new construction plumbing

Building something new in Longmont? Whether it’s a custom home near Prospect New Town, a home addition off a quiet street in Hygiene, or a mixed-use development downtown, the plumbing has to be right from the very first pipe. Get it wrong, and you’re tearing out slabs and drywall. Get it right, and your building runs clean and quiet for decades.

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At EP Plumbing, Heating & Air, we’ve spent years working alongside builders, general contractors, and homeowners across the St. Vrain Valley and the Front Range. We know how Longmont projects come together, how local inspectors think, and how to keep a job moving on schedule. From blueprint review to the final fixture set, we install complete water, drain, and gas systems that are built to pass inspection and last.

New Construction Plumbing Services We Offer in Longmont

From a single-family home in a new subdivision to a commercial buildout, we handle every stage of the plumbing. We read the blueprints, pull the permits, install the systems, and coordinate with your crew so nothing falls through the cracks.

Plumbing System Design and Rough-In Installation

Everything starts on paper. We review your blueprints, talk through fixture locations, and map out the most efficient pipe layout for your build. Then we handle the plumbing rough-in Longmont builders count on, setting the drain, waste, and vent lines and water supply piping inside walls and floors before anything gets closed up.

Good design saves money later. We think about pipe sizing, venting, and access before we ever cut a pipe, so your system works right the first time.

Water Supply and Distribution Line Installation

Clean, pressurized water needs to reach every fixture in the building. We install water supply lines sized correctly for the home or facility, whether that’s hot and cold runs to a kitchen and three baths or a full commercial water distribution system. We pressure test every line so you know it’s tight before the walls go up.e.

Drain, Waste, and Vent (DWV) System Installation

The DWV (drain-waste-vent) system is the backbone of any plumbing job. It carries waste out and lets air in so drains flow smoothly and gases vent safely. We install DWV piping with proper slope, venting, and cleanout access, all laid out to match your plans and meet Colorado plumbing codes.

Fixture and Appliance Hookups

After the walls and floors are finished, we come back for the trim-out, the fixture set. This is where the building really comes to life. We install and connect:

Sinks, faucets, and toilets
Tubs and showers
Dishwashers and disposals
Washing machine hookups
Outdoor hose bibs

Everything gets tested for leaks and proper operation before we call it done.

Gas Line Installation for New Builds

Need gas for a range, furnace, water heater, or fireplace? We install and test gas piping to code, with proper sizing and leak detection. It’s one of the areas where cutting corners simply isn’t an option, and we treat it that way.

Water Heater and Tankless System Installation

We install traditional tank water heaters and modern tankless systems that save space and energy. We’ll help you weigh the options based on your household size, hot water demand, and budget, then install a unit that’s ready for years of Colorado winters.

Residential

Residential new construction plumbing in Longmont covers full new home plumbing installation, kitchen and bathroom plumbing, laundry rooms, water heaters, supply and DWV systems, gas piping, and the final fixture install. We also handle plumbing for home additions in Longmont, including ADUs, basement finishes, garage apartments, and new kitchens or baths. We match your extension to the existing system and pull the right permits.

Commercial

On the commercial side, we work as a commercial plumbing contractor in Longmont on office buildings, retail spaces, restaurants, warehouses, tenant improvements, and mixed-use developments. Commercial construction plumbing means bigger distribution systems, larger sewer lines, and close coordination with architects and engineers, all things we handle every day.

new home plumbing installation Longmont CO

How the Process Works

Blueprint review and plumbing design: We study the plans and plan the layout.
Permit approvals: We pull the permits your project needs.
Underground and slab plumbing: Lines go in before the slab pours.
Rough-in installation: We set DWV and water supply lines in walls and floors.
Pressure testing and rough inspection: Everything gets tested and inspected.
Wall and floor completion: Your crew closes things up.
Fixture set and final inspection: We trim out and pass the final.

Staying in sync with your builder at each stage is what keeps a project on schedule and on budget.

What Affects the Cost

Every build is different, so we don’t quote guesswork. Costs depend on things like:

Home or building size and number of bathrooms
Fixture and water heater selections
Gas piping needs
Foundation type, slab, crawl space, or basement
Residential vs. commercial scope
Custom features and permit requirements

We evaluate your construction plans and plumbing specs, then give you a clear, upfront estimate with no surprises.

residential new construction plumbing Longmont

Why Choose EP Plumbing Services in Longmont

We’re local and we know Longmont. Our team understands Front Range weather, sudden temperature drops, and the long heating seasons that put real stress on your system. We’ve worked on everything from aging boilers in Old Town to modern radiant setups in newer builds.

We’re licensed and insured. Every EP Plumbing technician is licensed and insured in Colorado, background checked, and trained to respect your home. We leave every job site clean.

We give honest advice. We won’t push a replacement when a repair will do. And we won’t nurse along a dying boiler when a new one will save you money. You get straight answers and upfront pricing with free estimates before work begins.

We know hydronic heating inside and out. From circulator pumps and expansion tanks to zone valves and BTU sizing, we understand how the whole system works together, hydronic baseboard, radiant floor heat, and hot water boilers alike.

We respond fast. With 24/7 emergency service and same-day appointments when possible, we’re here when the heat goes out. When you call, you talk to a real professional who takes your problem seriously.

New Construction Plumbing FAQ

Frequently Asked Questions About New Construction Plumbing in Longmont, CO

New construction plumbing includes design and rough-in installation, water supply and DWV system installation, fixture hookups, gas line installation, and water heater installation. We handle everything from blueprint review through final inspections to ensure code compliance and system longevity.

A plumbing rough-in is when we install drain, waste, vent, and water supply lines inside walls, floors, and underground before walls are closed. It typically occurs during the framing stage, after slab plumbing is complete but before drywall and fixtures are installed.

Costs vary based on home/building size, bathrooms, fixtures, water heater type, gas piping needs, and foundation type. We provide free estimates after reviewing your plans, ensuring transparent pricing with no hidden surprises for your Longmont project.

Yes, we handle commercial new construction plumbing for office buildings, retail spaces, restaurants, warehouses, and multi-family developments. We coordinate with architects and engineers and manage larger distribution systems and sewer lines required for commercial projects.

Typically, an underground/rough-in inspection verifies buried piping, a pressure test confirms system integrity, and a final inspection checks fixture installation and code compliance. We coordinate all inspections with local Longmont inspectors to keep your project on schedule.

Yes, we install and test gas piping for ranges, furnaces, water heaters, and fireplaces to Colorado code. We also install traditional tank and tankless water heaters, helping you choose the right system based on household demand and energy efficiency goals.

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