New Construction & Remodeling Plumbing in Southeast Wisconsin

Building or Remodeling? Get the Plumbing Designed and Installed Right the First Time

Plumbing is the one system in a new home you truly cannot afford to get wrong — it's inside the walls, under the slab, and behind the finished surfaces where mistakes cost the most to fix. O'Leary Plumbing, Heating & Electrical has installed plumbing for new home construction, remodels, additions, and light commercial projects across Southeast Wisconsin since 1958. Whether you're a contractor or a homeowner overseeing your own project, mail or drop off your blueprints and we'll prepare a free estimate and walk through it with you line by line.

What Construction Plumbing Services Do We Provide?

Our crews handle the full scope of rough-in and finish plumbing: water supply lines, drain-waste-vent systems, water heater installation, gas piping, and complete fixture setting. That covers new home construction from the first stub-out to the final faucet, whole-home remodels, kitchen and bathroom renovations, basement finishes that add a bathroom or wet bar, and light commercial buildouts.

We're equally comfortable working from an architect's full mechanical drawings or helping a homeowner turn a rough sketch into a code-compliant plan. And because our company also handles heating, cooling, and electrical work, we can coordinate all the mechanical trades on your project under one roof — fewer subcontractors to schedule, and no gaps between scopes for problems to hide in.

Why Does Rough-In Quality Matter So Much?

Because everything that comes later depends on it. Supply lines that are properly sized deliver steady pressure even when two showers and the dishwasher run at once. Drains that are correctly pitched and vented drain fast and stay quiet. Cleanouts placed thoughtfully make every future service call faster and cheaper. We sweat these details during rough-in because we're also the company homeowners call twenty years later — we've seen exactly how shortcuts buried in a wall in one decade turn into pipe repair and repiping jobs in the next. We build so that call never has to happen.

Every installation meets the Wisconsin Uniform Plumbing Code, and we handle permits and inspections as part of the job. Our work is led by a Master Plumber, and every technician on your project is licensed, bonded, and insured.

Which Fixtures Should You Choose for a Remodel?

The bathroom is one of the busiest rooms in the house, and a remodel is your chance to make it both more luxurious and less expensive to run. Modern water-conserving fixtures have come a long way: today's low-flow toilets, showerheads, and faucets perform beautifully while cutting water use dramatically. Lower water bills, less demand on your water heater, and eligibility for rebates in some communities — the benefits stack up. By saving water with smart fixture choices, many of our customers find room in the budget for the custom shower or soaking tub they really wanted.

We help you select fixtures that fit your design, your water conditions, and your budget — we've long recommended water-saving lines from quality manufacturers like Kohler — and our fixture and faucet installation team sets everything with the care the finished room deserves.

What About Water Quality in a New Build?

Southeast Wisconsin's water is famously hard, and a new construction project is the ideal moment to deal with it — before scale ever touches your new fixtures, appliances, and water heater. We can rough in and install water softening and filtration equipment as part of the build, sized to your household and plumbed in cleanly rather than retrofitted into a crowded utility room later. Your new plumbing stays new longer, and everything downstream of the softener — from the shower glass to the dishwasher — is easier to live with.

Why Choose O'Leary for Your Project?

Since 1958, three generations of our family have built this company on construction plumbing done right. Builders bring us back project after project because our rough-ins pass inspection cleanly, our crews keep to schedule, and our finish work looks as good as it functions. Homeowners choose us because we take the time to understand what you're building and why — and because we'll still be here, a phone call away, for as long as you own the home. We get the work done right the first time, without cutting corners.

Frequently Asked Questions About Construction Plumbing

Do you work with homeowners acting as their own general contractor?

Yes, and we've done it for decades. Bring us your blueprints — mail them, drop them off, or send them digitally — and we'll prepare a free estimate and walk you through the plumbing scope in plain language: what happens at rough-in, what happens at finish, and where the inspection points fall.

Do you pull the plumbing permits?

We handle permits and inspections as part of the job. Every installation is built to the Wisconsin Uniform Plumbing Code, and our long relationships with area inspectors keep projects moving without surprises.

Can you move plumbing during a kitchen or bathroom remodel?

Yes. Relocating a sink, adding an island with plumbing, moving a shower drain, or adding a basement bathroom are all routine work for our crews. The key is planning the drain and vent routing before demolition starts, which is exactly what your estimate visit is for.

Should I replace old supply lines during a remodel?

If the walls are open, it's the cheapest moment you'll ever have to address aging galvanized or failing polybutylene lines. We'll assess what's exposed during the project and give you a straight recommendation — replace now while access is free, or leave it with a clear picture of remaining life.

Get a Free Estimate on Your Construction Plumbing

Ready to talk through your project? Mail or drop off your blueprints, contact us online, or call O'Leary Plumbing, Heating & Electrical at (262) 642-7747 for a free estimate on new construction or remodeling plumbing anywhere in Southeast Wisconsin.