tap to switch

DIY savings

$14,399

vs mid-range contractor

Materials only: $7,603
Estimated hours: 288 hr
Skill required: advanced

Finance estimate

$599/month

60-month personal loan @ 8.99% APR

Principal: $28,863
Total interest: $7,077
Estimate only — shop 3+ lenders.

Composite/PVC installs use hidden-fastener clip systems — labor is 25–30% slower than face-screwing pressure-treated wood. That premium is already baked into the tier's installed $/sqft band.

Need exact board counts?

The Deck Material Calculator gives you a permit-ready bill of materials — every joist, hanger, fastener, and footing — validated against IRC 2021 span tables.

Open

Estimates use 2026-Q1 national-median pricing (Home Advisor, Angi, RSMeans). Expect ±15% variance vs your local market. Always get 3 contractor bids before signing. This calculator is not a substitute for a licensed inspector or structural engineer.

How to use

Three steps. Permit-ready output.

Enter dimensions

Length × width in feet. Pick a shape — rectangular is the cheapest, multi-tier and wraparound add 10–25% in complexity.

Pick your finish tier

Budget PT all the way up to exotic Ipe. Each tier shows installed $/sqft. The tier comparison strip lets you see all 5 priced at your dimensions side-by-side.

Add scope items

Stairs, railing, demo of existing deck, permit, design fees, integrated lighting. Each is a separate line item in the breakdown.

Pick your state

Labor cost varies 30%+ between regions. Northeast (1.22×) and West (1.28×) cost more than Midwest (1.00×) and South (0.92×).

Read your project budget

Low-high range, per-sqft, itemized breakdown, financing estimate, and DIY savings — all live. Save link, export PDF, embed.

Material guide

Wood, composite, or PVC?

Three honest paths. Composite wins the 25-year math for most homeowners, wood wins on upfront cost, and PVC is unbeatable around water. Each card below answers in one glance — recalculate the bill of materials by clicking a brand in the picker above.

Pressure-treated wood

Best for · DIY budget builds

Upfront: $1.85 – $4.10/lf
Lifespan: 10 – 15 years

Pros

Lowest upfront cost ($15–25/sq ft installed)
Universally available — Home Depot, Lowe's, lumberyards
Workable with standard fasteners and tools

Cons

Annual stain/seal needed (~$0.45/sq ft/yr)
Splinters, splits, and warps over time
Higher 25-year ownership cost than composite

Try in calculator: PT 2×6 or 5/4×6 deck boards

Composite

Best for · Most homeowners

Upfront: $3.20 – $6.40/lf
Lifespan: 25 – 30 years (warranty)

Pros

Wash-only maintenance ($0.05/sq ft/yr)
Capped polymer surface resists stains, mold, fade
Lowest 25-year total cost for most builds

Cons

Higher upfront ($28–40/sq ft installed)
Hidden-fastener systems take 25% longer to install
Can run warm in direct sun (lighter colors mitigate)

Try in calculator: Trex Enhance · TimberTech Prime+ · Fiberon Good Life

PVC (capped polymer)

Best for · Pool & coastal decks

Upfront: $4.65 – $7.20/lf
Lifespan: 30+ years (lifetime warranty)

Pros

Zero rot, zero mold — fully synthetic core
Coolest underfoot of the synthetics (mineral-core lines)
Best moisture and salt-spray performance

Cons

Highest upfront cost
Can move slightly more with temperature swings
Color palette narrower than composite

Try in calculator: TimberTech AZEK Vintage · Wolf Serenity

How we calculate

The math, fully transparent.

The Deck Cost Calculator gives you a contractor-grade total project budget — materials, labor, permits, demo, design fees, and a contingency reserve — for any deck size, material tier, and US state. Numbers reflect 2026-Q1 national-median pricing from Home Advisor, Angi, and RSMeans residential indices. Use the tier comparison strip to see exactly what 5 different finish levels cost on your footprint, and the DIY savings card to see how much labor you'd cut by self-installing.

IRC references

IRC 2021 R507 — Decks (full)
IRC 2021 R312 — Guards (railing required when deck > 30″)
IRC 2021 R311.7 — Stairways (rise/run/handrail)
IRC 2021 R507.5 — Footings (frost depth)

Pricing reflects 2026-Q1 national-median data (Home Advisor, Angi, RSMeans residential indices). Labor multipliers from RSMeans regional indices. Always get 3 contractor bids before signing.

Installed cost per sq ft

$/sqft × area × shape × height × site_access

Tier price band is multiplied by the area then uplifted for shape complexity (rect 1.00 → wraparound 1.25), height (≤24″ 1.00 → >96″ 1.40), and site access (easy 1.00 → difficult 1.18).

Labor regional adjustment

labor_local = labor_national × region_mult

Materials use national-retail pricing. Labor is multiplied by the regional index — Northeast 1.22, West 1.28, Midwest 1.00, South 0.92 (RSMeans 2026-Q1).

Add-ons

railing $/lf × perimeter + stairs $/step × count + lighting $/sqft

Each add-on is a separate line item. Railing assumes one long side is the house attachment. Stair price covers stringers + tread + handrail + landing pad.

Contingency reserve

high_estimate × 10%

Industry-standard reserve for unforeseen scope: rotted house framing, hidden utilities, mid-project upgrades. Add this on top of the high estimate, not the low.

Financing payment (PMT)

P × (r × (1+r)^n) / ((1+r)^n − 1)

Standard amortizing loan formula. Defaults: 7.99% APR, 60-month term — typical home-improvement personal loan in 2026.

DIY savings

savings = (low+high)/2 − materials_only

DIY outlay is the materials line item. Savings vs the mid-range contractor estimate — assumes you're already a competent carpenter and own the tools.

Save your plan

Don’t lose this estimate.

Your inputs are preserved in the URL — email it to yourself or copy the link so you can compare with contractor bids later. No account needed.

Frequently asked

Questions, answered.

Embed this calculator

One line. Any site. Free.

Drop the snippet into your contractor site, blog, or marketing page. Theme matches the parent site automatically.

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Deck Material Calculator

Calculate exact decking boards, joists, beams, posts, footings, and fasteners for your deck — IRC 2021 compliant.

Composite Deck Cost Calculator

Trex, TimberTech, Fiberon, Deckorators by line + color. Real installed cost + 25-yr TCO vs pressure-treated. 2026 retail pricing.

Trex Deck Calculator

Trex deck cost + BoM. All 4 lines (Transcend incl. Lineage, Select, Enhance), full palette, TUHF box count, RainEscape, DeckLighting.

Deck Cost Calculator

Inputs

Project advisories · IRC 2021

Guardrail included (deck 36″ off grade)

Building permit included in budget

Hidden-fastener install premium baked in

Cost breakdown

Visualize your deck

Project all-in

Same dimensions, different tier

DIY savings

Finance estimate

Need exact board counts?

Three steps. Permit-ready output.

Enter dimensions

Pick your finish tier

Add scope items

Pick your state

Read your project budget

Wood, composite, or PVC?

Pressure-treated wood

Composite

PVC (capped polymer)

The math, fully transparent.

IRC references

Don’t lose this estimate.

Questions, answered.

One line. Any site. Free.

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Deck Material Calculator

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