How Much Does a Deck Cost in St. Louis?
- Dominic Freed
- Feb 20
- 4 min read

If you’re considering building a deck in the St. Louis area, you’re likely wondering, “How much does a deck cost?” The truth is, the cost of building a deck can vary widely based on the size, materials, and features you choose. In this guide, we'll break down the costs associated with different types of decks, including pressure-treated wood, composite, and high-end options like Trex and TimberTech.
Why Build a Deck in St. Louis?
St. Louis offers a vibrant outdoor lifestyle with its mix of urban and suburban settings. A deck extends your living space into the outdoors, offering a perfect place for barbecues, family gatherings, or simply enjoying Missouri's beautiful seasons. Whether you own a historic home in the city or a modern house in the suburbs, a deck adds value and function to your property.
Factors That Influence St Louis Deck Costs
The total cost to build a deck in St. Louis depends on several factors:
Size of the Deck: The larger the deck, the higher the cost.
Materials Used: From pressure-treated wood to premium composites like Trex and TimberTech.
Labor Costs: Depending on the complexity of the build and local labor rates.
Additional Features: Stairs, railings, enclosed patios, or custom designs can add to the price.
Permits and Local Regulations: Some municipalities require permits, which can add to the cost.
Average Costs of Different Deck Types
1. Pressure-Treated Wood Decks
Average Cost: $50 to $60 per square foot for a reputable deck builder.
Low-End Cost: You might find prices as low as $15 to $25 per square foot, but this often means hiring someone without proper experience, permits, or insurance, potentially leading to issues when selling your home.
Example: A 12x12 pressure-treated deck may cost between $7,200 and $8,640 with a reputable builder.
Pros: Affordable, widely available
Cons: Requires regular maintenance
2. Composite Decking (e.g., Trex, TimberTech)
Average Cost: $60 to $80 per square foot, with high-end options reaching $120 per square foot.
Example: A 20x20 composite deck can range from $24,000 to $32,000, with premium materials pushing this up to $48,000.
Pros: Low maintenance, long-lasting
Cons: Higher upfront cost
3. High-End or Custom Decks Pricing For St Louis
Average Cost: $120+ per square foot
Example: A fully customized 16x20 deck with premium materials, lighting, multi-levels, and the works could easily exceed $38,400.
Pros: Customizable, increases home value for the right buyer.
Cons: Significant investment
Cost of Additional Deck Features
Adding Stairs: In the St. Louis area, stairs are generally included in the square footage pricing. The total cost will depend on whether your deck is pressure-treated, composite, or custom.
Enclosing a Deck: $10,000 to $20,000
Adding a Roof: $15,000 to $40,000, depending on finishes, electric work, and screening.
Screening in a Deck: $7 to $15 per square foot, based on design and materials.
How Much Does It Cost to Replace a Deck?
If you already have a deck that needs replacing, expect to pay new deck building costs with an additional $6 per square foot for teardown, plus any dumpster or dump fees for the debris. However, with Freedom Home Improvements, you can save money by tearing down your own deck, reducing the overall cost.
Rebuilding a 12x12 Deck: A reputable pressure-treated deck could cost between $7,200 and $8,640, while composite options might range from $8,640 to $11,520, and custom builds could exceed $17,280.
How to Save Money When Building a Deck
Plan Simple Designs: Complex shapes increase labor and material costs.
Choose Standard Sizing: Helps reduce waste when cutting materials.
Use Local Contractors: Local companies often offer competitive pricing and better service. For example a large multi state builder like Midtown Home Improvements Will be more expensive than a local to St Louis Deck Builder like Freedom Home Improvements ;)
Deck Maintenance Costs
Pressure-Washing: $200 to $400
Sealing & Staining: $500 to $5000
Repairs: $100 to $1,000 depending on the damage
Common Mistakes to Avoid When Building a Deck
Not Getting Permits: Can lead to fines to the homeowner. Even if there is a contractor building the deck, the homeowner is liable. You may also face having to redo work.
Ignoring Maintenance Needs: Especially important for wood decks (Our pressure treated cedar tone decking only requires staining and sealing every 3-5 years).
Choosing the Wrong Materials: Consider longevity, maintenance, and cost.
Is It Worth Investing in a New Deck?
Building a deck not only enhances your outdoor space but also adds to your home's value. Many St. Louis homeowners find that a well-built deck provides an excellent return on investment, especially if you choose durable, low-maintenance materials.
Get a Free Estimate
If you’re ready to explore your deck-building options, contact us today for a free estimate. Whether you’re looking for an affordable pressure-treated deck or a luxurious composite deck, we can build the deck that fits your needs and budget
Conclusion
The cost to build a deck in St. Louis depends on many factors, but by understanding your options and working with a reliable contractor, you can achieve a beautiful, functional outdoor space. Ready to get started? Reach out to Freedom Home Improvements today!