A well-built deck has a way of transforming a home. It becomes an outdoor room, a place to gather, to breathe, to unwind. In many Greater St. Louis neighborhoods—from Webster Groves to Chesterfield—homeowners are rediscovering the value of an elevated, beautifully crafted deck that extends their living space with purpose and personality.
But when you begin thinking about a remodel, one question always leads the conversation: How much will it cost?
At Morganco Design Build, cost is never a mystery. It’s a thoughtful equation built from material quality, structural integrity, design intention, and the craftsmanship required to create a deck that stands strong through Missouri’s humidity, freeze–thaw cycles, and heavy tree cover.
This guide walks through every factor that shapes pricing in our region, so you can understand what goes into a durable, elegant deck—and why choosing the right builder matters just as much as the materials you select.
READ: What to Consider When Designing a Deck That Lasts in Missouri Weather
Understanding Deck Remodeling Costs in Missouri
Why Deck Pricing Varies So Widely
Deck remodel costs aren’t universal because no two homes—and no two backyards—are the same. In Missouri, we work with sloped lots, clay soil, mature trees, irregular setbacks, and the full spectrum of weather patterns. These elements influence everything from the size of the footings to the type of structural support required.
Three major factors drive cost variation:
Existing Deck Condition
A deck in poor structural shape may require new footings, ledger replacement, or completely rebuilding the frame. This can significantly change the scope compared to a simple resurfacing.Material Choices
Pressure-treated lumber, cedar, composite, and PVC each come with different lifespans, maintenance levels, and price points. The same applies to railing systems, which can shift budgets dramatically.Design & Complexity
A straightforward 12×16 rectangle is very different from a two-tiered deck with integrated lighting, privacy screens, a fire feature, or custom seating. The more intentional the design, the more time and craftsmanship involved.
A remodel isn’t just an upgrade—it’s a reinvestment in structural safety, long-term durability, and daily enjoyment. That’s why pricing must reflect more than surface-level improvements.
Average Deck Remodel Costs in Missouri & the Greater St. Louis Area
Across St. Louis County, St. Charles County, and nearby communities, most homeowners fall into one of three cost ranges:
| Deck Remodel Type | Typical Cost Range (Missouri) |
|---|---|
| Cosmetic Updates / Small Repairs | $8,500 – $18,000 |
| Mid-Range Remodel or Composite Resurfacing | $20,000 – $45,000 |
| Full Rebuild or Luxury Outdoor Living Space | $48,000 – $95,000+ |
Disclaimer: These are estimates only. Contact us today to learn the exact estimate for your deck.
These ranges reflect the realities of craftsmanship that respects local climate, material performance, and safety standards. The goal is never to build “just another deck,” but a long-lasting extension of your home.
What a “Quality Remodel” Really Includes
A truly well-executed remodel goes far beyond replacing boards. Missouri’s weather demands a deck that’s engineered with precision:
Proper flashing to protect the home’s envelope
Correctly sized beams and joists based on span and load
Extra attention to drainage to avoid long-term rot
Stair and railing safety that meets—or exceeds—modern code requirements
Hidden fasteners and premium connections for a clean, strong finish
Homeowners often tell us they didn’t know these steps were part of a remodel. But to us, they’re non-negotiable. They’re what separate a deck that lasts five years from one that lasts twenty-five.
Cost by Deck Type: From Basic Upgrades to Luxury Outdoor Living
Understanding cost starts with understanding the scope. Deck remodels in Missouri range from surface-level improvements to full structural reconstruction, and each type carries its own requirements for materials, engineering, and craftsmanship.
Repairing or Refinishing an Existing Deck
When the underlying structure is sound, refinishing or repairing a deck is the most cost-efficient path. In many St. Louis homes—especially those built in the 1990s and early 2000s—the framing may still be serviceable, even if the surface boards and railings are worn.
Repairs often involve:
Replacing damaged or rotting deck boards
Updating railings for safety and improved aesthetics
Reinforcing joists where moisture has caused early deterioration
Power-washing, sanding, and refinishing wood surfaces
These projects typically land on the lower end of the cost spectrum because the foundation remains intact. Even so, precision matters. A poor repair can create uneven surfaces, moisture traps, or weak connection points. At Morganco Design Build, we treat refinishing with the same discipline as a full build—every fastener, transition, and joint is inspected and corrected with care.
Rebuilding an Aged or Failing Deck Structure
Many Missouri decks built 20+ years ago simply weren’t designed for today’s safety standards or weather extremes. Rot, undersized joists, outdated ledger attachments, and shifting soil can all compromise structural integrity.
A full rebuild involves:
Removing the existing deck
Installing new footings that meet current code
Constructing a modern, engineered frame
Applying new decking, railings, and finishes
This gives homeowners the chance to correct original builder errors, increase stability, and choose more durable materials. Rebuilds often fall into the mid-to-upper pricing tier because they require skilled structural work—not just surface replacement.
Expanding a Deck for More Usable Space
Many St. Louis homeowners want their deck to function more like a true outdoor living room. Expanding the footprint allows room for dining, seating, grilling, or creating designated conversational zones.
Expanding a deck typically requires:
Additional footings
Structural reconfiguration
Adjustments to grade, drainage, or landscaping
New railings, stairs, or transitions
The complexity depends heavily on the existing yard conditions and elevation. For homes on sloped lots—common in areas like Ballwin and Wildwood—expansion requires careful engineering to ensure long-term stability and proper water management.
Full Luxury Outdoor Living Spaces (Fire Pits, Lighting, Shade Structures, and More)
A luxury outdoor space goes beyond a standard deck. These projects transform the entire backyard into a multi-functional extension of the home.
They may include:
Custom pergolas or shade structures
Built-in seating or storage
LED lighting systems
Gas lines for fire features or outdoor kitchens
Under-deck drainage and dry spaces
Composite or PVC decking designed to last decades
These spaces require detailed design, architectural planning, and the kind of craftsmanship that treats every joint and connection like cabinetry. With this level of work, cost is influenced not just by materials but by the skill and time required to execute the design flawlessly.
Material Choices and Their Impact on Cost
Material selection affects not only the upfront cost but also the long-term durability and maintenance requirements of your deck. In Missouri’s climate—heavy humidity, harsh sun, and freeze–thaw cycles—choosing the right materials is one of the most important decisions you’ll make.
Pressure-Treated Lumber
Pressure-treated lumber remains the most budget-friendly material option. It provides dependable performance when installed and sealed properly, but it does require ongoing maintenance.
Key considerations:
Prone to warping if not protected
Needs regular staining or sealing
Works well for structural framing
Shorter lifespan compared to composite materials
Many St. Louis homeowners choose pressure-treated lumber when prioritizing cost but still want a structurally sound deck built with quality workmanship.
Cedar and Redwoods
Cedar provides a warm, natural appearance that many homeowners appreciate. It resists insects and rot better than standard pine but still requires diligent maintenance.
Characteristics:
Soft, easy to work with
Develops a natural silver patina if left untreated
Higher cost than pressure-treated lumber
Still requires ongoing care to maintain its appearance
Cedar is often chosen for homeowners who value natural wood aesthetics and are willing to commit to periodic maintenance.
Composite and PVC Decking
Composite and PVC decking have become the top choice for long-term performance. Brands like TimberTech and Trex offer materials engineered to handle Missouri’s weather with minimal upkeep.
Advantages include:
Fade, scratch, and moisture resistance
Long lifespan with little maintenance
Wide range of colors and textures
Excellent performance in shaded or damp areas
Cost is higher upfront, but the tradeoff is decades of lower maintenance and far better durability.
Railing Options and Their Price Ranges
Railings significantly shape the look—and cost—of a deck. Aluminum railings, cable systems, powder-coated steel, and composite rails each offer different aesthetic and performance qualities.
Common considerations:
Aluminum is sleek, durable, and low-maintenance
Cable railings provide modern lines and open sightlines
Wood railings are most affordable but require upkeep
Composite systems offer long-lasting performance with clean detailing
Homeowners are often surprised that railings can represent 20–30% of the total project cost, depending on the style and material.
Hidden Fasteners, Hardware, and Structural Components
These elements rarely show up in initial price comparisons, but they dramatically affect durability and appearance.
High-quality components include:
Hidden clip systems for seamless board lines
Corrosion-resistant screws and brackets
Ledger flashing and waterproofing membranes
Heavier-duty connectors rated for Missouri’s climate
This is where craftsmanship makes the biggest difference. The best decking materials can still fail if installed with low-grade hardware or incorrect techniques. At Morganco Design Build, we use premium structural materials not because they’re required—but because they are right.
Labor, Craftsmanship, and Design: Why the Builder You Choose Matters
A deck remodel is only as strong as the hands and minds behind it. Materials matter, but craftsmanship determines whether those materials perform for five years or thirty. In Missouri—where heat, moisture, and seasonal movement test every connection—builder skill becomes a defining cost factor.
Engineering for Missouri’s Climate
Outdoor structures in St. Louis experience intense weather fluctuations. Wood expands, contracts, flexes, and absorbs moisture. Composites heat up and cool down quickly. Every material behaves differently, and every deck must be engineered with these realities in mind.
A properly engineered deck includes:
Joist spacing that matches the specific deck board brand and type
Ventilation considerations for composite materials
Moisture barriers in critical locations
Structural adjustments to handle snow load, wind, and lift
These technical decisions ensure the deck performs consistently through the Midwest’s unpredictable conditions.
Structural Requirements for Elevated Decks in St. Louis
Many St. Louis neighborhoods—such as Ballwin, Oakville, and Eureka—feature walkout basements. Elevated decks in these locations carry higher engineering demands than ground-level platforms.
Key requirements include:
Oversized footings that reach below frost depth
Heavier load-bearing posts
Lateral bracing to prevent sway
Secure ledger attachment with approved hardware
Stair systems designed for stability on sloped terrain
This level of work requires precision, experience, and professional oversight. At Morganco Design Build, these elements are standard practice—not upgrades.
The Difference Between Builder-Grade Work and Master Craftsmanship
Builder-grade decks assemble quickly and inexpensively—but at the cost of longevity, alignment, and structural strength.
Master craftsmanship looks different:
Perfectly aligned miters and consistent board spacing
Clean fastener patterns or hidden fastener systems
Flashing details executed with care
Railings installed with cage-like rigidity
Transitions, stairs, and trim treated as finish carpentry
These are the details homeowners may not list in their wishlist but certainly notice once the project is complete. Quality is visible every time you step outside.
Permitting, Codes, and Local Regulations
Every municipality in the St. Louis region has its own requirements—Creve Coeur, Manchester, and St. Peters all review decks differently.
A compliant project includes:
Permit submission and plan approval
Accurate site measurements
Structural drawings when required
Inspections at footing, framing, and final stages
This process protects the homeowner and ensures the deck is built with safety and longevity in mind. Cutting corners here often leads to violations or unsafe structures later.
Additional Features That Influence Deck Remodel Cost
Deck remodels are no longer limited to a simple platform and railings. Outdoor living trends have expanded what homeowners expect from their space, and each additional feature carries its own cost considerations.
Built-In Seating and Storage
Built-in elements offer both utility and craftsmanship:
Benches integrated into railing lines
Storage bays for cushions and supplies
Seating walls that define gathering spaces
These details require additional framing and finish carpentry, which elevates both the design and the project cost.
Under-Deck Waterproofing Systems
For elevated decks, an under-deck drainage system can convert the space below into a dry, usable patio. It’s a smart addition for homes with walkouts or limited yard space.
A proper waterproofing system includes:
Panels or membranes installed beneath joists
Gutter channels for controlled drainage
Finishing options like ceiling panels, fans, or lighting
This feature adds significant utility but requires skilled installation to prevent future leaks.
Lighting, Electrical, and Gas Lines
Lighting transforms a deck from a daytime amenity to a full-time living space. Electrical and gas upgrades elevate function and safety.
Common additions include:
Stair and perimeter LED lighting
Outlets for appliances, heaters, or outdoor TVs
Gas lines for fire pits or grills
These features require careful coordination with electricians and compliance with local building codes.
Landscaping Integration
A deck should feel intentional—tied into the home, the yard, and the surrounding landscape.
Examples of integrated elements:
Retaining walls meeting deck edges
Grading adjustments for proper drainage
Planting beds that soften transitions
Stone or paver walkways connecting spaces
These finishing touches often appear near the end of a project but can influence overall cost depending on complexity.
Privacy Screens, Fencing, and Sound Buffers
For homes with close neighbors or busy surrounding streets, privacy additions can dramatically improve comfort.
Options include:
Decorative privacy panels
Horizontal slat screens
Louvered designs for airflow and privacy
Sound-dampening fencing or plantings
These features add material cost and require thoughtful design so they complement—not overpower—the deck.
How to Budget Wisely for a Deck Remodel
A well-planned budget isn’t simply a number—it’s a roadmap. It helps homeowners make informed decisions, prioritize what matters most, and avoid surprises along the way. In our experience across the Greater St. Louis area, the most successful projects come from a balance of clear goals, durable materials, and long-term value.
Setting Priorities Before You Build
The first step in budgeting is understanding how your deck will truly be used. A quiet morning space off a kitchen requires a different design than a large entertainment platform overlooking a backyard.
Before discussing numbers, we often ask homeowners:
How often will you use the space?
Do you host gatherings or prefer intimate seating?
Do you need shade, privacy, or integrated lighting?
Will you use the area underneath the deck?
These questions guide the design and help determine where to invest—structure, materials, or lifestyle features.
Choosing Materials for Longevity and Low Maintenance
Material choices directly affect long-term cost. Pressure-treated lumber may cost less upfront, but it requires sealing and maintenance that add time and expense over the years. Composite and PVC decking require a larger initial investment, but they offer decades of performance with minimal upkeep.
Homeowners often choose composite materials not for appearance alone, but because they want to eliminate future repairs and refinishing. In Missouri’s climate, that choice pays off quickly.
When to Repair vs. When to Rebuild
A thorough inspection reveals whether your existing deck can be salvaged or if it’s time for a full rebuild. We look at the joists, beams, posts, ledgers, and footings to determine structural health.
Repairs make sense when:
The framing is in good shape
Only surface materials are worn
Safety concerns are minimal
A rebuild is the wiser investment when:
The frame shows signs of rot or shifting
The deck wasn’t built to code originally
You want to change the footprint or add complex features
A careful evaluation ensures you’re investing your budget where it delivers the most long-term value.
Planning for Future Add-Ons or Expansion
Even if you’re not ready for a pergola, outdoor kitchen, or screened-in area today, the deck structure can be designed to support these additions later.
Forward-thinking design may include:
Additional footings
Conduit for future wiring
Reinforced framing in specific areas
Strategic placement of posts and beams
Planning ahead avoids the cost and disruption of reworking a deck that wasn’t originally engineered for expansion.
A deck remodel is more than an upgrade—it’s an investment in how your home feels, functions, and welcomes your family outdoors. In Missouri, where weather puts every material and connection to the test, the difference between a basic build and a truly well-crafted deck becomes obvious over time.
If a deck remodel is on your mind, we’re here to walk the property with you, explore ideas, and design a solution that respects both your home and your budget. From initial concept to final detail, your project receives the care, precision, and artistry that define Morganco Design Build. Contact us today for a free consultation!