North Metro Plumbing
“I was referred to North Metro Plumbing to fix a tankless water heater job that was done by another plumber who by the way left everything incorrect and unsafe/dangerously for my family.”
Best Plumbers in Thornton, CO
24 contractors listed · 11 in Thornton · 9 open 24/7 · 17 open weekends · 21 rated 4.5+
Data verified October 27, 2026
Impact Heating & Cooling Inc.
“Herb was great - he clearly knew his way around the furnace and was great at sharing and educating me about how the various parts work, the error codes, and the system as a whole.”
Royal Services
“The plumber and his assistant took their time to fully understand my priorities and offered various suggested solutions making it possible for a reasonably priced solution to be reached.”
Jim Needham Heating Cooling Plumbing and Drain
“He answered all the questions I had and helped me find the best option for me when it came to my garbage disposal I highly recommend him and Jim Needham Plumbing!”
To the T Plumbing & Heating
“He informed me of their comprehensive care plan which I'm hesitant to share with others since that'll make him more busy, but it's a great plan which alleviates lots of worries from me as a homeowner.”
Amazing Plumbing Solutions LLC
“Although I didn't “use” their services this time I have saved their number to use the for future plumbing needs because of their exceptional customer service.”
Listed for homeowners in and around Thornton, CO, these 24 companies cover plumbing work. Hours, license claims and free estimate offers come from each company's own website, so confirm them on the phone before you agree to a visit for something already running.
Area overview: Thornton, CO
Of the 24 contractors we list here, 11 are in Thornton itself and 13 come from towns including Denver (5, 11 mi), Arvada (3, 13 mi) and Commerce City (2, 7 mi). The contractors on this page are rated from 4.1 to 5.0 across 9,662 reviews; 18 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (93%), quality (85%) and responsiveness (83%). 9 are open around the clock; 17 are open on Saturdays and 13 on Sundays. The services the contractors on this page list most often on their websites are drain cleaning (5), water heaters (4), sewer repair (3), plumbing repairs (2) and water heater service (2). 7 show a license on their websites; 1 lists staff certifications (NATE) and 13 have a BBB rating of A or A+. 15 have ten or more years of experience, the longest 39 years. 10 offer emergency call-outs; 11 offer financing or payment plans; 8 give free estimates; 7 are family- or locally-owned and 13 list coupons or special offers. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
How many listed plumbers say they are licensed?
7 of the 24 plumbing listings here show a license on their websites. Ask for the number, take it to the board that issued it and confirm it is current and actually covers plumbing. A company that does not say so may still hold a license, so ask on the phone and write the number down.
Steadfast Plumbing
“Tonya completed all of my Xcel Energy paperwork so I could receive my rebates quickly and explained everything to me, including the new settings on the hot water heater.”
Plumbing Connect Systems LLC
“After doing some pricing comparison, which included some quotes from the bigger plumbing companies in the area, Antonio offered the most affordable and comprehensive water heater installation/replacement service.”
Jet Eye Drain Cleaning and Sewer Inspections
“Anthony was knowledgeable, respectful and great to work with, based on this experience I would DEFFINETELY recommend these guys to my friends and family.”
Denver Mechanical Contracting
“I have an old steam heating system in my Denver townhome and have struggled over the years to find a company that is knowledgeable about about radiant heat.”
Royal Rooter & Drains
“(I'm no plumber) I ended up having them install a garbage disposal to eliminate the issue moving forward, however he was more than happy to leave it at clearing the blockage.”
303 Master Plumbing
“Excellent friendly service at a reasonable price would definitely recommend”
Elite Plumbing Services
“These men explained exactly what had happened and how to prevent it in the future, the team was incredibly responsive, and they'll be my first call next time I need a great plumber!”
Mighty Plumbing and Heating LLC
“Faucets were installed but the plumber bent the kitchen sink and I had to call a different company to come out and stabilize the kitchen sink in addition to the fixing the bathroom faucet drain that was overly tightened and damaged during install .”
Go Direct Services
“As a family (with a 6,4,& 2 year old) that was homeless for 402 days and moved to 35 places because of toxic mold, we are extremely nervous when it comes to anything with water.”
Time Plumbing
“Nick ran 100 feet of his snake through our drain plumbing, cleaned the drain with a special grease cutting cleaner and restored all our drains to ”like new” performance.”
Day & Night Mechanical Solutions
“I seldom write reviews, but this installation keeps our home at 72 degrees and the heat pump keeps heating even at these low temperatures and at our elevation.”
Afford-a-Rooter Plumbing Services
“I had mention something to him about us getting a new washer and dryer and that I found a small leak to the washer which he looked at and fixed for us at no extra charge!”
Flatirons Plumbing
“I then called Flatiron and within an hour Michael came out and determined my problem and with a co-worker assisting, we were up and going by 5 that evening.”
My Denver Plumber
“Recommend by my neighbor who was also having work done so I called to have them replace my main shut off valve while water was shut off to our building, Jim was great and got the job done in a timely manner and was less expensive than quoted.”
Ultimate Heating
“Kelly - from Ultimate Heating, Cooling, Plumbing & Electrical did a wonderful iob diagnosing our problem and even told us that this issue should be under warranty to save us money on the fix.”
Plumb Pros Inc
“They redid the plumbing to the sink, made sure that it would drain better than it was before, and worked with me to get a new fixture installed that would be both cost effective and visually beautiful.”
Payless Rooter
“I was worried at first that they were just a middle man, but the truth is they have all the contacts you could need to solve your plumbing issue and do so fast and affordably”
Rooterguy Llc
“I don't think I've ever been happy after a plumber visit…Gordon and his son, Jozia, were fast (got here within an HR of our call), quickly diagnosed, and then fixed our problem for a VERY REASONABLE price!”
Why these companies made our list
What customers say about contractors in Thornton
- “Casey with Amazing Plumbing was at my home 35 minutes after submitting the request and got all of my problems handled in a timely and professional fashion.” — customer of Amazing Plumbing Solutions LLC
- “Paul was very personable, professional, and reasonable. I will recommend him to anyone that asks if I know a plumber.” — customer of North Metro Plumbing
- “Antonio was super nice and professional. He helped with my emergency issue and got it fixed the same day.” — customer of Plumbing Connect Systems LLC
- “Great communication. We appreciated the same-day response to evaluate our leaking water heater and discuss our options.” — customer of Steadfast Plumbing
- “They installed a new faucet. Work was completed in a timely manner and very professional.” — customer of Amazing Plumbing Solutions LLC
Excerpts from public reviews of the contractors listed on this page.
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