New Deck Construction in IL

A new deck is the cheapest room you will ever add to your house, and the one you will use most from April to October. Osnova Construction designs and builds custom decks across DuPage and Kane counties, from Glendale Heights out to Naperville, Wheaton, Aurora and St. Charles: composite, PVC and natural wood, sized to your yard and built to pass inspection the first time.

Book a free on-site consultation and you leave it with three things: a scaled drawing of the deck, an itemized price with the permit and every bracket on it, and board samples in your hand. No deposit to get the number. Request a free estimate.

Why homeowners here book Osnova

• Deck construction is what we do, not a side line for a general handyman. See the Naperville, Aurora and West Chicago decks in our projects.
• Licensed and insured in Illinois, with a written workmanship warranty on top of the manufacturer's.
• Our own crew, start to finish. The people who dig the first footing are the people who hand you the warranty.
• Permits and inspections handled in every village we work in, so you never stand in a line at the building department.
• Most decks are booked within a couple of weeks of the signed proposal and finished in one to three on site.

Choose your deck

Each page below goes deep on one decision. If you are not sure which one you are making, start with a free consultation and we will tell you.

• Composite decks: TimberTech, Trex and Fiberon, the material most of our clients choose and the one that shrugs off Illinois winters.
• Wood & cedar decks: pressure-treated pine, cedar and hardwoods, for the look of real wood and a lower first cost.
• Deck replacement: the old deck comes out, a new one goes up on proper footings, usually inside two weeks.
• Pergolas & covered decks: shade and shelter built into the deck rather than bolted on later.
• Railings installation: composite, aluminum, glass and cable, on a new deck or an existing one.

Ground-level and patio decks

Not every deck needs stairs and a railing. A ground-level deck sits under 30 inches off grade, which in most DuPage villages means no guardrail and a simpler permit. We build them over tired concrete patios, off sliding doors that open onto lawn, and around above-ground pools. The framing still sits on footings below frost depth; the platform decks that skip that step are the ones that are crooked by their second spring.

What goes into a deck that lasts here

• Footings at 42 inches. Northern Illinois frost reaches deep enough to lift a shallow pier several inches a year. Ours go below it, on poured concrete, inspected before the frame goes on.
• A ledger that is flashed, not just bolted. The board that ties the deck to the house is where most deck failures start. We flash it, bolt it through the rim joist and leave a gap for water to get out.
• Joists sized for snow. A deck here carries a winter's snow on top of summer furniture. We frame to the load, not the minimum.
• Hidden fasteners on composite, stainless on wood. The screws you cannot see are the ones that will not rust-streak the boards.

How a new deck goes with Osnova

1. Consultation. We come out, measure, talk through how you actually want to use the space, and bring boards and railing samples. About an hour.
2. Drawing and proposal. A scaled plan and a line-by-line price: materials, labor, permit, timeline.
3. Permit. We file with your village (Glendale Heights, Wheaton, Naperville and the rest all inspect footings and framing) and schedule the inspections.
4. Build. Footings, frame, decking, stairs, railing. Most decks take one to three weeks on site; multi-level builds run longer.
5. Walk-through. Every punch-list item closed before final payment, then the written warranty and the manufacturer registrations.

Features worth planning in from the start

Multi-level decks and step-downs, built-in benches and planters, low-voltage stair and post-cap lighting, privacy walls, grill stations, and hot-tub reinforcement all cost far less on the drawing than as an afterthought. Bring the wish list to the consultation.

Two ways to start

If you already know roughly what you want, Request a free estimate and we will bring the samples and the tape measure. If you are still deciding, Send us a photo of the back of the house and a sentence about how you want to use the space, and we will reply with a first opinion on layout and material before anyone drives out.