Residential Plumbers

Oshkosh, WI

Licensed Master Plumber

Lifetime Workmanship Warranty

Free Local Estimates

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Experience the Difference With J. Cox Plumbing

J. Cox Plumbing is a trusted name in the plumbing industry, serving Oshkosh, WI; Neenah, WI; Winneconne, WI; the Fox Valley; and surrounding areas. Our state-licensed and insured master plumbers take immense pride in their work, offering exceptional customer service with a keen focus on time management and efficiency.


We respect our customers and their properties, ensuring a clean and organized work environment during every service call. Our commitment to great communication ensures that homeowners are always in the loop, understanding every step of the process. At J. Cox Plumbing, the homeowner's best interest is our priority, and we strive to deliver solutions that meet their specific needs. To request a free local estimate, please give our residential plumbers in Oshkosh, WI a call today!


Why Choose J. Cox Plumbing?

Choosing J. Cox Plumbing means choosing a team that values your time, your property, and your peace of mind. We are committed to providing clean, efficient, and professional service, with a focus on excellent customer communication.


Our dedicated team is not just skilled, but also respectful and considerate of your needs. We always have your best interest in mind, and our services are designed to bring you the most value. Receive a lifetime workmanship warranty and price matching options with written competitor estimates when you contact our team of residential plumbers in Oshkosh, WI today.

Price Matching Available

Family-Owned Business

Lifetime Workmanship Warranty

Free Local Estimates

Over 15 Years of Experience

State Licensed and Insured Master Plumber

Backflow Protection License

Excellent Time Management

Clean, Efficient, and Professional Service

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Here's what our satisfied customers are saying...

At J. Cox Plumbing, we take pride in providing exceptional plumbing services to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of J. Cox Plumbing and let others know what you think.

  • What specific home plumbing services can your team handle?

    We offer comprehensive plumbing solutions engineered to address everything from minor daily nuisances to major, complex system overhauls. No job is too small or too complex for our crew, and we treat every single service call with the same level of urgency, professionalism, and care. When local families look for versatile, highly skilled residential plumbers in Oshkosh, WI, they count on us for a wide range of specialized services:

    • General repairs and diagnostics:  Stopping annoying dripping faucets, rebuilding running toilets, replacing faulty shut-off valves, and tracking down mystery water drops before they destroy your ceilings.
    • Piping systems and repiping:  Full structural pipe installation, electronic leak detection, and complete house upgrades from corroded galvanized or brittle polybutylene pipes to modern, freeze-resistant PEX or durable copper.
    • Fixture repairs and aesthetic upgrades:  Modernizing worn sinks, showers, tubs, and luxury hardware in your kitchen and bathrooms to instantly improve daily function and property value.
    • Water heaters (traditional and tankless):  Rapid diagnostics, element replacement, and energy-efficient installations. Whether you need a standard gas/electric tank unit or want to upgrade to a continuous, space-saving tankless system, we have you covered.
    • Advanced drain cleaning:  High-performance mechanical augering and hydro-jetting to clear out stubborn grease, soap scum, hair buildup, and invasive tree roots, getting your waste lines flowing perfectly.
    • Remodeling and utility updates:  Rerouting lines for dishwasher installations, refrigerator ice makers, gas range connections, and complete structural bathroom or kitchen layout reconfigurations.
  • Are you available to assist with sudden, stressful plumbing emergencies?

    Yes. Plumbing failures don't wait for a convenient time to occur-they frequently strike at 2:00 AM on a Tuesday, right before you leave for work, or right in the middle of a major holiday dinner. A burst pipe, a failing sump pump during a heavy Midwest downpour, a leaking water heater, or a major sewage backup can quickly flood your living space and cause thousands of dollars in structural damage if it isn't mitigated immediately. Our emergency dispatch team is trained to act fast. When you call us, we don't just put you on a long waiting list; we provide clear, immediate instructions on how to shut off your main water valve to minimize damage while we mobilize a fully stocked service truck to your property. This unwavering reliability under pressure is a key reason families rely on us as their premier choice when vetting residential plumbers in Oshkosh, WI.

  • What geographic areas do you serve, and why does your local experience matter?

    We are proudly locally owned, operated, and deeply connected to the communities we serve. While our operational hub is rooted right here in Oshkosh, our daily service vans cover the surrounding regional neighborhoods and Fox Valley communities.


    This deep local footprint gives us a massive technical advantage over out-of-state corporate franchises:

    • Infrastructure knowledge:  We know the local home construction styles, from historic properties near the lake to modern developments, meaning we know exactly what kind of pipe configurations to expect behind your walls.
    • Climate expertise:  We are intimately familiar with the unique, brutal challenges that the freezing Wisconsin winters place on residential plumbing. We know exactly how deep lines must be buried to stay below the frost line and how to properly insulate vulnerable rim-joist pipes to prevent catastrophic winter freezes.
    • Water profile insights:  We understand the local municipal water and private well profiles, allowing us to recommend the exact water softeners and filtration systems needed to prevent hard water minerals from eating away at your appliances.

    Choosing us means you aren't just calling a random corporate call center; you are reaching out to neighborly, dedicated residential plumbers in Oshkosh, WI who care about your property as much as you do.

  • How do you ensure the quality of your repairs instead of just offering a temporary "quick fix"?

    Our company has built its reputation on delivering long-lasting, structurally sound results. We invest heavily in modern diagnostic tools-including high-resolution fiber-optic drain cameras-to view the inside of your sewer lines and pinpoint the exact root cause of your plumbing failures. When we perform a repair, we utilize only premium, trade-grade materials, such as heavy-duty solid brass fittings, commercial-grade sealants, and PEX-A piping, which offer superior durability and flexibility compared to cheap big-box retail alternatives. Many local families call us again and again because they know that when they hire us as their residential plumbers in Oshkosh, WI, they're securing a reliable, permanent solution that stands the test of time.

  • Is preventive plumbing maintenance actually worth it, or should I just wait until something breaks?

    Waiting for a major plumbing issue to occur can be stressful and expensive. Regular maintenance helps prevent costly problems by identifying hidden leaks, corroded water heater elements, and slow drains before they require major repairs. Our residential plumbers in Oshkosh, WI encourage homeowners to view routine inspections as a smart investment in their home's long-term health.

  • What sets J. Cox Plumbing apart from other plumbing contractors?

    Plumbing technology and methods are constantly evolving, and we stay on the leading edge of those changes to give our customers the absolute best service possible. Our commitment to continuous growth and learning means that no matter how the industry changes, families can trust us to provide solutions that are effective, modern, and highly reliable. When someone needs top-tier residential plumbers in Oshkosh, WI, we stand fully prepared to meet their needs today, tomorrow, and for years to come.

Learn More About

J. Cox Plumbing

Serving the Oshkosh, WI area. J. Cox Plumbing specializes in water heater, water quality, plumbing repair, remodeling, and new construction plumbing services. Price matching available. Lifetime workmanship warranty. Over 15 years of experience. Call for a free local estimate.

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