Underwood Plumbing and Septic Services LLC provides dependable plumbing installation services in Prosper, TX for residential and commercial properties. Whether you are building a new home, remodeling, or replacing outdated plumbing systems, our experienced team delivers quality workmanship using durable materials and proven installation methods. We focus on efficient, code-compliant installations that help your plumbing system perform reliably for years to come.
Burst pipe in the evening, or a backup on a holiday, we’ll get a truck rolling.
Call us:We pick up nights and evenings, holidays included, and get the installation on the schedule.
Walk the job:We look at the existing lines, fixtures, and access before we open a wall or a slab.
Explain your options:You hear the scope and the price before any work starts.
Install it:Fixtures, water lines, drains, and repipes go in with the parts on the truck when the job allows.
Test the work:We run water, check pressure, and look for leaks before we pack up.
Leave it clean:The work area gets cleaned up before we head out.

We install plumbing systems, water lines, drain lines, pipes, fixtures, and plumbing components for residential and commercial properties.
Yes. We provide complete plumbing installation services for new homes, commercial buildings, additions, and remodeling projects.
Yes. We replace aging plumbing systems with modern installations designed for dependable performance and long-term reliability.
Prosper is in Collin County. We’re already working Prosper, handling calls daily across town. We also cover Collin, Grayson, Fannin, Hunt, Lamar, and Cooke counties.
Yes. Financing is available on larger installations and replacements, subject to credit approval. See our Financing page or ask your plumber.
Why Underwood

01
Nights, evenings, and holidays. We pick up the phone.

02
Our vans carry the parts for the installation jobs we actually get called on, so a fixture or a short repipe often finishes on the first visit.

03
A backup can be the line in the wall or the tank in the yard. We handle both on the same call.

04
What We Fix

We install plumbing for homes and businesses in Prosper and the rest of Collin County. We’re already working Prosper, handling calls daily across town.
Reviews

Reviews
4.9
(1521 Reviews)
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Michael JeterTrustindex verifies that the original source of the review is Google.
Plumber knew his job and how to fix the problem fast.![]()
Sheldon NicolleTrustindex verifies that the original source of the review is Google.
Chad came by and did an amazing job. Peace of mind is a valuable thing. Thanks Underwood!!![]()
Saphir ButterTrustindex verifies that the original source of the review is Google.
I needed a sewer tank cover replaced due to it being hit by the lawnmower. These guy fixed it in less than 30 minutes. Chad also suggested putting landscaping stuff around the 4 tanks to prevent this happening again. Totally happy with their service.![]()
Sally MayTrustindex verifies that the original source of the review is Google.
Great
More Services
Burst pipes and backups. We pick up nights, evenings, and holidays.
Protect Your Home
At Underwood, we offer tailored solutions to keep your home and its systems running smoothly. Whether you need memberships to be county compliant or simply maintain your systems for the long haul, we have a plan to fit your needs.

Get in Touch
Tell us what’s being installed in Prosper and we’ll get a licensed tech out to you.
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Service Areas
Prosper sits in Collin County. We cover Collin, Hunt, Grayson, Fannin, Lamar, and Cooke counties. Bryan County, Oklahoma is septic maintenance only.