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We have more than 18 years of experience

CA LIC # 1016766

Highsmith & Daughters Plumbing Inc.

Highsmith & Daughters Plumbing Inc.

Your Go-To Conejo Valley Plumbing Service

We are a licensed plumbing company in Simi Valley, servicing all cities in and around the Conejo Valley. We are happy to provide both residential and commercial service and repair services.

Our promise to you is that we will provide a fair and accurate price for your job and complete it professionally and on time. Our licensed team of plumbers will always be courteous and make sure the job area is left clean after job completion.


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Our Services

Installation Services

Do you need to install a new toilet, faucet, water heater, valve, pipe, or gas line? Have it done professionally with the help of our licensed and experienced top-notch team.

Drain Cleaning Repair and Removal

Say goodbye to pesky, stubborn clogs. We will help restore your sewage or storm pipes, as well as replace any piping that is eroded beyond repair.

Slab Leak Repairs

Do you suspect that you have a leak in your water line? This can cause catastrophic damage if not handled timely. Our team will work to detect, repair, and replace the lines.

Repair and Replace Gas Lines

Our team can help install new gas lines or repair existing gas lines.

Our Projects

Recent projects we’ve completed:

Shown here is just a small sampling of some of the recent projects that we’ve successfully completed. Feel free to ask for references so you can validate our craftsmanship!

What We Do

We are proud to offer reliable plumbing service in Thousand Oaks, CA and Conejo Valley.

This always means:

  • Affordable and reliable service
  • Friendly and respectful technicians
  • The top-rated company on Yelp
  • 24-hour emergency service available

New Gas Line Install

Gas line replacement in Thousand Oaks

Laundry Box Install

Recessed laundry box installation in Simi Valley

Toilet Repair

Fixed improprely installed toilet by a previous contractor in Camarillo

Bathtub Install

Removed rotted tub and made new drain connections for a customer in Simi Valley

Yelp Reviews

Amazing Work!

Jay was sent out to our home to fix a sink and a toilet. The sink had been “fixed” twice before with no luck from handymen my landlord sent out.

So I called Highsmith and was not disappointed. Came out when they said they would after a warning call. Always nice to get a heads up when you have dogs that you need to lock up.

Jay was straight up with me and I appreciated that. He also screwed my toilet seat back in for me

No more washing dishes in my backyard! Thank you!! I highly recommend this company and will be using them again myself.

– Jessica D. Simi Valley



Keeping in mind that there are a ton of fake reviews out there and dishonest service people, I was dreading the search for a legit plumber. Especially after being ripped off a couple months ago by a different local plumber. But I was really fortunate and lucky to find HDP.

Matt was able to come out fairly quickly and answer all of my questions regarding a leak we had at my parents home. He originally told me the job could take anywhere from 4-6 hours but he was done by 3, and even fixed an issue that the other plumber had failed to do. Matt was also able to give me an awesome referral to get the ceiling patched up.

Matt and his buddy were friendly, respectful-always putting on booties when walking into the house, and so efficient! I would highly recommend going to HDP for all your plumbing needs!

– Shirley H. Moorpark


Came out on a weekend emergency in a half hour

We have called on a Saturday and Sunday and Matt came out within a half hour both times.

I feel like he was reasonable even though it was off hours. He fixed both problems and gave us insight into what was going on (cameras showing the situation with our sewer).

I’ve called other plumbers, and none were as skilled and helpful. He was also really nice and not only fixed our problem but cleaned the sink and underneath, something I was dreading because it was sooooo awful. I highly recommend them!

– Melinda B. Thousand Oaks


Why Choose Us

My name is Matthew Highsmith, and I’m the owner of Highsmith & Daughters Plumbing Inc. Below are the reasons why you should choose my team for your next plumbing job.


I’m lucky enough to love what I do! Before hiring anybody new on my team, I ensure that they are as equally as passionate about their job. When you’re passionate about your trade, your work is top-notch and speaks for itself.


We both know there are a lot of shady service companies out there. My promise is always to give you a fair price and complete the job cleanly and professionally.


Plumbing is not just a train that you learn for a few years. I keep up to date by taking yearly classes about the newest and most efficient products for the plumbing trade. I, in turn, teach what I learn to my team so they can become better plumbers as well.
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