4.7 
11 *The Angi rating for Septic Tank Service companies in Mill Valley, CA 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 Mill Valley, CA 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 June 03, 2026
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2013
Free estimates
Credit card accepted
"Quick response to a blocked septic tank!"
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Miguel is responsive and professional. He has a confident grasp of excavation project options."
+11
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2003
Warranties offered
Credit card accepted
"Good service. Nice clean team"
+4
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2021
Free estimates
Offers commercial services
"I cannot say enough about how good this experience with John Mountain/Mountain Engineering has been. They said it would be 3 weeks; anti was. The work was painstakingly done, including a French drain behind the wall. And they replaced the plants that were destroyed during the process, which was an unexpected bonus."
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2025
Emergency services offered
Warranties offered
"Jesus was very professional in explaining and showing me what was going on with my drains. Out of the bids I got to replace my house drain we was the most responsible and very knowledgeable. 20k for three bathrooms under crawl space"
+7
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"Leo went out of his way to meet my concerns about cost, collaboration with my neighbor, and how the fence would look. He submitted multiple bids giving me options as to how to do it and at what cost. He tailored his approach to my needs. His team was easy to work with. The team worked quickly, efficiently, and throughly. The fence looks great!"
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2017
Free estimates
Customers say: True professional
"We could not be happier with our new bathroom, thanks to McCormick! Khaled was knowledgeable and really took the time to understand our style preferences. The whole team was great about keeping the workspace tidy, which we appreciated. Now, we have a bathroom that feels luxurious and welcoming. Highly satisfied with their work!"
+1
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2019
Free estimates
Credit card accepted
"Turf came out very nice. Jovanni was a great salesman. Noe and his crew were very efficient and professional"
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
Here at Raya Engineering, we sustain our company on the principal that our customers come first. We offer services that are tailored to your needs and we're ready to show you what our experience can bring to your project! Call us today!
Serving Mill Valley, CA and surrounding areas
Approved
In business since 2019
Free estimates
Credit card accepted
RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!
From average costs to expert advice, get all the answers you need to get your job done.
How Much Does It Cost to Pump a Septic Tank in San Francisco, CA?
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.
It’s crucial to install a septic tank with the right volume to avoid wastewater backups. This guide will help you calculate the right septic tank volume.
Septic tank sizes vary depending on the size of your home, how many people live there, how much water you use, and more. Read on to learn how to determine the right size for you.
If you’ve never lived in a house with a septic system before, you might be wondering: Are septic tanks bad? Here are some of the pros and cons.
Want to learn how to build a septic tank for your rural or off-grid property? First, check your local laws, then dive into these general guidelines.
