How much does it cost to add a deck in 2026?

A pressure-treated wood deck costs $25-$45 per square foot installed, a composite deck runs $45-$75 per square foot, and a tropical hardwood deck costs $60-$100 per square foot. A typical 400 sq ft deck runs $10,000-$30,000 fully installed, depending on material, height above grade, and local labor rates.

Is a concrete patio cheaper than a deck?

Usually yes. Basic poured concrete patios run $8-$18 per square foot, while decorative concrete (stamped, stained) runs $15-$35 per square foot. Concrete pavers cost $15-$40 per square foot installed. For ground-level applications, a patio almost always costs less than a deck — but decks are often the only option for elevated terrain.

Do you need a permit to build a deck or patio?

In most jurisdictions, any deck attached to the house or elevated more than 12-30 inches above grade requires a building permit. Detached, ground-level patios under a certain size threshold typically don't. Permit costs average $100-$700 and include an inspection that protects you from substandard work. Contractors who skip permits are a red flag.

What's the ROI on adding a deck or patio?

A composite deck addition recovers approximately 40-50% of its cost at resale according to Remodeling Magazine's 2026 Cost vs. Value report, while a wood deck recovers 50-60%. ROI is higher in regions where outdoor living is used year-round. Patios typically increase functional outdoor living space and are harder to value independently at resale.

How long does it take to build a deck?

A standard deck takes 3-7 days to construct once materials are on site, though the full project timeline including permits, design, and material lead times typically runs 4-8 weeks. Complex multi-level decks with built-in features can take 2-3 weeks of construction time.

Deck and Patio Addition Cost Guide 2026: What Homeowners Actually Pay

September 22, 2026 · Cost Guide · 5 min read

A deck or patio addition is one of the most common exterior projects homeowners take on — and one of the widest cost ranges in residential construction. A simple ground-level concrete patio can be done for $3,000; a multi-level composite deck with built-in seating and a pergola can run $60,000+. Here's how to decode the cost structure so you can evaluate contractor quotes intelligently.

Material Costs: The Biggest Variable

Material is the single largest variable in deck and patio pricing. Here's how the main options compare for a 400 sq ft project:

Deck Materials

Pressure-treated pine: $10,000-$18,000 installed. Lowest upfront cost. Requires annual sealing/staining, prone to warping and splinters over time. Life expectancy 15-25 years with maintenance.
Cedar or redwood: $14,000-$22,000 installed. Better natural rot resistance than pine, more stable, takes stain well. Similar maintenance schedule. Life expectancy 20-30 years.
Composite decking (Trex, Fiberon, TimberTech): $18,000-$30,000 installed. Highest upfront cost, very low maintenance — cleaning only, no staining or sealing. Life expectancy 25-50 years. Best long-term cost when factoring in maintenance.
PVC decking: $20,000-$34,000 installed. Similar to composite but 100% synthetic — best for wet climates.
Tropical hardwood (ipe, teak, cumaru): $24,000-$40,000 installed. Extremely dense and durable. Requires annual oiling. When maintained, can last 40-75 years.

Patio Materials

Poured concrete: $3,200-$7,200 for 400 sq ft ($8-$18/sq ft). Low cost, durable. Limited aesthetics unless stamped or stained.
Stamped/decorative concrete: $6,000-$14,000 for 400 sq ft. Better appearance, same base material. Sealing required every 2-3 years.
Concrete pavers: $6,000-$16,000 for 400 sq ft. Can be repaired piecemeal. More design flexibility.
Natural stone (flagstone, travertine, bluestone): $10,000-$24,000+ for 400 sq ft. Premium look; cost varies significantly by stone type and regional availability.
Brick pavers: $8,000-$18,000 for 400 sq ft. Classic appearance, good durability, repairable.

Height Above Grade: The Structural Multiplier

Ground-level decks (0-18 inches above grade) are significantly cheaper than elevated decks. Once a deck exceeds 18-24 inches, it requires deeper footings (often to frost line, 24-48 inches in northern climates), more structural lumber and beams, guardrails (required by code for decks over 30 inches), and often a building permit regardless of size. A second-story deck attached to a second-floor door can cost 30-50% more than a comparable ground-level deck of the same square footage.

Regional Labor Rates

Labor accounts for 40-60% of most deck and patio projects. Based on profiles in our contractor directory, average composite deck installation labor runs approximately:

Southeast (Georgia, Tennessee, Alabama): $18-$28 per square foot
Midwest (Illinois, Ohio, Michigan): $22-$35 per square foot
Southwest (Texas, Arizona): $18-$30 per square foot
Northeast (New York, New England): $30-$55 per square foot
West Coast (California, Washington, Oregon): $28-$50 per square foot

Cost Add-Ons Beyond the Basic Platform

Built-in seating/benches: $500-$2,000
Pergola or shade structure: $3,000-$15,000 depending on size and material
Stairs: $300-$1,500 per flight
Built-in outdoor kitchen or grill station: $5,000-$30,000
Outdoor lighting (professional wiring): $500-$3,000
Built-in gas or wood fire pit: $1,000-$5,000

Permit Requirements

In most municipalities, any deck attached to the house requires a permit, decks over 200 sq ft require a permit regardless of attachment, and decks over 30 inches above grade require guardrails meeting specific height and load requirements. Permit costs typically run $100-$700 and include one or more inspections. Contractors who offer to skip the permit are saving themselves hassle at your long-term expense — unpermitted work can complicate home sales and isn't covered by homeowner's insurance for subsequent damage.

Reading and Comparing Bids

Get at least three bids. When you receive them, confirm each includes: specific material specification (brand, product line, color for composite; grade for wood), total square footage as scoped, post depth and footing type (a structural safety item), whether permit is included, warranty information for materials and labor, and a payment schedule tied to milestones.

Our guide on writing a scope of work before hiring a contractor covers how to lock down specs in writing so bids are actually comparing the same project — not different interpretations of what you described verbally.

Payment Schedule for a Deck Project

A typical payment structure for a $15,000-$25,000 deck project:

Deposit (10-20%): Secures the schedule and covers initial material ordering
Material delivery milestone (25-30%): Due when lumber or decking is delivered on site
Framing completion milestone (25-30%): Due when structural frame and footings are complete and inspected
Completion (remaining 20-30%): Due after final walkthrough

Be cautious of contractors who ask for more than 30-40% upfront before work begins. Our guide on contractor payment schedules and milestones covers what's normal and what's a red flag at each stage.

Long-Term Cost Comparison: Wood vs. Composite

A $12,000 pressure-treated deck that requires $400-$800 per year in cleaning, sealing, and repairs adds $6,000-$12,000 in maintenance costs over 15 years before it needs replacement. A $22,000 composite deck requiring only $100-$200/year in cleaning costs $1,500-$3,000 over the same period — and typically has years of service life remaining. The total cost of ownership often favors composite over a 15-20 year horizon even though the upfront cost is higher.

For a broader view of which home additions generate the best returns, our home renovation ROI guide includes decks alongside kitchens, bathrooms, and other common projects with current regional data.

Finding a Contractor for Your Deck or Patio Project

Browse ContractorRanked by city to find general contractors and deck specialists in your area, or search directly for general contractors near you. When comparing profiles, look for contractors who list deck and outdoor living projects specifically — experience in this project type reduces both cost overruns and structural issues.

Frequently Asked Questions

How much does it cost to add a deck in 2026?: A pressure-treated wood deck costs $25-$45 per square foot installed, a composite deck runs $45-$75 per square foot, and a tropical hardwood deck costs $60-$100 per square foot. A typical 400 sq ft deck runs $10,000-$30,000 fully installed, depending on material, height above grade, and local labor rates.
Is a concrete patio cheaper than a deck?: Usually yes. Basic poured concrete patios run $8-$18 per square foot, while decorative concrete (stamped, stained) runs $15-$35 per square foot. Concrete pavers cost $15-$40 per square foot installed. For ground-level applications, a patio almost always costs less than a deck — but decks are often the only option for elevated terrain.
Do you need a permit to build a deck or patio?: In most jurisdictions, any deck attached to the house or elevated more than 12-30 inches above grade requires a building permit. Detached, ground-level patios under a certain size threshold typically don't. Permit costs average $100-$700 and include an inspection that protects you from substandard work. Contractors who skip permits are a red flag.
What's the ROI on adding a deck or patio?: A composite deck addition recovers approximately 40-50% of its cost at resale according to Remodeling Magazine's 2026 Cost vs. Value report, while a wood deck recovers 50-60%. ROI is higher in regions where outdoor living is used year-round. Patios typically increase functional outdoor living space and are harder to value independently at resale.
How long does it take to build a deck?: A standard deck takes 3-7 days to construct once materials are on site, though the full project timeline including permits, design, and material lead times typically runs 4-8 weeks. Complex multi-level decks with built-in features can take 2-3 weeks of construction time.