
Get matched with top septic tank pros in Thornton, CO
There are 8 highly-rated local septic tank pros.
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TRUSTED BY THORNTON, CO HOMEOWNERS
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Verified Reviews for Septic Tank Service pros in Thornton, CO
*The Angi rating for Septic Tank Service companies in Thornton, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.
*The HomeAdvisor rating for Septic Tank Service companies in Thornton, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.
Last update on October 05, 2025
Find Septic tank pros in Thornton

Heart Heating, Cooling, Plumbing & Electric
Heart Heating, Cooling, Plumbing & Electric
Heart Heating, Cooling, Plumbing & Electric provides the highest quality service for all your Furnaces, Air Conditioner, Boilers, Water Heaters, plumbing, and electrical systems. We utilize the latest technology to save our customers time and money, including tablet-based systems with "Uber Style" tracking of your technician and "Up Front" pricing so there are never any surprises. Our staff is licensed, insured, background checked, drug tested, and in a company uniform and vehicle for your safety and peace of mind. We are a veteran-owned company.
"Seneca Trujillo came out to give us a price quote on electrical work in our garage for an EV. He was professional, honest, straightforward and explained everything clearly. He took the time to answer all of my questions and concerns and gave a fair and transparent estimate without upselling unnecessary work. It's refreshing to meet someone who is trustworthy and puts integrity first. He definitely deserves a raise for the way he represents Heart Heating, Cooling, Plumbing and Electric."
Joe V on July 2025
Heart Heating, Cooling, Plumbing & Electric provides the highest quality service for all your Furnaces, Air Conditioner, Boilers, Water Heaters, plumbing, and electrical systems. We utilize the latest technology to save our customers time and money, including tablet-based systems with "Uber Style" tracking of your technician and "Up Front" pricing so there are never any surprises. Our staff is licensed, insured, background checked, drug tested, and in a company uniform and vehicle for your safety and peace of mind. We are a veteran-owned company.
"Seneca Trujillo came out to give us a price quote on electrical work in our garage for an EV. He was professional, honest, straightforward and explained everything clearly. He took the time to answer all of my questions and concerns and gave a fair and transparent estimate without upselling unnecessary work. It's refreshing to meet someone who is trustworthy and puts integrity first. He definitely deserves a raise for the way he represents Heart Heating, Cooling, Plumbing and Electric."
Joe V on July 2025

All American Drain Cleaning
All American Drain Cleaning
Looking for reliable drain cleaning and sewer repair services in Denver? Look no further! All American Drain Cleaning is here to help. Our experienced team is dedicated to providing top-notch service to homeowners in the Denver Metro area. Contact us today for all your drain cleaning needs.
"This company has been our "go to" business for all of our plumbing issues for years, and just yesterday (July 16) they replaced 10 feet of our sewer line. The crew was extremely gracious, worked well as a team, and took extra care to not damage our backyard. And when the job was done, they took more time to restore our landscaping so that you can't even tell a backhoe was in our backyard! My wife and I highly recommend this company!"
Tim B on July 2025
Looking for reliable drain cleaning and sewer repair services in Denver? Look no further! All American Drain Cleaning is here to help. Our experienced team is dedicated to providing top-notch service to homeowners in the Denver Metro area. Contact us today for all your drain cleaning needs.
"This company has been our "go to" business for all of our plumbing issues for years, and just yesterday (July 16) they replaced 10 feet of our sewer line. The crew was extremely gracious, worked well as a team, and took extra care to not damage our backyard. And when the job was done, they took more time to restore our landscaping so that you can't even tell a backhoe was in our backyard! My wife and I highly recommend this company!"
Tim B on July 2025

Lion Home Service
Lion Home Service
Lion Home Service is setting a new standard of excellence in the industry. We specialize in prompt service, quality fixes, and a reliable response that you can trust. We take pride in our reputation and have built our business one satisfied customer at a time. Whether you need an emergency repair, regular maintenance, or have a project you are planning, we are your total home solution. Service Delivered With Pride! Heating, Cooling, Electrical, Plumbing, Drain Cleaning, Septic, Roofing, Gutters, Indoor Air Quality and MORE! Look for the Home Service company offering the best service and guarantees to ensure your repair or service is done correctly the first time! 100% SATISFACTION GUARANTEE- We agree to accept responsibility for your complete satisfaction with the materials we use and the workmanship we provide. During the first year, if you are dissatisfied with our service or our people for any reason, we will do whatever it takes to make it right and correct the problem to your satisfaction. Additional Guarantees- We Value Your Safety- No Blame Game-We Value Your Time-Apples to Apples -Workmanship
"DO NOT USE THIS COMPANY. Please look at the YELP or BBB complaints, they are much more akin to what I experienced. They are certainly manipulating the Google reviews. I hired Lion to do a simple cleaning/certifying of our HVAC units as part of a sale. I was initially quoted $119, and I verified no less than 3 times with the customer service rep that the price would include cleaning and testing. When our tech showed up, he said we were misquoted and the charge for cleaning and testing would be about $450, as it was part of their "maintenance" package. They very reluctantly cut us a "deal" for just over $300. Not only was zero cleaning done, the tech did not perform a single action that could be classified as "maintenance." What we got was a diagnostic and estimate for repairs and replacement. I called to complain twice before someone finally got back to me. I was told that the tech didn't perform the cleaning because it may have damaged the unit, which was clearly a lie because the tech never told me that and actually gave me a quote to perform the AC coil cleaning, $470 (what a deal!). The rep then told me that a simple cleaning was done, but not the deep clean that I was expecting. I asked that my invoice be revised to reflect that, but was quickly blocked. Yes, they actually blocked my number after repeatedly misrepresenting both the price and work. I was shocked. I filed a complaint with the BBB, of which I discovered there are many. Hopefully they do the right thing and just give me a refund, but I won't hold my breath. Again, they are clearly manipulating their reviews on Google. Customers do your research!"
Dylan N on May 2025
Lion Home Service is setting a new standard of excellence in the industry. We specialize in prompt service, quality fixes, and a reliable response that you can trust. We take pride in our reputation and have built our business one satisfied customer at a time. Whether you need an emergency repair, regular maintenance, or have a project you are planning, we are your total home solution. Service Delivered With Pride! Heating, Cooling, Electrical, Plumbing, Drain Cleaning, Septic, Roofing, Gutters, Indoor Air Quality and MORE! Look for the Home Service company offering the best service and guarantees to ensure your repair or service is done correctly the first time! 100% SATISFACTION GUARANTEE- We agree to accept responsibility for your complete satisfaction with the materials we use and the workmanship we provide. During the first year, if you are dissatisfied with our service or our people for any reason, we will do whatever it takes to make it right and correct the problem to your satisfaction. Additional Guarantees- We Value Your Safety- No Blame Game-We Value Your Time-Apples to Apples -Workmanship
"DO NOT USE THIS COMPANY. Please look at the YELP or BBB complaints, they are much more akin to what I experienced. They are certainly manipulating the Google reviews. I hired Lion to do a simple cleaning/certifying of our HVAC units as part of a sale. I was initially quoted $119, and I verified no less than 3 times with the customer service rep that the price would include cleaning and testing. When our tech showed up, he said we were misquoted and the charge for cleaning and testing would be about $450, as it was part of their "maintenance" package. They very reluctantly cut us a "deal" for just over $300. Not only was zero cleaning done, the tech did not perform a single action that could be classified as "maintenance." What we got was a diagnostic and estimate for repairs and replacement. I called to complain twice before someone finally got back to me. I was told that the tech didn't perform the cleaning because it may have damaged the unit, which was clearly a lie because the tech never told me that and actually gave me a quote to perform the AC coil cleaning, $470 (what a deal!). The rep then told me that a simple cleaning was done, but not the deep clean that I was expecting. I asked that my invoice be revised to reflect that, but was quickly blocked. Yes, they actually blocked my number after repeatedly misrepresenting both the price and work. I was shocked. I filed a complaint with the BBB, of which I discovered there are many. Hopefully they do the right thing and just give me a refund, but I won't hold my breath. Again, they are clearly manipulating their reviews on Google. Customers do your research!"
Dylan N on May 2025

Afford-A-Rooter
Afford-A-Rooter
Locally owned plumbing company offering quality plumbing and drain cleaning at an affordable price. Second generation plumber serving families and businesses in the Denver metro area. Master Plumber's License, Colorado State Plumbing Contractors License, fully insured. Member BBB with "A" Rating. Available 24/7.
"Jason Dodge did a great job. Not only did he snake the drain in no time at all but he noticed the hot and cold water were reversed on my sink faucet and in 3 minutes he corrected it no charge! He couldn't have been nicer. I was only charged $100. for the whole thing. they have definitely become my go-to plumber!"
Carol B on November 2020
Locally owned plumbing company offering quality plumbing and drain cleaning at an affordable price. Second generation plumber serving families and businesses in the Denver metro area. Master Plumber's License, Colorado State Plumbing Contractors License, fully insured. Member BBB with "A" Rating. Available 24/7.
"Jason Dodge did a great job. Not only did he snake the drain in no time at all but he noticed the hot and cold water were reversed on my sink faucet and in 3 minutes he corrected it no charge! He couldn't have been nicer. I was only charged $100. for the whole thing. they have definitely become my go-to plumber!"
Carol B on November 2020

Time Plumbing, Heating & Electric INC
Time Plumbing, Heating & Electric INC
Founded in 1983, Time Plumbing, Heating & Electric Inc. has been serving the Denver, CO area with their plumbing, heating and electrical needs. If you have a drain that needs cleaning, a heater installed, or your panel box upgraded, then call the experts at Time Plumbing, Heating & Electric Inc. They are excited to hear from you so make the call now for your next appointment!
"So I've just sold my home in Lakewood and the Technicians at Time have come to repair a furnace motor and correct an code violation in my electrical panel that the city missed when I stalled 4 years ago. Their service has always been excellent. Madison returns messages first thing in the morning. The electrician Kevin Wendt explained the code violations clearly and corrected in 2 hours. I forgot the young man who repaired my furnace but he found the last motor in town for my model, potentially saving me having to spend thousands more. Home repair is never a pleasant experience but 3 times over the last decade, this business has given me peace of mind and fixed all issues quickly and professionally. Richard Gainer"
Richard G on April 2023
Founded in 1983, Time Plumbing, Heating & Electric Inc. has been serving the Denver, CO area with their plumbing, heating and electrical needs. If you have a drain that needs cleaning, a heater installed, or your panel box upgraded, then call the experts at Time Plumbing, Heating & Electric Inc. They are excited to hear from you so make the call now for your next appointment!
"So I've just sold my home in Lakewood and the Technicians at Time have come to repair a furnace motor and correct an code violation in my electrical panel that the city missed when I stalled 4 years ago. Their service has always been excellent. Madison returns messages first thing in the morning. The electrician Kevin Wendt explained the code violations clearly and corrected in 2 hours. I forgot the young man who repaired my furnace but he found the last motor in town for my model, potentially saving me having to spend thousands more. Home repair is never a pleasant experience but 3 times over the last decade, this business has given me peace of mind and fixed all issues quickly and professionally. Richard Gainer"
Richard G on April 2023
High Mile Drywall
High Mile Drywall
We have the experience and dedication to get the job done right! Specializing in drywall services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!
We have the experience and dedication to get the job done right! Specializing in drywall services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!
Four Seasons Landscaping Company
Four Seasons Landscaping Company
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

Crystal Clear Drains, LLC
Crystal Clear Drains, LLC
Here at Crystal Clear Drains, LLC we sustain our business on quality and integrity. We are experts in our trade and our commitment to quality from beginning to end of your project. We look forward to earning your business. Call us anytime with any questions you may have. Thanks for your time and have a great day.
"They were the first to respond and I was able to get an appointment for the next working day. John came right on time and did a thorough diagnosis , explaining why my kitchen drain got clogged. He snaked my drain and it works perfectly now. He also gave me some good advice on how to keep my drain clear. I would recommend this business to any homeowner and will use them again!"
Mary B on November 2020
Here at Crystal Clear Drains, LLC we sustain our business on quality and integrity. We are experts in our trade and our commitment to quality from beginning to end of your project. We look forward to earning your business. Call us anytime with any questions you may have. Thanks for your time and have a great day.
"They were the first to respond and I was able to get an appointment for the next working day. John came right on time and did a thorough diagnosis , explaining why my kitchen drain got clogged. He snaked my drain and it works perfectly now. He also gave me some good advice on how to keep my drain clear. I would recommend this business to any homeowner and will use them again!"
Mary B on November 2020

Doone Brothers Sewer and Septic Services, LLC
Doone Brothers Sewer and Septic Services, LLC
With over 10 years of experience in the septic system industry, we are the experts you need to take care of your home or business. We handle everything from new septic installs to repair work. We will treat your home as we would treat our own. Give Doone Brothers Sewer and Septic Services, LLC, a call today, we look forward to working with you!
"I highly recommend Seamus, Kellen, and their team at Doone Brothers. They did my septic as well as my full site excavation/grading/driveway project. My site is very steep and challenging. I found them to be hardworking and fair. They went above and beyond with their communication and effort on my project and Iâ m super grateful to them for the work they did."
Carissa C on September 2020
With over 10 years of experience in the septic system industry, we are the experts you need to take care of your home or business. We handle everything from new septic installs to repair work. We will treat your home as we would treat our own. Give Doone Brothers Sewer and Septic Services, LLC, a call today, we look forward to working with you!
"I highly recommend Seamus, Kellen, and their team at Doone Brothers. They did my septic as well as my full site excavation/grading/driveway project. My site is very steep and challenging. I found them to be hardworking and fair. They went above and beyond with their communication and effort on my project and Iâ m super grateful to them for the work they did."
Carissa C on September 2020

Colorado Paradise Builders, LLC
Colorado Paradise Builders, LLC
Colorado Paradise Builders, LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 20 years of hands-on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!
"Francisco Garcia did an excellent job finishing our basement. The work quality is excellent. The communication and flexibility throughout the project was excellent. The project finished on time within budget with zero surprises. Any concerns that arose were addressed expeditiously and professionally. I highly recommend Colorado Paradise Builders for your next project. The building inspections were coordinated by Colorado Paradise Builders and passed easily. We learned while talking to the inspectors that we had a gift by using Francisco as a general contractor. They mentioned other people in the business may not provide the level of customer service and professionalism which Colorado Paradise Builders demonstrated on our basement finishing project. I could not be more enthusiastic with a recommendation."
Jeff B on February 2023
Colorado Paradise Builders, LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 20 years of hands-on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!
"Francisco Garcia did an excellent job finishing our basement. The work quality is excellent. The communication and flexibility throughout the project was excellent. The project finished on time within budget with zero surprises. Any concerns that arose were addressed expeditiously and professionally. I highly recommend Colorado Paradise Builders for your next project. The building inspections were coordinated by Colorado Paradise Builders and passed easily. We learned while talking to the inspectors that we had a gift by using Francisco as a general contractor. They mentioned other people in the business may not provide the level of customer service and professionalism which Colorado Paradise Builders demonstrated on our basement finishing project. I could not be more enthusiastic with a recommendation."
Jeff B on February 2023
The Thornton, CO homeowners’ guide to septic tank services
From average costs to expert advice, get all the answers you need to get your job done.
A damaged septic system can leak odors and sewage, so repairs are urgent. Find out how much septic tank repair costs based on repair type, tank size, and more.
A small septic tank system is ideal for spaces with minimal needs, such as a one-to-two-bedroom apartment or guest house. A small septic tank contains 750 or 1,000 gallons. We’ll cover everything that factors into your small septic system cost here.
The average cost to connect to a public sewer line can vary depending on the linear foot, piping material, local regulations, and more.
Knowing your septic tank’s location can help you clean and repair the system quicker. Learn five methods for how to find a septic tank lid with this guide.
Learn how to install a sewage ejector pump to keep the plumbing in your basement-level bathroom or laundry room moving in the right direction.
To unclog a sewer line, you may need to access your septic cleanout. If so, you might wonder: How do I find my septic tank cleanout? Find out in this guide.
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