Composite decking installation costs vary widely in the Chicago suburbs due to size, materials, and the features you choose. The three biggest factors that move the price are your railing system, the complexity of the deck layout, and which composite brand and product line you select. Most homeowners in our service area invest somewhere between $30,000 and $60,000 for a well-built composite decking installation, though multi-level builds with added features can run significantly higher.
Homeowners will often ask, “How much does a composite deck cost?” But they also want to know: “Why do I keep getting quotes that are so far apart?” The team at American Deck Builders has built more than 5,000 decks across Chicago’s West and Northwest suburbs over the past 30 years. That experience tells us the answer: Composite decks are not a single product at a single price, and the difference between a $20,000 deck and a $180,000 deck is not luck or contractor markup. It is choices.
What Does Composite Decking Installation Actually Cost? The Short Answer
Most homeowners want a number before they want an explanation. Here is the honest range, anchored to real projects we have completed in your area.
Composite decking installation in the Chicago suburbs falls into four broad tiers, and the tier you land in depends almost entirely on what you want the deck to do and how it should look.
- Entry-Level Composite Builds: These projects typically run around $20,000 to $25,000. A good example is a deck we built in Palatine using Deckorators Venture decking, Trex Select railings, and a Deckorators privacy screen. The homeowners wanted a low-maintenance, attractive outdoor space that provided privacy from neighbors. They got exactly that, without overspending on features they did not need.
- Mid-Range Single-Level Builds: This tier ranges from $30,000 to $45,000 for most projects. A Palatine homeowner came to us wanting a large entertaining deck with easy yard access and a clean, low-maintenance finish. We designed a spacious layout with dual staircases, Deckorators decking, Trex T-Rail, and Trex PVC fascia. The result was a deck built for gathering, with a layout that made the yard feel connected to the house.
- Upper Mid-Range Multi-Level Builds: Projects in this tier typically range from $80,000 to $100,000. A Winnetka homeowner wanted a multi-level deck with a gas fire pit that provided distinct seating and relaxation areas while maintaining a modern, cohesive look throughout. We built the entire project in AZEK, using AZEK decking, AZEK railings, AZEK trim, and PVC skirting. The result is a fully integrated outdoor environment where every surface and detail works together.
- High-End and Fully Engineered Builds: Projects in this range typically run $100,000 and above, sometimes significantly above. Two projects in Elgin illustrate what is possible at this level. One featured AZEK Coastline decking, Crystal Rail glass panels, LVL beams to minimize post count, Trex RainEscape waterproofing, and County Grand Discover pavers below, coming in at $150,000 to $200,000. A second Elgin project used AZEK Slate Grey decking, Westbury glass railings, Westbury screen rail for the under-deck area, Trex RainEscape, and a full paver patio, also at $180,000 to $200,000. Both homeowners wanted a fully engineered outdoor environment, not just a deck.
What is Actually Included in a Composite Deck Price, and What Is Not?
Homeowners who get three quotes and see three wildly different numbers are usually comparing three different scopes of work. A composite decking installation quote should include the decking boards, subframe and joists, footings, ledger attachment to the house, railings, stairs, and permit fees.
What often gets quoted separately, or left out entirely, are the features that turn a deck into an outdoor living space.
- Under-Deck Waterproofing: Systems like Trex RainEscape capture water that falls through the decking boards and route it away from the area below. This keeps the space under an elevated deck dry and usable year-round. It is not included in a standard deck quote unless you ask for it specifically.
- Deck Lighting: Railing-mounted lights, stair lights, and post-cap lighting add ambiance and usability after dark. Lighting packages range from a few hundred dollars to several thousand, depending on the scope. We treat lighting as an add-on unless the homeowner includes it in the original design conversation.
- Pergolas and Overhead Structures: A composite deck can serve as the platform for a pergola, motorized shade structure, or screened enclosure. These are separate structures with their own materials and labor costs. They should be scoped and quoted as part of the full outdoor living plan, not as an afterthought.
- Paver Patios Below or Adjacent to the Deck: Both of our high-end Elgin projects included paver patio work at ground level. Pavers are a hardscape product with their own installation process and cost. If you want the area below or beside your deck finished in pavers, that work needs to be included in the scope from the start.
What Are the Three Things That Move a Composite Deck Price the Most?
Three decisions drive the final cost of a composite decking installation more than anything else. Understanding them before you meet with a contractor will help you have a more productive conversation and get a more accurate quote.
- Railing Choice: The railing system is the single biggest variable in composite deck pricing outside of deck size. Standard aluminum or composite railings are functional and cost-effective. Glass panel systems like Crystal Rail or Westbury add cost to a full project, depending on lineal footage. Cable railing falls between the two. If you want unobstructed views, budget for a glass or cable system and plan accordingly.
- Deck Size and Structural Complexity: A simple single-level deck attached to the back of a ranch home costs less than a multi-level deck on a sloped lot or a poolside build that wraps around a water feature. Every level, staircase, and grade change adds framing, materials, and labor. The Winnetka multi-level build and both Elgin projects required additional structural engineering that a single-level build does not. That complexity adds cost, and it adds value.
- Composite Material Tier: Not all composite decking is the same product. Entry-level composite boards like Deckorators Venture or Trex Select are durable, attractive, and a significant step up from wood. Mid-range products like Trex Transcend and TimberTech Terrain offer more color options and a deeper wood-grain texture. High-end capped PVC products like AZEK are the most durable option available, with the longest warranties and the tightest tolerances. The difference in material cost between entry-level composite and AZEK can be $8 to $15 per square foot on the decking boards alone. Multiply that across a 600-square-foot deck and the impact on the total budget is significant. The Winnetka project used AZEK throughout, including decking, railings, trim, and skirting, which is one reason it lands where it does in the pricing tier.
Why Does Composite Hold Up Better Than Wood in the Chicago Climate?
Chicago’s freeze-thaw cycle is brutal on outdoor building materials. Wood decks absorb moisture in the spring, expand in the summer heat, contract in the fall, and split or warp when water trapped inside the boards freezes in January.
Composite decking handles that cycle differently. The boards do not absorb water the way wood does, which means they do not split, rot, or warp under the same conditions. The result is a surface that looks and performs well year after year without annual sanding, staining, or sealing. Low-maintenance decking is not just a convenience in this climate. It is a genuine long-term value when you calculate what you would spend on wood upkeep over 15 to 20 years.
AZEK and TimberTech products carry some of the strongest warranties in the industry, specifically because their manufacturers stand behind their performance in climates like ours. That is worth factoring into the composite decking price conversation when a homeowner tells us wood seems cheaper up front.
What Makes Composite Deck Costs Higher in the Chicago Suburbs Than National Estimates Suggest?
National cost guides publish composite decking installation ranges that often feel disconnected from what homeowners in the Chicago area actually pay. The gap is real and stems from several factors that national averages do not account for.
Illinois requires footings to extend below the frost line, which sits at approximately 42 inches in the Chicago area. That is deeper than most of the country. Deeper footings mean more concrete, more excavation, and more labor. It is not optional. Skipping it leads to frost heave, which means footings shift as the ground freezes and thaws, and the structure above them moves with it.
Cook County, DuPage County, Kane County, and Lake County each have their own permitting requirements. Pulling a deck permit in one suburb is not the same process as pulling one in the next town over. HOAs in many of our service communities require design drawings and formal approval before construction begins. We handle that process for our clients, but it takes time and has cost implications that need to be built into the project plan.
Labor costs in the Chicago metropolitan area are higher than the national average. A skilled framing crew in the suburbs costs more per day than the same crew in a rural market. That difference shows up in every composite decking installation quote we produce.
What Should You Ask Any Contractor Before You Sign?
The contractor you hire matters as much as the materials you choose. These questions will help you separate contractors who build decks well from those who simply build decks.
- Does this quote include permits and inspections? A quote that does not include permit fees is incomplete. Every structural deck in Illinois requires a permit, and the permit process includes inspections. Ask specifically whether those costs are included or will be billed separately.
- How do you handle HOA submissions? If your community has an HOA, the association needs to approve the design before construction begins. Ask whether the contractor prepares the drawings and submits them on your behalf, or whether that responsibility falls to you.
- What is your daily communication process during the build? A deck project is an active construction site on your property. You should know who your point of contact is, how often they will update you, and what the escalation path is if you have a concern. We assign a dedicated project manager to every job and provide daily updates throughout the build.
Why Chicago Homeowners Choose American Deck Builders
American Deck Builders has been building decks in Chicago’s West and Northwest suburbs for more than 30 years. We are a family-owned company with manufacturer credentials from both Trex and TimberTech, which means we have met the training and installation standards required by those manufacturers.
The 5,000 decks we have built across communities like Palatine, Elgin, Winnetka, Barrington, Schaumburg, Arlington Heights, Rolling Meadows, and Hoffman Estates represent a body of work, not just a number. Every one of those projects involved a homeowner who trusted us to manage their permit, coordinate their inspections, handle their HOA submission if needed, and show up every day with a plan.
We provide 3D design drawings before any contract is signed, so you can see what the finished deck will look like before a single board goes down. Our composite decking price breakdowns are itemized. We do not hide what you are paying for, and we do not cut corners on what you are not looking at.
Your Composite Decking Installation Starts With One Conversation
American Deck Builders has helped thousands of homeowners across Chicago’s West and Northwest suburbs turn their backyards into spaces they actually use. Your composite decking installation begins with a design consultation where we listen to what you want, assess your space, and give you a clear picture of the cost. Schedule a design consultation today and find out what is possible for your home.
Composite Decking Installation FAQs
How does composite decking compare to pressure-treated wood in the long run?
Composite decking costs more up front than pressure-treated wood, but it eliminates the annual maintenance costs that wood requires. Over 15 to 20 years, the total cost of ownership for composite decks is often lower once you account for the staining, sealing, and board replacement that wood demands in a climate like Chicago’s.
What factors most affect composite decking prices?
Composite decking price depends primarily on the size of the deck, the railing system you choose, the material tier you select, and the structural complexity of the build. Contact American Deck Builders for a design consultation, and we will give you a detailed estimate based on your specific yard, home, and goals.
How long does a composite deck installation take from start to finish?
The timeline for a composite decking installation depends on project size, permit processing time in your municipality, and the current build schedule. Permit timelines vary by county and can range from a few days to several weeks. Contact us for an accurate timeline estimate based on your location and project scope.
Is a permit required for a composite deck in the Chicago suburbs?
Every structural deck in Illinois requires a building permit, and the permit process includes structural inspections at key stages of the build. Skipping the permit creates liability problems when you sell the home and voids most manufacturer warranties on the materials. We handle the permit process for every project we build.
What is the difference between entry-level and high-end composite decking?
Entry-level composite products like Deckorators Venture and Trex Select are durable and low-maintenance, with a solid color range and clean appearance. High-end capped PVC products like AZEK offer tighter tolerances, deeper texture, more color options, and the strongest warranties in the category. The right choice depends on your budget, your goals, and how long you plan to stay in the home.
