Deck Cost Calculator
Estimate the cost of building a new deck. Compare wood, composite, and PVC materials with options for railings, stairs, and professional installation.
How Deck Cost Calculator Works
Estimate deck building costs by material, size, and features. Calculate wood, composite, or PVC decking with railings and stairs. deck budget planner. Enter your values into the form above and the calculator processes them instantly in your browser — no data is sent to any server.
How Much Does a Deck Cost to Build?
A new deck costs $15-$75 per square foot depending on materials and complexity. A standard 300 sq ft pressure-treated wood deck costs $4,500-$9,000 for materials and installation. Composite decking runs $8,000-$18,000 for the same size. Higher decks, multiple levels, and built-in features like seating or planters increase costs significantly. The framing and substructure typically account for 30-40% of the total cost regardless of the decking material chosen for the surface.
Deck Material Comparison
Pressure-treated wood is the most affordable option at $2-5 per square foot for materials but requires annual staining and eventual replacement after 10-15 years. Cedar and redwood cost $5-10 per square foot and naturally resist rot but still need periodic maintenance. Composite decking costs $8-15 per square foot but lasts 25-30 years with minimal maintenance and no staining required. PVC decking at $10-18 per square foot offers the highest durability and moisture resistance. Factor in lifetime maintenance costs when comparing since a composite deck that never needs staining may cost less than wood over 20 years.
Deck Building Tips and Considerations
Check local building codes since most areas require permits for decks and have specific requirements for railings, spacing, and structural support. Elevated decks over 30 inches typically require railings by code. Consider the deck orientation for sun exposure and privacy. Ground-level decks are simpler and cheaper to build. Use hidden fastener systems for a clean look with composite materials. Add post caps and lighting for both aesthetics and safety. Plan for adequate ventilation under the deck to prevent moisture buildup. Get at least three contractor quotes and check references before hiring.
Frequently Asked Questions
How much does it cost to build a deck?
A standard 300 sq ft deck costs $4,500-$9,000 for pressure-treated wood and $8,000-$18,000 for composite, installed. Costs vary by material, size, elevation, and features like railings and stairs.
Is composite decking worth the extra cost?
Yes for most homeowners. Composite costs 2-3x more upfront but lasts 25-30 years without staining or sealing. Wood needs annual maintenance costing $200-$500/year, making composite cheaper over its lifetime.
Do I need a permit to build a deck?
Most areas require permits for decks, especially those over 30 inches above ground. Check local building codes before starting. Permits typically cost $200-$500 and ensure structural safety.
How long does it take to build a deck?
A professional crew builds a standard deck in 3-7 days. DIY projects take 2-4 weekends depending on experience and complexity. Permits and material ordering may add 1-4 weeks before construction begins.
What is the best deck material for low maintenance?
PVC decking requires the least maintenance, followed by composite. Both resist rot, insects, and fading. Neither needs staining or sealing. PVC handles moisture better, making it ideal for pool decks.