New construction & ADU Plumbing

Building a new home or adding an ADU requires plumbing work that’s done correctly from the beginning. Proper installation affects everything that comes after—water pressure, drainage, long-term reliability, and even property value. CSA Plumbing & Rooter provides complete plumbing services for new construction and ADU projects throughout Los Angeles and the San Fernando Valley. With over 15 years of experience, we focus on careful planning, clean execution, and full code compliance so your project moves forward without surprises.

Planning Layout

Planning & Layout

Every successful plumbing system starts with the right design. We collaborate with homeowners, builders, architects, and general contractors to map out efficient and practical plumbing layouts. This includes water supply lines, sewer lines, gas piping, and venting systems. Our goal is to create a system that functions smoothly, meets all local and state plumbing codes, and supports the long-term needs of the property. We take the time to understand fixture locations, appliance requirements, site conditions, and any specific constraints of ADU spaces, ensuring a system that’s both durable and easy to maintain.

Installation

Installation

Our installation process is methodical and detail-driven. We use approved materials, reliable workmanship, and installation practices that prevent future leaks, drainage issues, or code violations. Whether we’re running new water lines, building out a complete sewer and drainage system, or installing gas lines for appliances and water heaters, we do the work cleanly and correctly. Our fully stocked service vehicles and experience in both residential and light commercial plumbing help keep projects on schedule.

Final Inspection

Final Inspection & Approval

Every new construction or ADU plumbing project must pass inspection, and we prepare all work accordingly. We coordinate with inspectors, ensure all components meet required standards, and make adjustments if needed. The result is a fully approved plumbing system that’s ready for long-term use.

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