What Plumbing Services Do I Need for a New Construction Project?
A new build needs plumbing design, sewer and water hookup, rough-in piping, water heater and gas line install, fixture setup, and a final city inspection.
Starting a new home in Beaverton, Portland, or Hillsboro brings a lot of moving parts. The plumbing side alone can feel like a wall of questions. What gets done first? Who pays for what? How do you avoid a costly redo? This plumbing guide answers what plumbing services do I need for a new construction project? in plain words. You will get the full scope, the right order, real Oregon costs, and tips to pick the right pro before any pipe (fluid conveyance) goes in the ground.
Key Takeaways
A new construction project needs design, rough-in, fixture setup, and a final inspection.
Oregon building codes ask for permits and two main inspections before move-in.
Full new construction plumbing runs $12,000 to $38,000 in the Portland area.
A licensed plumber keeps your plumbing system safe, code-ready, and built to last.
AllScope Plumbing and Construction, Inc. handles the full construction process from blueprint to sign-off.
What Plumbing Work Does a New Construction Project Need?
A new build needs six main plumbing systems: water supply, drains, sewer, gas, water heating, and fixtures.
Every Oregon home build follows the same path. Your plumber maps the plumbing layout, runs drain and water lines, sets the water heating unit, and fits each plumbing fixture in the kitchen, bathroom, and laundry room. The construction project also needs gas lines for stoves and heaters. Vent stacks allow air to enter the system for safe drain flow.
The 7 Core Plumbing Services Every New Build Needs
The 7 core services are design, sewer hookup, underground rough-in, above-ground rough-in, water heater, fixture install, and final inspection.
Each step builds on the one before it. Skip a step and you pay later in repairs or failed inspections.
Plumbing Plan and System Design
The first step is a full plumbing layout that matches your blueprints and Oregon code.
Your plumber draws every water line, drain, and vent before any work starts. The design sets fixture spots, pipe sizing, and water pressure needs. Smart proper planning here saves you from costly changes later. Need help with this stage? Our plumbing design and repiping team can help.
Sewer and Water Line Hookup to the Main
This step ties your home into the city water main and the sanitary sewer line.
Crews dig a trench from your home to the street. They lay heavy pipes for water supply and sanitary sewer flow. Beaverton and Hillsboro sit on heavy clay soil, so trenches need extra care. Local code sets line depth to guard against freeze damage in cold months.
Underground Rough-In Plumbing
Underground rough-in lays all drain lines under the slab before concrete is poured.
This stage covers drain (plumbing) lines for toilets, showers, and floor drains. The plumber sets storm drain ties and waste lines in the right spots. Once concrete is set, fixing a missed line costs thousands. Crews need to finish this work fast and right the first time.
Above-Ground Rough-In (Walls and Ceilings)
Above-ground rough-in runs all supply lines, drains, and vents through the wall studs after framing.
This is the heart of plumbing for new construction in any Oregon home. Crews drill holes, set hangers, and pressure-test every joint. The city must approve this rough-in before drywall goes up. A failed test means tear-out, so good crews check twice.
Water Heater and Gas Line Installation
This stage sets the water heater and runs gas lines to the unit, stove, and dryer.
You pick tank or tankless, gas or electric. Tankless units save space and help with energy conservation. Gas lines need pressure tests and city sign-off. Oregon code sets venting rules for safety and efficient energy use in every Portland-area home.
Fixture Installation (Sinks, Toilets, Tubs, Showers)
Fixture install happens at the finish phase once cabinets, tile, and floors are in.
Your plumber sets every toilet, sink, shower, and tub. Each fixture ties to the supply lines and gets a shut-off valve at every spot. Plumbing fixtures and appliances like dishwashers and ice makers also get hooked up. Good fixture aesthetics match your style and last for years.
Final Inspection and Pressure Test
Final inspection is a city plumbing check plus a pressure test to catch any leaks before sign-off.
The city plumbing inspector checks every joint, every vent, and every fixture. New construction plumbing services end at this stage with a clean test result. Once the city approves, you get peace of mind and a plumbing system ready for daily use.
New Construction Plumbing Timeline
A new construction plumbing job runs across seven stages from pre-build design to final inspection.
How Much Does New Construction Plumbing Cost in Oregon?
A full new construction plumbing job in the Portland area runs $12,000 to $38,000 for an average home.
Oregon labor sits above the national average. Permit fees in Beaverton and Portland add $300 to $1,200. Read our breakdown of plumbing service cost factors for more.
PEX vs Copper vs PVC: Which Pipe Material Fits Best?
PEX works best for supply lines, copper fits main and gas lines, and PVC handles drain and waste.
Most Portland-area builds now use PEX for supply work. Copper still wins on gas lines and exposed runs. PVC fits drain and vent jobs at a low price. Corrosion rates also push more builders toward PEX every year.
What the Plumber Handles vs What the Builder Handles
The plumber owns every pipe, valve, and fixture, while the builder takes care of framing, walls, and finish work.
Clear roles save time and money on every new construction project.
5 Common Plumbing Mistakes Homeowners Make on New Builds
The most common mistakes are skipping design, picking the cheapest bid, undersizing the water heater, missing shut-off valves, and mixing pipe types.
Skipping the design phase and jumping to rough-in
Picking the cheapest bid without checking license or insurance
Choosing a water heater too small for a 4-bedroom home
Forgetting shut-off valves at every fixture
Mixing plumbing pipes without checking local code
How to Pick the Right Plumbing Contractor in Beaverton
The right plumber holds a current Oregon CCB license, full insurance, and real new build references.
Confirm an active Oregon CCB license number
Ask for proof of liability and workers' comp insurance
Get a written, line-itemed estimate before signing
Check three local references from past Portland-area builds
Ask if they are familiar with local building codes and Beaverton inspection rules
FAQs
How long does plumbing take on a new build?
Most new home plumbing runs 4 to 8 weeks across all stages. Larger custom builds with complex layouts can stretch to 10 or 12 weeks total.
When does the plumber come during construction?
The plumber starts at site prep for sewer hookup, returns for underground rough-in, then again after framing. The final visit covers fixtures and the city test.
Do I need a separate plumbing permit in Oregon?
Yes, every new build needs a state plumbing permit on top of the main building permit. Your licensed plumber should pull this paperwork.
Can I provide my own fixtures for the build?
Yes, most plumbers will install homeowner-supplied plumbing fixtures. Check the warranty rules first, since some pros only cover their own products.
What is rough-in plumbing?
Rough-in means setting all pipes, drains, and vents inside walls and under floors before drywall goes up. It forms the backbone of your plumbing system.
How should I budget for plumbing on a new home?
Plan for 8 to 12 percent of your total build cost on plumbing. A $400,000 Portland-area home usually sets aside $30,000 to $48,000 for the full job.
Plan Your New Construction Plumbing With AllScope Plumbing
Knowing what plumbing services do I need for a new construction project? keeps your build on time and on budget. Call AllScope Plumbing and Construction, Inc. at +1 503-796-1113 for a free quote in Beaverton, Portland, Hillsboro, Tigard, or Aloha. We will walk your blueprints with you.
