24/7 Plumbing Services in Cornelius, OR | Licensed Plumbers

Selecting a licensed plumber in Cornelius, OR means verifying contractor qualifications, field experience, service reputation, and the ability to handle everything from routine inspections to urgent emergency repairs. With 40+ years of plumbing experience, M T Dunn Plumbing serves Cornelius homeowners and businesses, delivering expert plumbing solutions that meet Oregon Plumbing Specialty Code standards, with straightforward pricing, no hidden costs, and around-the-clock emergency availability.

Free Plumbing Consultation

Our highly experienced plumbing professionals will contact you for a free estimate and consultation.

Who Is M T Dunn Plumbing?

M T Dunn Plumbing is a licensed, bonded, and insured plumbing contractor headquartered in Hillsboro, OR, serving residential and commercial customers throughout Hillsboro, Cornelius, and the broader Washington County region. With 40+ years of hands-on plumbing experience, our technicians handle everything from sewer line repairs and water heater installations to full system replacements and bathroom remodels. Every job is performed in compliance with Oregon Plumbing Specialty Code, backed by upfront pricing and no hidden fees.

What Cornelius Clients Say

M T Dunn Plumbing has built a strong reputation for technical skill, reliable scheduling, and outstanding service throughout Cornelius and Washington County. Property owners and businesses consistently highlight our team’s attention to detail, clear communication, and commitment to delivering durable, code-compliant results on every call.

Google Reviews

      EXCELLENT  
   Based on 95 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Ruben 
 
 
 
 Trustindex verifies that the original source of the review is Google. Late Sunday night we had an emergency leak, where we were forced to shut off water to entire house. I reach out MT Dunn plumbing and in a short notice and within 35 mins Irich was able to come over and fixed our leak. Truly appreciate the quick response especially being late Sunday night around 9-10pm!!!
  
 
      Posted on Google  
   
   Matt Corrado 
 
 
 
 Trustindex verifies that the original source of the review is Google. We inadvertently discovered our kitchen and washing machine drains were disconnected and dumping water underneath the house, in the crawlspace. We may never know why or for how long but Irich responded to my call personally and set a date within a single business day knowing we'd couldn't use the kitchen until it was fixed. He was here on time and had it repaired in a half day. Proper invoicing and estimates based on labor and parts always makes me happy. So glad to have a plumber now. I won't go anywhere else.
  
 
      Posted on Google  
   
   Nick A. 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have used MT Dunn many times, mostly smaller projects.  Usually available within 24-48 hours.  Always professional and courteous.  Wouldn’t hesitate to use them again!
  
 
      Posted on Google  
   
   M 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service start to finish. Arrived on time, responded quickly to request. Very friendly and professional. Everything handled with care and expertise.
Shower head repair.
Hillsboro Area.
  
 
      Posted on Google  
   
   Zari Mootz 
 
 
 
 Trustindex verifies that the original source of the review is Google. This is the 3rd time we've used M T Dunn Plumbing, and the 3rd time we've have a 5-star experience. I would recommend them to everyone!
  
 
      Posted on Google  
   
   Rie Jacobs 
 
 
 
 Trustindex verifies that the original source of the review is Google. Irich is very easy to work with and always shows up on time. He’s honest, professional, and very efficient. His work is fast but never rushed. He does things the right way and never cuts corners.

Over the past three years, he has helped us three times: installing a water heater, replacing some toilet parts, and installing a new toilet. Every job was done quickly and professionally.

He’s also very respectful of our home and keeps things clean while working. On top of that, he’s a genuinely kind person—even great with our dog 🐶 His pricing is fair and he never overcharges.

It’s hard to find someone this trustworthy. I highly recommend him. Thank you Irich!
  
 
      Posted on Google  
   
   Brian Secrest 
 
 
 
 Trustindex verifies that the original source of the review is Google. I've had MT Dunn plumbing handle a couple of plumbing issues we've had over the last few years.  Our most recent visit was due to a leaking valve going to our guest bathroom toilet.  It was stripped and Irich was able to fix it in short order.  Friendly, transparent, punctual, and knowledgeable.  We highly recommend Dunn plumbing and Mikes son Irich.
  
 
      Posted on Google  
   
   Cooper Howard 
 
 
 
 Trustindex verifies that the original source of the review is Google. This is the second time I’ve used M T Dunn Plumbing and both experiences have been great. I recently discovered I had a leaky pipe underneath my cement driveway. M T Dunn came out and assessed the situation and gave me multiple ways get it fixed with varying costs. I decided what I wanted to do and they came out a few days later and took care of it. They cut a hole in the cement, found the leak, fixed it and patched the driveway in a single day which will end up saving me a ton of money. They’re very fair and have gotten things done quickly and easily both times I’ve needed them.
  
 
      Posted on Google  
   
   philip salvador 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very upfront on pricing, finished the work as expected.
  
 
      Posted on Google  
   
   Daniel Cruz 
 
 
 
 Trustindex verifies that the original source of the review is Google. Irich is great and excellent work and did same day service..I would highly recommend mt plumbing for anyone