New Construction Plumbing in Covina, CA

Residential New Construction Plumbing

A new home, ADU, or ground-up residential project is your chance to get the plumbing exactly right without working around someone else's decisions from decades ago. We start by working through the plumbing design with you and your builder: where lines run, how many bathrooms and fixtures you'll need, water heater placement, and how the system ties into the main line. From there, our team handles rough-in plumbing during framing, runs supply and drain lines, and installs water heaters, gas lines, and any specialty systems like water filtration. Once the home is ready for finish work, we come back to install every fixture so the space is ready to move into.

What we handle for residential new construction:

• Plumbing design and layout planning
• Underground and in-wall rough-in plumbing
• Water line, gas line, and sewer/septic connections
• Water heater and tankless water heater installation
• Fixture installation (sinks, toilets, tubs, showers, faucets)
• Final walkthroughs and inspections

Commercial New Construction Plumbing

Commercial buildings put different demands on a plumbing system than residential properties, and getting the design right up front matters just as much as the installation. Our team works with architects, general contractors, and property owners to design a plumbing layout that meets code, supports the building's expected use, and holds up to commercial-level demand. From there, we handle rough-in plumbing, water and gas line installation, backflow prevention, grease traps and specialty drainage for restaurants and food service spaces, and connection to municipal water and sewer systems. As the project nears completion, we install the fixtures in restrooms, break rooms, and kitchens, as well as any specialty equipment, that get the space ready to open.

What we handle for commercial new constructions:

• Commercial plumbing design and code-compliant layout
• Rough-in plumbing for offices, retail, restaurants & multi-unit buildings
• Water, gas, and sewer line installation
• Backflow prevention and grease trap installation
• Fixture and equipment installation
• Final inspections and walkthroughs

Plumbing Remodels & Finish Work

Not every plumbing project starts with bare land. Remodeling a kitchen, bathroom, or adding onto a property often means relocating fixtures, adding new lines, or updating outdated plumbing to meet current code. Our team evaluates your existing plumbing system, plans how new work will tie in, and handles everything from rerouting supply and drain lines to adding new fixtures in spaces that didn't have them before.

Finish work is where a construction project comes together, and it's often the phase clients notice most. We install every fixture your project calls for with the same attention to detail, whether it's a single remodeled bathroom or the final walkthrough on a new building. Our team makes sure every connection is tested, every fixture is set correctly, and the space is ready for its final inspection.

What's Included with Every New Construction Project

We know new construction runs on timelines, budgets, and coordination between multiple trades. That's why every new construction project with Courtesy Plumbing includes:

• A dedicated project manager — one point of contact who knows your project inside and out, from the first walkthrough to final inspection.
• Upfront pricing — a clear scope of work and cost before we start, so there are no surprises mid-build.
• Efficient project timelines — we plan our work to keep pace with the rest of the build, not slow it down.
• Coordination with other trades — we work directly with your general contractor, electricians, HVAC teams, and inspectors to keep the project moving.

Why Choose Courtesy Plumbing for New Constructions?

New construction plumbing is a big investment, and it's not something to hand off to just anyone. Courtesy Plumbing has been a family-owned, licensed, bonded, and insured plumbing company serving Covina and the San Gabriel Valley since 1970. We bring that same experience and attention to detail to every new build, remodel, and finish job, treating your project with the same care we'd want for our own. From the first sketch of a plumbing layout to the last fixture installed, we're committed to doing it right the first time.

Call (626) 213-3112 or contact us online to learn more about our new construction plumbing services in Covina and beyond.