The 2025 Cost Guide to Building a Deck in St. Louis, MO

Adding a deck to your home can boost your outdoor living space and increase your property value. But if you’re planning a deck project in St. Louis, Missouri, it’s essential to understand the costs involved so you can budget wisely and avoid surprises.

Average Cost of Deck Installation in St. Louis

Building a deck in St. Louis usually costs between $4,000 and $15,000, with the final price influenced by factors such as the deck’s size, chosen materials, design features, and labor requirements. On average, homeowners spend about $25 to $50 per square foot, including both materials and labor.

Wood decks (like pressure-treated lumber or cedar) are usually more affordable upfront but require more maintenance. Composite decks (made from recycled plastics and wood fibers) have a higher initial price but offer long-term durability with minimal upkeep.

For example, a 200-square-foot wood deck may cost around $6,000, while a composite version of the same size might be closer to $8,000 to $10,000. Custom features like built-in seating, railings, or multiple levels will increase the overall cost.

Factors That Impact the Cost

Multiple factors can influence the total cost of your deck project in St. Louis, including:

  • Deck Size: A larger deck requires additional materials and labor, which can significantly raise the total project cost.
  • Material Choice: Wood, composite, PVC, and aluminum all have different price points.
  • Site Preparation: Tasks like grading the land, removing existing structures, or clearing trees can add to your overall project expenses.
  • Permits & Inspections: St. Louis requires permits for most residential deck constructions.
  • Design Complexity: Curved edges, integrated lighting, or elevated decks require advanced skills and more time.

Working with experienced deck builders ensures your project meets local codes and is built to last, which can save you money on repairs or replacements down the road.

Choose the Right Contractor

Finding the right contractor is key to a successful deck installation. Look for landscaping contractors with experience in both design and construction. Be sure to ask for photos of previous work, verify insurance and licensing, and get a written estimate.

GreenScape STL is proud to be considered the best landscaping company in the region, with a long history of quality deck installations and creative outdoor solutions. Our skilled team is dedicated to creating beautiful, customized results that align with your vision and stay within your budget.

Maximize Your Investment

To get the most value from your new deck, consider how you’ll use the space. Whether it’s for entertaining guests, relaxing with family, or adding curb appeal, the right layout and features can make a big difference.

Pairing your deck with other outdoor enhancements—like hardscaping, lighting, or greenery—can create a seamless transition from indoor to outdoor living. Our full range of services means you can combine your deck project with other upgrades for a more cohesive and cost-effective result.

To learn more about landscaping in St. Louis MO, or to explore other outdoor services we provide, be sure to visit the Our Services page on our website.

Case Study: Understanding Deck Costs and Services in St. Louis


GreenScape STL offers professional deck-building solutions tailored to St. Louis homeowners.
According to details from their official website, project costs typically fall between $4,000 and $15,000, depending on the design, materials, and scope of work.

Their streamlined approach—from initial consultation through final installation—ensures quality and efficiency at every step.
Clients can explore additional outdoor upgrades, such as fences, patios, or retaining walls, to enhance their space.

To help homeowners plan ahead, GreenScape STL provides an online Build and Price tool, allowing users to estimate project costs before getting started.

Get Started Today

If you’re ready to take the next step toward building the perfect deck, don’t hesitate to reach out. Visit our About Us page to discover what sets GreenScape STL apart in quality and service. Still have questions? Our team is here to help—head over to the Contact Us section and let’s bring your outdoor vision to life.

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