McDermott Construction has been building and remodeling homes and businesses across the Quad Cities since 1978. Honest work, fair prices, and craftsmanship that lasts.
McDermott Construction began in 1978 when Peter McDermott — a Quad City Area native born and raised right here in Moline — set out on his own with a strong back, a good name, and a deck to build.
More than four decades later, the business Peter started still calls Moline home. We've grown through decades of loyal customers, honest prices, and the kind of work ethic that earns repeat business year after year. No shortcuts. No surprises. Just results.
From modest residential decks to full commercial buildouts, our reputation is our most valuable tool — and we protect it on every job site.
Fair, transparent estimates. What we quote is what you pay.
Born and raised in Moline. We're your neighbors — not a franchise.
40+ years of projects that still look great today.
Our repeat business speaks louder than any advertisement.
From a new deck to a full commercial renovation — if it involves construction in the Quad Cities, we do it right.
Custom decks built to last — from simple pressure-treated platforms to multi-level composite systems with built-in seating and railings.
Extend your living space and enjoy the outdoors year-round with beautifully designed season room additions tailored to your home.
Full kitchen transformations — from new cabinets and countertops to complete layout changes, on time and on budget.
Need more space? We design and build seamless additions that match your existing home's style while dramatically expanding your square footage.
Custom awnings that add curb appeal, protect your investment, and make outdoor spaces more comfortable all season long.
From office build-outs to specialty structures like ticket booths and warehouses, we handle commercial work with the same care as residential.
Storm damage, outdated layouts, or ready for a change — we rebuild and remodel residential and commercial properties with care and skill.
Drafty windows, failing seals, or simply ready for an upgrade? We install energy-efficient replacement windows for homes and businesses — improving comfort, curb appeal, and energy bills.
Learn More →Every project starts with a free, no-pressure on-site estimate. Pete will come out, take a look, and give you a straight answer.
Get a Free QuoteWe make the construction process as smooth as possible for every customer.
Reach out by phone at (309) 314-4847 or fill out our contact form with details about your project.
Peter or a crew member will visit your property, assess the scope, and give you a transparent, no-obligation estimate.
Once you approve the plan, we schedule and execute — showing up on time, working hard, and keeping you in the loop.
We don't consider a job done until you're fully satisfied. We stand behind our work — that's the McDermott way.
Real projects built right here in the Quad Cities. Click any photo to enlarge.
"Peter and his crew built our deck three years ago and it still looks brand new. Fair price, great communication, showed up when they said they would. That's rare these days."
"We hired McDermott for a room addition and couldn't be happier. The guys were professional, cleaned up after themselves every day, and the work is flawless."
"I've used McDermott Construction twice — once for a kitchen remodel and again for our three-season room. They're the only contractor I'll ever call."
Straight answers about working with McDermott Construction.
We serve the full Quad Cities metro — Moline, Rock Island, East Moline, Milan, Silvis, Coal Valley, and Port Byron in Illinois, plus Davenport and Bettendorf in Iowa. We travel up to 50 miles from our Moline base for qualifying projects. Not sure if you're in range? Just call and ask — chances are, we come to you.
Yes — completely free, no-obligation, on-site estimates for every project. Peter or a crew member will come to your property, assess the scope, and give you a straight number. What we quote is what you pay. No hidden fees, no surprises.
Fully licensed and insured in Illinois. We've been operating since 1978 and have never had a lapse in coverage. You can hire us with complete confidence that your home and your project are protected.
Deck pricing in our area typically ranges from $8,000–$15,000 for a straightforward pressure-treated platform, and $15,000–$40,000+ for composite, multi-level, or custom-built decks with features like built-in seating or pergola structures. The only way to get an accurate number is a site visit — and ours are always free.
Three season rooms typically run $20,000–$45,000 in our market, depending on size and finish. Four season rooms — fully insulated and climate-controlled — typically run $40,000–$80,000+. We'll come out, measure your space, and give you a number that fits your budget and your goals.
Yes. We install and replace windows for both residential and commercial properties across the Quad Cities. Whether you need a single drafty window replaced or a full-home window upgrade, we handle it from start to finish — including trim, insulation, and caulking. See our Windows service page →
McDermott Construction was founded in 1978 by Peter McDermott, a Moline native. We've been continuously operating for over 46 years — entirely locally owned, with no franchise or corporate involvement. Our reputation is our most valuable asset, and we protect it on every single job.
We serve residential and commercial customers within a 50-mile radius of Moline, IL — covering the full Quad Cities metro and surrounding communities.
Ready to get started? Fill out the form or give us a call. We'll schedule a free on-site estimate at a time that works for you.
Call us today or request a free estimate online. We'll come to you, see your space, and give you a straight answer.