Alpha Trenchless
Company Overview
At Alpha Trenchless, we provide residential and commercial underground utility repairs, covering minor leaks to entire re-piping projects. We possess the expertise and tools to manage it all. Our services include underground utility services across both Marin and Sonoma Counties ensuring a rapid response. As a local, family-owned business, we provide services for both residential and commercial utility needs underground. For over 15 years, our family has been providing the communities of Marin and Sonoma. We take pride in delivering prompt and friendly service across Marin and Sonoma Counties; delivering affordable rates, high-quality plumbing materials which are eco-friendly, while addressing your plumbing needs.
We are a well-run, family-owned local business, providing services to residential and commercial utility services underground. For over 15 years, our family has been delivering the communities of both Marin and Sonoma Counties since 2009.
We are a licensed, bonded, and insured complete pipeline service company. License number in California: #1044308.
Hi, I’m Javi, the project manager here at Alpha Trenchless. I am responsible for planning and monitoring projects to guarantee everything runs smoothly and as planned. Additionally, I guide our team to ensure project coordination and completion.
As a family-run business, catering to much of Marin and Sonoma Counties since 2009. Our goal is to be known for delivering exceptional underground plumbing services that meet the highest standards for our clients.
Business Services
- Soil backfilling and compaction
- Excavation
- Gas line installation
- Gas line repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Sump pump installation
- Sump pump repair
- Trench digging
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
Mon: | 8:00 AM - 5:00 PM |
Tue: | 8:00 AM - 5:00 PM |
Wed: | 8:00 AM - 5:00 PM |
Thu: | 8:00 AM - 5:00 PM |
Fri: | 8:00 AM - 5:00 PM |
Sat: | Closed |
Sun: | Closed |
Recommended Customer Reviews

Excellent service and workmanship from start to finish. They were prompt in assessing the issue, offering a solution, and getting the job done. Great communication from the office and on-site. Cleaned up everything at the end.
These guys set the standard for professionalism.

One of the best experiences I've had with contractors in Mill Valley. I contracted Alpha Trenchless to replace our sewer lateral in MV. We had reached out to three companies and from three quotes, theirs was right in the middle. We chose them because they were punctual, organized and their staff had great attitudes. Ours was a pretty big project and I was concerned it might take a few days to get this done. Luckily Alpha came prepared, they brought five crew members and all of the necessary equipment to finish the project in ONE DAY. I couldn't believe it! Javi and Juan were complete professionals the entire time. They kept me informed of what they were working on and why they were doing what they were doing. If we have any other plumbing needs we're calling Alpha Trenchless first.

we searched for this company for awhile, and they were perfect. did great work (connecting us to a city sewer) , reasonable price,

I engaged Alpha Trenchless to repair and replace my sewer lateral. They were, for the most part accommodating at the outset and did replace the pipe, which seems to now be draining properly. However, I cannot give them a good review because we had some disagreements, and their behavior in response was rude, bullying, and offensive.
My situation was perhaps a bit unique because the damage to my pipe was near the main in the street, and it was agreed that perhaps this was not my fault, and perhaps it was the fault of a utility company that had recently done work in the area. The City of Novato had agreed to consider compensation if they could see photographs of the damage. I thus spoke to the owner of Alpha Trenchless, and we agreed verbally that he (the owner) would take photographs of the damage for my use. This did not seem to be a problem, but upon doing the work, they chose to take an alternate route to the main, which meant they could not take the photos. Rather than calling me and informing me of this decision or asking what I might want to do, they just did their work and covered the hole, completing the project.
The problem is that now I did not have photos. When I mentioned this, the owner was defensive and aggressive. He did not seem concerned at all about our previous agreement, nor did he seem to care that I would not have the opportunity to address compensation with the City of Novato. On the contrary, he was, as I said, defensive and threatening, if not abusive.

They repaired my Mill Valley ""sewer lateral"" for $2,500, whereas I was expecting to pay about $10K! They arrived promptly, worked efficiently, and cleaned up thoroughly. As a bonus, their technician was happy to indulge my interest in their technology by explaining how everything worked.

So impressed by this company. Javier responded very quickly to my call and assessed my plumbing problem in minutes. I was all set to have my water line replaced because none of the other plumbers I called could tell me why I wasn't getting water. I felt desperate and didn't want my whole yard dug up and thought a trenchless company was my best bet. I had previously worked with another plumber to install a pressure valve on my lines and it seems that he put everything on backwards! Javier spent the time to investigate and found that all that was needed was an inexpensive repair to correct all the mistakes made by the previous plumber. It speaks to his honesty and integrity that he did not take advantage of the situation and tell me I needed a new line. Esperanza in the office is very efficient and friendly and I felt I was in good hands. They even put me in touch with someone to help with my irrigation problem. Highly recommended

I needed to replace sewer lateral line for my house in Mill Valley. I contacted Alpha Trenchless. Alpha Trenchless had done an excellent job from the beginning to the end of the project. Starting with the office manager, Esperanza, she was very responsive to my request (almost instantly). More importantly, her customer service skill was very professional. Then to the project manager (Javi) and their technicians, they were all very nice and professional as well. They finished the project in 2 days. Part of the project required digging a few holes in my yard as well as on the city street. Upon the completion of the project, I can't even tell that there were holes digging during the project. They patched up and put everything back exactly the way it was. Of course, the most important part of the project is coordinating with the city inspector as well as the inspection result. Everything passed the inspection in the first time with no comment. I'm very impressed with Alpha Trenchless work. Thank you very much again Alpha Trenchless for your excellent work. We need professional contractor like you to help us.
Best wishes,
Duy

Guy did great job scoping my sewer lateral and also marked the area for me. Very nice and professional worker

We enjoyed working with the whole team at Alpha Trenchless. They were very responsive by phone and email, very reasonably priced and clear on expectations. We appreciated the helpful photos and video from under our house showing before and after the work. The crew were quick and kind and adapted to what they found underground. We will work with Alpha Trenchless again!

A joy to work with! Warning: this will be a bit long and detailed :), but I think it's a particularly insightful story, so here goes...
We had an issue with our sewer ejector pump backing up and running, even when nothing was flushing. Javier from Alpha Trenchless (and his little helper one day :) diagnosed and fixed it quickly at *very* reasonable cost. He was also very honest and explained everything to us patiently in earnest detail.
And we know this is definitely true because he was the *third* team to come out, so we inadvertently got detailed comparisons of Alpha Trenchless vs. two other 4.5+ star, rigorously-reviewed plumbing companies. Not to knock them, but just to be fair in telling the whole story:
The first company we called has 4.5 stars and lots of reviews on Yelp. It charged us ~$400 across two trips just to video inspect the pump, basin, and pipe all the way out to the street. Then they misdiagnosed the issue and quoted us $15-20k to do a full project to ""fix everything"". When you're being asked to pay the price of a midsize Japanese sedan to fix a plumbing issue, you get additional opinions.
The second company we called has 5 stars and lots of reviews on Yelp. A couple of nice gentlemen came out, took a look (literally a look), and quoted us $2k to come back the next day to take apart the pump and evaluate it. If that came back OK, *then* they said they'd come back again at (unknowable!) separate cost with video snake thing to inspect the pipe out to the street.
On a whim, I called a third company also highly-rated: Zaragoza Plumbing. They were booked that day, but mentioned that since there might be a pipe or larger trenchless project (per first company's $20k mention), I should talk with Alpha Trenchless who they knew well and recommended.
I called them, a nice contact on the phone was very responsive. Javier came out a couple hours later and was almost apologetic about charging just a couple hundred bucks to immediately inspect the pump and basin, and video inspect the pipe out to the street.
He then patiently explained with video everything he was seeing, taking care not to obscure any detail behind hand-wavy expertise. Within that, he didn't trash the first company, but did explain using the in-pipe video where he disagreed with the assessment that we would need to do a huge project.
I felt so much more confident in my understanding of what was happening in that short conversation than all of the chats leading up to it, that I actually immediately went and wrote down all the detail in an email to myself for future knowledge.
He went over 2-3 potential routes, but recommended trying the least costly fix that would be a couple more hundred dollars. He was back a couple days later with parts in-hand as his schedule allowed to fix it. And he fixed it.
My only regret is that it's taken me several weeks to remember to sit down and right this review. Best experience with a local service provider I've ever had.