Warrenville, DuPage County

Deck & Porch Construction in Warrenville

A Warrenville deck that stays level and solid, built on footings below the frost line with posts kept up out of the wet soil.

Warrenville decks start at the footings

We build new decks in treated lumber or composite and repair the ones already standing, from the footings up to the railing caps. A deck is only as steady as what holds it up, so new posts sit on concrete footings dug below the frost line, on metal post bases that keep the end grain off the concrete. Stairs, landings and railings are built to current code. Permits and inspections come with nearly every new deck, and we pull them.

We cover Warrenville off I-88 and Route 59, and Butterfield Road and Winfield Road take us across town. The West Branch of the DuPage River runs through this part of DuPage County, and if your yard sits low or holds water after a storm, that matters for a deck. Wet ground heaves in winter and keeps the bottoms of posts and stair stringers damp most of the year. On a repair we dig around the worst posts to see what they stand on, and on a new build we size the footings and set the stair landing on a pad that stays above the wet spot.

Deck & Porch Construction by ONIT Solutions

What a Warrenville deck job can include

Concrete footings

Holes dug below the frost line and poured so the deck does not heave or settle from one season to the next.

Posts and post bases

Posts set on metal bases above the concrete, so the end grain is not drawing water up from the ground.

Ledger flashed and bolted

Where the deck meets the house, the ledger is flashed and fastened with proper bolts, and an existing ledger that is wrong gets fixed first.

Stairs and landings

Stairs with even risers and a solid landing at the bottom, built to current code with a handrail you can grip.

Treated or composite decking

Treated lumber costs less and needs sealing. Composite costs more up front and needs little upkeep.

Porch steps and columns

Front porch steps, railings and columns rebuilt or repaired to suit the rest of the house.

How we run a Warrenville deck build

The first visit is free: we measure, look at the house wall where the ledger goes and see how the yard drains. You get a written estimate that lists the footings, framing, decking, stairs and railings, along with the permit work. If digging turns up something the estimate did not cover, like an old buried footing in the way, we price it in writing and wait for your okay. The schedule follows the permit approval and the inspection dates, and at the end we walk the finished deck with you.

  • Footings set below the frost line.
  • Posts kept off the dirt on metal bases.
  • Permits and inspections handled by us.
  • A written price before any digging starts.
  • Extra work approved by you in writing first.
  • Site cleaned up at the end of the job.
FAQ

Deck & Porch Construction in Warrenville: questions

Does Warrenville require a permit for a new deck?
Yes. A new deck needs a permit from the city, and so does structural repair work like new posts, joists or a ledger. We draw up what the city asks for, pull the permit and schedule each inspection.
Treated lumber or composite for a Warrenville deck?
Treated lumber costs less up front and needs sealing every few years. Composite costs more and needs little upkeep beyond washing. If you go with wood, staining is a separate service we offer.
When is the best time to build a deck?
We build from spring into fall, and footings can go in as long as the ground is not frozen. Booking early helps with permit timing, and once the permit is in hand the estimate gives you a working-day count.
Can you fix posts that are rotting at the ground?
Usually, yes. We shore up the deck, cut out the bad post, set a new one on a proper base and footing, and check the beam above it. Text a photo to (815) 585-1750 and we can tell you what we are likely looking at.
Do you build decks near Warrenville too?
Yes. We work in Naperville, Wheaton, Lisle and Aurora as well.

More questions and answers ›

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Free estimate

Plan a Warrenville deck from the ground up

Call or text (815) 585-1750 to set up a free on-site estimate, and we will put the whole job in writing, footings to railings.

Call or text (815) 585-1750
Email matt@onitcc.com

Or call or text (815) 585-1750. We reply during business hours.

Call (815) 585-1750Get an Estimate