Plumbing System Installation in Huntington Beach, CA
We deliver superior plumbing system installation services precisely engineered for Huntington Beach ADUs and garage conversions. Our master plumbers bring decades of collective experience to ensure your water supply, drainage, and fixture systems function flawlessly from day one.
Modern ADU and garage conversion plumbing demands specialized knowledge of both current building codes and innovative space-saving solutions. We expertly handle everything from water line connections and sewer tie-ins to fixture placement and water heater installations—all while maximizing every square inch of your valuable living space.
What distinguishes our plumbing installations is our meticulous planning process. Before breaking ground, we thoroughly analyze your property's existing water pressure, drainage capabilities, and connection points to design the most efficient system possible. Our team navigates Orange County's complex permitting requirements seamlessly, ensuring your project moves forward without costly delays.
We prioritize quality materials that withstand coastal conditions while implementing water-conserving fixtures that reduce your environmental footprint and utility costs. Every pipe, joint, and connection undergoes rigorous pressure testing before receiving our quality guarantee.
Choose Refined ADU Builder & Garage Conversions for plumbing systems engineered to deliver reliability, efficiency, and peace of mind. We ensure your ADU or garage conversion receives plumbing infrastructure that enhances both comfort and property value for years to come.
Our Installation Process
Our approach ensures every plumbing system is tailored to site conditions, installed with durable, high-grade materials, and rigorously tested for reliability and safety. Each step is designed to deliver long-lasting performance and compliance with local codes.
1. Site Assessment and Planning
We begin by thoroughly evaluating your property to understand existing conditions, layout constraints, and access points. This helps us design a plumbing system that optimizes water flow and minimizes disruptions during installation.
During this phase, we also identify any potential challenges such as soil conditions or space limitations. We integrate local building codes and homeowner specifications into our detailed plan to ensure everything meets regulatory standards before work begins.
Clear communication is key. We provide a precise timeline and material list upfront, so you know what to expect throughout the project.
2. High-Quality Component Installation
We use only industry-approved materials and fixtures suited for the specific application, focusing on durability and efficiency. From pipe selection to fitting installation, every component meets performance and safety requirements.
Our skilled technicians follow best practices for sealing joints, routing pipes, and securing connections. This reduces the risk of leaks and ensures proper water pressure throughout the system.
We also pay special attention to critical connections like main water supply lines and drainage to avoid future problems. Work areas are kept clean and organized, reflecting our commitment to professionalism.
3. System Testing
After installation, we conduct a comprehensive series of tests to verify the system’s integrity. Pressure tests identify leaks, while flow rate checks confirm proper function according to design specs.
We inspect every valve, fixture, and connection to ensure they operate as intended. Any issues detected are corrected before project completion.
Documentation is provided, including test results and compliance certificates, giving you peace of mind that your plumbing system is both safe and fully operational.

Our Services
We provide a full range of plumbing installation services tailored to meet specific needs. Our approach includes precise system design, quality material selection, and experienced installation for both new builds and conversions.
Residential and Commercial Solutions
We handle plumbing installations for homes and businesses with equal expertise. Our team ensures installations comply with local codes and regulations, focusing on durability and efficiency.

For residential projects, we install water supply lines, drain systems, and fixtures suited to everyday use. Commercial plumbing requires handling more complex systems, such as high-capacity water heaters and fire suppression lines.
Custom System Design
We design plumbing systems based on a detailed assessment of the property’s layout and usage requirements. Our designs optimize water flow and reduce the risk of leaks or pressure issues.
Material choice is critical. We provide options like copper, PEX, and PVC, explaining their pros and cons. Our selections are made to ensure longevity, cost efficiency, and compliance with Huntington Beach building standards.
ADU Plumbing Installations
We specialize in plumbing for new construction projects, including accessory dwelling units (ADUs) and garage conversions. Our process integrates with general building work to streamline timelines.
For ADUs, we install fully independent plumbing systems with appropriate hookups for kitchens, bathrooms, and laundry. We ensure all installations support the intended use and local permitting requirements.
Why Choose Us
We focus on skilled workmanship, compliance with local codes, and ensuring that every client is fully satisfied with their plumbing system installation. Our team brings experience and a commitment to quality that sets us apart in Huntington Beach.
Licensed and Experienced
All our plumbers are fully licensed and carry the necessary certifications to work in California. This means we meet or exceed all state and local licensing requirements. We bring years of hands-on experience installing plumbing systems for ADUs and garage conversions. Our team understands the unique demands of these projects and can handle everything from water supply lines to drainage with precision.
Standard Compliance
We are deeply familiar with Huntington Beach’s municipal codes and building regulations. This knowledge helps us avoid delays and ensures your project passes inspections smoothly. We tailor our installations to fit local environmental and safety requirements, including water conservation standards important in California. Our focus is on durability and compliance, minimizing future issues.
Customer Satisfaction
Our work is backed by a clear commitment to your satisfaction. We communicate openly at every stage of the installation, addressing concerns promptly. We offer warranties on both materials and labor to protect you after the project’s completion. If issues arise, we respond quickly to resolve them with minimal disruption.
FAQS on Plumbing System Installation
We understand that timing is crucial when planning plumbing system installation for an ADU. Below, we provide specific details to help set clear expectations for the process duration and factors affecting the timeline.
How much does plumbing installation cost for an ADU in Huntington Beach?
Plumbing installation for an ADU in Huntington Beach typically costs between $5,000-$15,000. This price varies based on several factors including the size of the unit, number of fixtures (bathroom, kitchen, laundry), distance from existing plumbing lines, and whether you need sewer line modifications. Complex installations with multiple bathrooms or special fixtures will fall on the higher end of this range.
Do I need special permits for plumbing in my garage conversion in Orange County?
Yes, plumbing permits are absolutely required for garage conversions in Orange County. All new plumbing work must be permitted through the local building department, with separate approvals often needed for connection to sewer lines or water mains. These permits ensure your plumbing meets California Plumbing Code requirements and is properly inspected before walls are closed up.
Can my existing plumbing system support an additional bathroom in my ADU?
This depends on your current plumbing infrastructure. Key factors include your water line size (typically 3/4" is minimum for supporting additional bathrooms), your home's water pressure, drain line capacity, and sewer connection limitations. A professional assessment is necessary to determine if you need upgrades like larger supply lines, pressure regulators, or sewer line modifications to support the additional fixtures.
How long does plumbing installation take for a new ADU in Huntington Beach?
Plumbing installation for a new ADU typically takes 5-7 days for the rough-in phase and an additional 2-3 days for fixture installation. However, the complete process including permitting, inspections, and potential utility coordination can extend the timeline to 3-6 weeks. Factors affecting the timeline include complexity of the installation, availability of materials, and inspection scheduling.
What plumbing code requirements must ADUs meet in California?
ADU plumbing in California must comply with the California Plumbing Code, which includes:
- Water-conserving fixtures (1.28 GPF toilets, 2.0 GPM showerheads)
- Proper venting for all drain lines
- Anti-scald protection in showers and tubs
- Backflow prevention devices where required
- Minimum pipe sizing for supply and drain lines
- Access panels for valves and cleanouts
- Proper pipe insulation
- Water heaters with seismic strapping
- ADA-compliant fixtures if required by local ordinances
All work must be performed by licensed plumbers and pass multiple inspections during the construction process.