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Find Septic system installers and replacers in Boulder

Avatar for Peak Plumbing & Drain Repair, LLC
Peak Plumbing & Drain Repair, LLC
4.9(
57
)

Serving Boulder, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Credit card accepted

"Tim has the finest septic pump out service I have ever experienced. He owns excellent equipment, he is very polite and honest as well as a wonderful evaluator of the state of the system and possible repairs needing to be addressed. His pricing is the best I found and well worth it in my opinion. I will never search again for this service, Tim has earned my respect and all future business."
Before
Sewer Repair
Response time6 hrs
97 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Crow Creek Septic Services LLC
Crow Creek Septic Services LLC
5.0(
11
)

Serving Boulder, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"Crow Creek did an amazing job pumping and cleaning my septic tank. They showed up on time and were very professional. They also were respectful of my property and cleaned up after the job was done. I will definitely hire them again. Thank you!!!"
Response time11 hrs
Response rate94%
13 neighbors recently requested a quote
Dr. Drain
5.0(
9
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2014

Free estimates

Credit card accepted

"I had him replace the water lines on the hot water heater. The owner, his name is Jordan, he was on the ball. He knew his stuff. He was responsive. He was very efficient in getting me an estimate right away and thorough about understanding the work and letting me know what to expect and then getting it done very timely."
Best Dog Ever
Pre Lined CIPP Pipe
Busy Day, Boulder CO
Wining
NuFlow Liner

+1

Response time2 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for Afford-A-Rooter
Afford-A-Rooter
4.7(
119
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"The company showed up when they said they would and completed the job within the time frame that they stated. Communication was a little rough with the field, but communication with the office was very responsive. Considering the extent of the work and the constraints within which they had to work, there was remarkably little collateral damage done. Unfortunately I was not able to witness the work before it was covered up and so I cannot comment on the quality of the installation, but can say that the company did a good job protecting the surrounding landscaped areas and seemed contentious and thoughtful in their approach to the work. I would definitely work with them again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+7

Response time3 days
Recommended by89%of homeowners
Avatar for All Sewer and Plumbing Services
All Sewer and Plumbing Services
4.8(
12
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"We had a backup in our main and these guys came out within 30 minutes on a Sunday. They cleared the blockage for us and even offered to come back and clean it if it happened again within 30 days (which it did, and they came out immediately to clear it again). They were very helpful and I would highly recommend them for anyone needing a plumber."
Response time2 hrs
Response rate89%
10 neighbors recently requested a quote
Avatar for A to Z Remodel & Repair LLC
A to Z Remodel & Repair LLC
5.0(
23
)

Serving Boulder, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"Matt and Alexander responded really quickly to my request and were able to complete the work in my bathroom the following week. They replaced faucets and light fixtures and also installed a niche in my shower. I’m super pleased with the quality of work and will use them again for future house projects. "
Arvada Remodel
Arvada Remodel
Arvada Remodel
Arvada Remodel
Arvada Remodel

+11

Response time1 day
Response rate88%
2 neighbors recently requested a quote
Avatar for Doone Brothers Sewer and Septic Services, LLC
Doone Brothers Sewer and Septic Services, LLC
5.0(
7
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"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."
Response time2 days
20 neighbors recently requested a quote
Recommended by100%of homeowners
Showing 1-10 of 14
FAQs for septic system installation and replacement projects in Boulder, CO

The smallest standard septic system uses a 500-gallon tank, which costs between $875 and $1,150 installed. This size works well for single-occupant dwellings with minimal wastewater production. However, many local regulations specify minimum tank sizes, so check with your building department before committing to this compact option. Some jurisdictions require at least 750 gallons regardless of home size to ensure adequate waste processing capacity.

The installation timeline varies based on site conditions, permit processing, and contractor schedules. The process includes obtaining permits, conducting soil tests, excavation, tank placement, leach field construction, and final connections. Weather conditions, soil challenges, and inspection scheduling can all affect the overall timeline. It's wise to begin planning well in advance of when you need the system operational.

The most economical approach is to install a conventional anaerobic system with a plastic tank. To minimize costs while maintaining legality, obtain multiple quotes from licensed installers, consider scheduling during their slower seasons, and handle basic site preparation yourself. Never skip permits or required testing to save money—illegal installations can result in significant fines and mandatory removal, ultimately costing far more than doing it right initially.

Regular pumping helps prevent system failures and extends operational life. Most small systems require pumping every three to five years, though frequency depends on household size and usage patterns. Pumping services cost between $290 and $530, making this maintenance expense relatively minor compared to potential repair costs ranging from $500 to $2,600 for neglected systems. Establishing a regular maintenance schedule based on your installer's recommendations helps avoid costly emergency services.

The Boulder, CO homeowners’ guide to septic system installations and replacements

From average costs to expert advice, get all the answers you need to get your job done.