Expert Septic System Installations & Repairs in Central Texas

Turnkey solutions from permits to final inspection — fast, reliable, and done right the first time.

Licensed • Insured • Locally Owned

Residential & Light Commercial

Site Prep • Tanks • Drainfields • Repairs

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(512) 886-5514

About Us

Built on integrity.

Installed to last.

Cornerstone Septic is a locally owned septic installation and repair company serving Central Texas. We specialize in high-quality, code-compliant systems designed to last—handling everything from permitting to final inspection.

We believe in honest pricing, clear communication, and craftsmanship you can trust.

Licensed & Insured

Fast Scheduling

High-Quality Tanks & Materials

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Your Local Experts for Complete Septic Services in Manchaca, TX

Septic Trouble? Call the Team That Cares!

We’re here to make septic service easy and worry free. From new installations to emergency repairs, our focus is your peace of mind. You can always expect clear communication, dependable work, and no shortcuts or surprises. We take care of your home the same way we’d take care of our own.

Complete installs for homes & businesses
Turnkey service from permitting to inspection
Clear communication and honest pricing
Emergency repairs when needed
A team that treats your property with care

New Septic System Installation

We handle full residential and light commercial septic system installations. From site prep to final inspection, we make sure your new system is done right, meets all local codes, and is built to last.

Permitting & Design Assistance

We’ll help you navigate the full permitting process, from soil tests to CAD design support. Whether you're a homeowner or installer, we make sure everything is in place before work begins.

Septic System Repairs

From cracked tanks to broken lines, we repair all types of septic issues. We also handle aerator motor replacements, drainfield problems, and emergency repair calls.

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Our Work, Their Words

Across Central Texas, families and property owners share stories of how Cornerstone Septic stepped in with honesty, clarity, and real care when they needed it most. From new builds to unexpected repairs, our team shows up with integrity and a commitment to doing things right. The kind words we receive remind us why we do what we do: to help people feel supported, safe, and confident in their homes and projects.

You can tell this team actually cares about their work and the people they help. They’re reliable, friendly and make what could be a stressful situation feel simple and handled. It’s nice seeing a company that does things the right way from start to finish.