Quick Answer: How Much Does a Deck Cost?
Deck construction runs $35-$100 per square foot installed, depending on material. A 12x16 pressure-treated wood deck costs $7,000-$13,000. Composite and PVC run 30-60% more. Labor is typically 50% of total cost. Budget an extra $100-$500 for permits, and plan for a footing inspection before framing starts. The calculator above gives you an itemized breakdown by material, size, railing, and stairs.
Deck Cost by Size - Installed Prices (2026)
Includes materials, labor, railing on three sides, and one stair section. Excludes permits and site prep. Composite adds 30-60% to wood price; PVC adds 40-80%.
| Deck Size | Square Feet | Pressure-Treated | Composite | PVC |
|---|---|---|---|---|
| 10x10 | 100 sf | $3,500 - $6,500 | $4,500 - $8,500 | $5,000 - $10,000 |
| 12x16 | 192 sf | $7,000 - $13,000 | $9,000 - $17,000 | $10,000 - $20,000 |
| 16x20 | 320 sf | $11,000 - $20,000 | $14,000 - $27,000 | $16,000 - $32,000 |
| 20x20 | 400 sf | $14,000 - $26,000 | $18,000 - $34,000 | $20,000 - $40,000 |
| 24x24 | 576 sf | $20,000 - $38,000 | $26,000 - $49,000 | $29,000 - $58,000 |
Deck Building Cost Guide
Material costs, labor rates, and building requirements for residential deck projects in 2026.
How Much Does a Deck Cost in 2026?
A new deck costs $15–$75+ per square foot installed, depending on materials, height, and complexity.
- Pressure-treated wood: $15–$30/sq ft installed
- Cedar/redwood: $25–$45/sq ft installed
- Composite (Trex, TimberTech): $30–$55/sq ft installed
- PVC/cellular: $35–$60/sq ft installed
- Ipe/hardwood: $45–$75+/sq ft installed
A typical 16×20 ft deck (320 sq ft) costs $6,000–$18,000 in pressure-treated wood or $12,000–$25,000+ in composite.
Key Takeaways
- Pressure-treated deck: $15–$30/sq ft installed
- Composite deck: $30–$55/sq ft installed
- 16×20 deck: $6,000–$25,000 depending on material
Deck Material Comparison: Lifespan & Maintenance
Composite decking costs 2× more upfront but requires zero staining and lasts 25–50 years vs. 10–15 years for untreated wood.
- Pressure-treated pine: 10–15 year lifespan, stain every 2–3 years ($0.50–$1.50/sq ft per stain)
- Cedar: 15–20 years, stain every 2–3 years, naturally rot-resistant
- Composite: 25–50 years, no staining, occasional cleaning only
- PVC: 30–50+ years, won't stain/rot/warp, most expensive
Over 20 years, composite costs less than wood when you factor in maintenance, staining, and replacement.
Key Takeaways
- Pressure-treated lifespan: 10–15 years
- Composite lifespan: 25–50 years, zero staining
- Composite cheaper than wood over 20-year lifecycle
Deck Building Requirements & Permits
Decks over 30 inches above grade require a building permit in most jurisdictions, plus railing and ledger board attachment to code.
- Permit fee: $100–$500 for a standard residential deck
- Railing required: When deck surface is 30"+ above grade (36" min height, 42" in some codes)
- Footing depth: Below frost line (12"–48" depending on region)
- Ledger board: Must be lag-bolted to house framing with flashing — #1 failure point
- Joist spacing: 16" OC standard, 12" OC for diagonal decking or composite
Key Takeaways
- Permit required for decks 30"+ above grade
- Railing: 36" min height (42" in some areas)
- Ledger board attachment is the #1 deck failure point
Deck ROI & Home Value Impact
A wood deck recoups about 65–75% of cost at resale, while composite decks recover 60–70%.
- Best ROI: Simple rectangular deck, 200–400 sq ft, with stairs and railing
- Diminishing returns: Multi-level decks, built-in seating, and elaborate features rarely recoup their full cost
- Regional factor: Decks add more value in climates with 6+ months of outdoor weather
Key Takeaways
- Wood deck ROI: 65–75% at resale
- Composite deck ROI: 60–70% at resale
- Best ROI: simple design, 200–400 sq ft
What Gets Left Out of Deck Quotes
These line items are frequently missing from initial bids. Ask about each one before you sign a contract.
- Concrete footings: Each footing runs $150-$400 depending on frost line depth and diameter. A 12x16 deck typically needs 4-6 footings. Some quotes price footings separately after the soil investigation.
- Ledger board replacement: If the existing ledger is undersized, rotted, or improperly flashed, replacing it adds $400-$1,200. Inspectors catch this. Do not skip the flashing inspection.
- Old deck demo and disposal: Tearing out an existing deck costs $500-$2,000 depending on size and disposal fees. Rotted wood is heavier and slower to demo than sound wood.
- Permits and inspections: A building permit runs $100-$500. Most jurisdictions require 2-3 inspections: footings before the pour, rough framing, and final. Budget the time too, not just the cost.
- Drainage and grading: Water pooling under a deck accelerates rot and attracts insects. Grading the area costs $200-$800 but protects the framing for decades.
- Stairs and landings: Many quotes price stairs separately or leave them out entirely. A single 4-step stair section adds $600-$1,500. Multi-landing designs add $2,000+.
How to Use This Calculator
Enter Deck Dimensions
Input the length and width of your deck in feet to calculate the total square footage.
Select Decking Material
Choose between pressure-treated wood, composite, or PVC decking. Each material has different cost ranges and longevity.
Add Railing and Stairs
Indicate whether you need railing and how many stair steps. Railing is calculated for three sides of the deck.
Review Cost Breakdown
See a detailed breakdown of materials, labor, railing, and stairs with low and high estimates for budgeting.
Deck Cost Formula
Total = (Area x Material $/sf) + Railing + Stairs + (Area x Labor $/sf)Where:
- Area
- = Deck length x width in square feet
- Material $/sf
- = Cost per square foot by material type (wood $15-25, composite $25-45, PVC $30-60)
- Railing
- = Perimeter minus one access side, multiplied by $20-60 per linear foot
- Stairs
- = Number of steps x $100-300 per step depending on material
- Labor $/sf
- = Installation labor at $20-40 per square foot
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Frequently Asked Questions
How much does it cost to build a deck per square foot?
Total installed deck cost ranges from $35-$65 per square foot for pressure-treated wood, $45-$85/sf for composite, and $50-$100/sf for PVC. These prices include materials and labor. Material alone is roughly 40-50% of the total cost, with labor making up the rest.
Is composite decking worth the extra cost?
Composite decking costs 40-60% more upfront but requires virtually no maintenance compared to wood, which needs staining or sealing every 2-3 years ($1-$3/sf each time). Over a 25-year lifespan, composite typically costs less when you factor in maintenance. Composite also does not rot, split, or attract termites.
Do I need a permit to build a deck?
In most jurisdictions, yes. Any deck over 30 inches above grade, attached to the house, or over 200 square feet typically requires a building permit. Permits usually cost $100-$500. The deck must meet local building codes for footings, ledger board attachment, railing height (36-42 inches), and baluster spacing (less than 4 inches).
How deep should deck footings be?
Deck footings must extend below the frost line, which varies by region: 12 inches in the South, 36-48 inches in the Midwest and Northeast, and up to 60 inches in parts of Minnesota and Wisconsin. Footings are typically 8-12 inches in diameter using concrete sono tubes. Check your local building code for exact requirements.
How long does it take to build a deck?
A professional crew of 2-3 people can build a standard 12x16 deck in 3-5 days. This includes digging and pouring footings (1 day, plus cure time), framing (1 day), decking and railing (1-2 days), and stairs (half day). Complex designs, multiple levels, or custom features add time. DIY builds typically take 2-3 weekends.
How much does a 12x16 deck cost?
A 12x16 deck (192 square feet) costs $7,000-$13,000 for pressure-treated wood, $9,000-$17,000 for composite, and $10,000-$20,000 for PVC. These prices include materials, labor, railing on three sides, and one stair section. Add $100-$500 for permits. Actual costs vary by region, soil conditions, and site access.
What is the cheapest type of deck to build?
Pressure-treated wood is the most affordable deck material at $35-$65 per square foot installed. It is widely available, easy to work with, and holds up for 15-20 years with regular maintenance. For a 12x16 deck, pressure-treated wood costs roughly $3,000-$5,000 less than composite. The trade-off is staining or sealing every 2-3 years.
How much does it cost to add stairs to a deck?
A standard 4-step deck staircase costs $600-$1,500 installed, depending on width and material. A wider 5-foot stair run with composite treads runs $1,200-$2,500. The calculator uses $100-$300 per step, which covers framing, stringers, treads, handrails, and post footings. Complex multi-landing stairs cost more. Use the stair calculator to lay out rise and run before you cut stringers.
Can I build a deck myself to save money?
Yes, and you can save 40-60% on labor. A 12x16 pressure-treated deck where a contractor charges $5,000-$8,000 in labor can cost $2,000-$4,000 in materials for a DIY build. You still need permits and inspections. Plan 2-3 full weekends for a 12x16 deck. Use the joist span calculator to size your framing correctly before you cut a single board.
What size deck can I build without a permit?
Permit thresholds vary by city and county. A common exemption applies to detached decks under 200 square feet, less than 30 inches above grade, and not attached to the house. But this is not universal. Some jurisdictions require permits for any deck. Check with your local building department before starting. Unpermitted work can cause problems at resale and may need to be torn down.
Deck Building Tools
- Joist Span Calculator - Max Span by Size and Species
- Board Foot Calculator - Lumber Quantities and Cost
- Concrete Calculator - Yards and Bags for Footings
- Stair Calculator - Rise, Run and Stringer Layout
- Contractor Estimate Template - Build a Professional Deck Bid
- Deck Framing Labor Cost Per Square Foot (2026 Rates)
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