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Top-Rated Plumbing installers for a remodel or addition in San Marcos - Updated Nov 2026

Avatar for Garrett's Plumbing
Garrett's Plumbing
5.0(
33
)
Plumbing for a Remodel or Addition - Install

Serving San Marcos, TX and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"Garrett’s Plumbing was a life saver. I have a copper waterline on the ice maker of my old refrigerator. No delivery company wanted to install the new refrigerator because of the copper waterline. Garrett’s plumbing came, assessed and fixed the problem. Now I’m just waiting for delivery of the new refrigerator. Thank you Garrett’s Plumbing."
6 neighbors recently requested a quote
Avatar for Indigo Home and Facility Services
Indigo Home and Facility Services
4.8(
46
)
Plumbing for a Remodel or Addition - Install

Serving San Marcos, TX and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"Two young men arrived, identified themselves well, brought the parts needed as requested and got right to work. They were efficient and professional and answered all our questions clearly while progressing with the work. They shut down the house water and worked efficiently to complete the job. They removed the old spout and valve, inspected and repaired the old plumbing located behind the old fixtures, and installed chromed plated fixtures that met our expectations splendidly. We were given the cost for the parts and for the time it took to install and we paid with a check on the spot for the service rendered. Everything was well organized and executed. We would suggest them to anyone."
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+21

Response time2 days
Recommended by95%of homeowners
Avatar for Haul Away Junk Removal and More
Haul Away Junk Removal and More
5.0(
34
)
Plumbing for a Remodel or Addition - Install

Serving San Marcos, TX and surrounding areas

In business since 2018

"Very awesome job was very professional asked for specific stuff done and they completed the task I would definitely hire them again honest and great to have around trustworthy thanks for the service!!!!"
Done
Before
After
Before
Appliance removal

+128

Recommended by100%of homeowners
Avatar for Rockin V Plumbing
Rockin V Plumbing
5.0(
8
)
Plumbing for a Remodel or Addition - Install

Serving San Marcos, TX and surrounding areas

In business since 2023

Free estimates

Emergency services offered

"From beginning to end Bob was very professional and transparent with pricing and how the entire process would go for installing our new water softener. We will absolutely be using him again for all our plumbing needs"
Plumbing Project
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+18

Recommended by100%of homeowners
Avatar for Vortex Plumbing Solutions LLC.
Vortex Plumbing Solutions LLC.
5.0(
12
)
Plumbing for a Remodel or Addition - Install

Serving San Marcos, TX and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"Working with Vortex Plumbing Solutions from a customer standpoint was an amazing experience. It’s hard to trust people these days but Joe Sabin from Vortex really went above and beyond and earned our trust. He is efficient, professional, and the quality of his work is unmatched. I will be using Vortex Plumbing Solutions for all of our plumbing needs."
City of Kyle
City of Kyle
Water heater replacement
Water heater replacement
Avatar for TEAM FLO-RIGHT LLC
TEAM FLO-RIGHT LLC
5.0(
11
)
Plumbing for a Remodel or Addition - Install

Serving San Marcos, TX and surrounding areas

In business since 2017

Emergency services offered

Credit card accepted

"I am a general contractor. I have used many plumbers/ac companies in the past. I started using this companies services about 5 yrs ago. Most of my projects are in residential remodels. Although I also deal a lot with restaurants. I wish I would have known about this company earlier. Steven not only knows how to perform, but his knowledge about what is right and wrong sets him apart. I would not hesitate to refer him to any person or contractor that asked me. I continue to use his services. And my remodels show his excellent workmanship."
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+5

Recommended by100%of homeowners
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FAQs for plumbing installation for a remodel or addition projects in San Marcos, TX

Adding bathroom plumbing to a detached garage starts with the basic line installation cost of $900 to $1,300. On top of this base expense, you'll need to budget for each fixture. A toilet costs  $250 to $550, sinks cost $150 to $800, and a shower or bathtub costs $400 to $1,900. The project will also require ventilation, moisture-resistant materials, and possibly electrical work. Remember that these costs reflect only the plumbing aspects—additional construction, finishing, and permitting expenses will apply to complete a functional bathroom space.

While certain aspects of garage renovation might be suitable for DIY enthusiasts, plumbing installation requires professional expertise. Connecting to water and sewer systems demands specialized knowledge and equipment, and improper installation can result in severe water damage, code violations, and potential health hazards. Most municipalities require permits for plumbing modifications, and these often stipulate that licensed professionals must perform work. Consider limiting your involvement to simpler tasks like painting or basic finishing work.

The timeframe for adding plumbing to a detached garage spans one to three days for the actual plumbing work. However, this represents only the active installation period. The complete project timeline must account for planning, obtaining permits (which can take weeks depending on your locality), coordinating multiple contractors if needed, and addressing any unexpected challenges that arise during installation. Weather conditions can also impact excavation and outdoor connection work.

Adding plumbing to a detached garage will likely increase your property taxes. Tax assessors consider plumbing an improvement that enhances property value and functionality. The specific tax impact varies by location and project scope. Converting a garage into living space with plumbing facilities can trigger significant reassessment in many jurisdictions. Before proceeding with your project, consult your local tax assessor's office to understand the potential tax implications and factor this ongoing expense into your decision-making process.

The San Marcos, TX homeowners’ guide to plumbing installations for a remodel or addition

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