composite deck cost in naperville

the short answer

A composite deck in the Naperville area costs $13,000 to $30,000+ for most homes — roughly $45 to $90 per square foot installed. Entry-level composite on a small ground-level deck starts near $8,000; a large elevated deck in a premium line like Trex Transcend or AZEK can pass $30,000.

The boards are only about a third of the price. Framing, footings below the Illinois frost line, railing, stairs and labor are the rest — and those are the same no matter what decking you choose.

composite cost by product tier

Installed pricing assumes standard framing, railing and one stair flight. Want numbers for other materials too? See our full deck cost guide for Illinois.

composite deck cost by size

Height matters as much as footprint: a second-story walkout adds roughly 20-35% over the same deck at grade. For an exact range on your layout, the deck cost calculator prices your size, height and railing in about a minute.

composite vs wood over 10 years

Pressure-treated pine is cheaper on day one — about $25-$45 per square foot installed — but it needs staining every 1-2 years in our freeze-thaw climate. Professionally done, that's roughly $1,500-$3,000 each cycle. Composite needs an occasional wash and nothing else.

Run the math over a decade and a mid-tier composite deck usually costs the same or less than the "cheap" wood deck — and it still looks new. If you're selling within a couple of years, wood often makes more sense; if you're staying, composite usually wins.

what drives composite deck prices up

• railing — aluminum and cable rail can add thousands across a long perimeter; composite-sleeve rail is the middle ground
• stairs — every flight adds framing, treads and labor, and composite stair treads cost more than wood
• picture-frame borders & inlays — the finishing details that make composite look high-end also add board waste and cutting time
• height & footings — taller decks mean deeper footings, bracing and longer stair runs
• hidden fasteners — standard on our builds and included in the tiers above; face-screwing is cheaper but shows

questions we get

how much does composite decking cost per square foot?

Installed composite decking runs about $45-$90+ per square foot in the Naperville area in 2026, depending on the product line, railing style, height and stairs. The boards themselves are roughly a third of that; framing, footings, railing and labor make up the rest.

is composite decking worth the extra cost over wood?

Usually, if you're staying in the home. A pressure-treated deck needs staining every 1-2 years — roughly $1,500-$3,000 each time professionally done. Composite washes with soap and water, so it typically pays back the price gap within 7-10 years and keeps going.

trex vs timbertech — which costs more?

Comparable tiers land within a few dollars of each other. Trex Transcend and TimberTech AZEK both sit at the premium end; AZEK's full-polymer boards price slightly higher in some colors but handle heat and moisture better on exposed or shaded-damp lots.

does composite decking get too hot in Illinois summers?

Dark boards in full sun get hot, like any decking. Lighter colors and capped-polymer lines (like AZEK) stay noticeably cooler. We walk you through color and exposure at the estimate so you're not surprised in July.

how long does a composite deck last?

Manufacturers warrant 25-50 years against fading and staining depending on the line, and the boards don't rot, splinter or need staining. The framing underneath is still wood, which is why proper footings and flashing matter as much as the boards.

see what composite looks like finished

We build with Trex, TimberTech and comparable lines across Naperville and the surrounding suburbs. Take a look at our composite deck builder page for materials, process and warranty details — or get a real number with a free written estimate below.