8937 Sundance Dr. Billings, MT 59101



wastewater And septic

Whether your wastewater or septic project is residential or commercial, we are here to make the engineering, designing, and/or permitting process as streamlined and headache-free as possible. We have engineers and experts on hand who know the ins and outs, and who have strong working relationships with officials at both the county and state levels. Our goal is to be your go-to resource from start to finish! Let’s get this project started!

Engineering, Designing & Permitting - TLC Patriot Septic And Excavation


We are proud to be the only septic company in the area with an “in-house” engineering team. One phone call and we can take care of your project from start to finish. Our team is made up of experts in the wastewater industry and we can handle large-scale commercial projects or small-scale residential. Either way, we’ve got you covered!

Septic system inspections


Permitting can sometimes be a confusing and time-consuming process. With all of the county and state regulations and requirements, most people find the permitting to be the worst part of the entire project. Thankfully, our team is ready to help! We are happy to guide you through the steps or we can take that aspect of the project off your shoulders completely. Please let us know how we can be of service!



If your property is not part of a subdivision, if there is no COSA on file with the county, or if there is a current septic system in place to which you are wanting to make changes/expand/etc., then it is likely that your project will need to be engineered. Since there are many nuances to this requirement, we always encourage clients to call us with the particulars of their situation and their property. Estimates and consultations are always free.

Generally speaking, you should plan on at least 30 days. However, the amount of time it takes to engineer a project is dependent on factors such as the scope of the project, the time of year, and the responsiveness of the County Health Department and/or the MT DEQ.

We would be happy to assist you in getting a septic permit! Otherwise, you can find resources for the various counties below:

Yellowstone County

Stillwater County

Carbon County

Engineering typically starts around $5000 but varies depending on the project requirements.

We decided to incorporate engineering and design into our list of services because we wanted to be a true one-stop-shop for all things septic-related. A customer can come to us with their wastewater project and we can take it from there from the start to the finish! Even though we are happy to work with any engineer of your choice, we believe that our engineers are the very best in the industry and that their expertise and customer service is unmatched!

We are licensed in the entire state of MT to engineer and install septic systems.

New technologies such as our SludgeHammer Advanced Treatment System has made what used to be impossible wastewater feats possible. Reach out to us today and we will see if the SludgeHammer is an option for your property!

We look forward to serving you!

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