CostKit
State Guides7 min readMay 16, 2026

Average Plumbing Rough-In Cost by State (2026)

Copper plumbing pipes forming a clean geometric pattern on a dark background

Plumbing rough-in is one of the line items where state-to-state cost spread is widest. A 2,000 square foot single-family home gets a plumbing package that runs roughly $5,000 to $14,000 nationally — but the same scope in Mississippi or West Virginia is half what it costs in California or New York, and the gap has nothing to do with the pipe.

The driver is labor. Licensed plumbers are scarce in tight markets, union wages dominate urban metros, and code-driven requirements (sealed combustion appliances, expansion tanks, backflow preventers) layer on top of base labor. This guide gives you a feasibility-grade range for every state plus the cost drivers that move the number on a real bid.

Where it's cheapest, where it's most expensive

Cheapest 4 states

  1. Mississippi · $4,600–$9,900
  2. Arkansas · $4,800–$10,400
  3. West Virginia · $4,800–$10,400
  4. Indiana · $5,000–$10,700

Most expensive 4 states

  1. California · $11,700–$25,200
  2. Hawaii · $11,000–$23,800
  3. New York · $9,700–$20,800
  4. Alaska · $9,700–$20,800

2026 plumbing rough-in cost by state

2026 plumbing rough-in cost for a typical 2,000 sq ft single-family home, by state. Includes water supply, drain-waste-vent, gas lines, and fixture connections — labor and materials, contractor direct cost.
StateTotal cost (2,000 sq ft home)
Northeast
Connecticut$8,300–$18,000
Maine$7,500–$16,000
Massachusetts$9,200–$19,900
New Hampshire$7,900–$16,900
New Jersey$8,600–$18,400
New York$9,700–$20,800
Pennsylvania$6,600–$14,100
Rhode Island$8,200–$17,700
Vermont$7,900–$16,900
Midwest
Illinois$6,300–$13,700
Indiana$5,000–$10,700
Iowa$5,400–$11,600
Kansas$5,200–$11,300
Michigan$5,600–$12,000
Minnesota$6,600–$14,100
Missouri$5,300–$11,400
Nebraska$5,500–$11,700
North Dakota$6,100–$13,200
Ohio$5,400–$11,600
South Dakota$5,700–$12,300
Wisconsin$6,100–$13,200
South
Alabama$5,100–$11,000
Arkansas$4,800–$10,400
Delaware$7,000–$15,100
Florida$6,200–$13,400
Georgia$5,500–$11,900
Kentucky$5,200–$11,100
Louisiana$5,500–$11,900
Maryland$7,400–$15,900
Mississippi$4,600–$9,900
North Carolina$5,400–$11,600
Oklahoma$5,100–$11,000
South Carolina$5,300–$11,400
Tennessee$5,200–$11,100
Texas$5,900–$12,800
Virginia$6,300–$13,700
West Virginia$4,800–$10,400
West
Alaska$9,700–$20,800
Arizona$6,900–$14,900
California$11,700–$25,200
Colorado$8,200–$17,700
Hawaii$11,000–$23,800
Idaho$6,800–$14,600
Montana$7,100–$15,300
Nevada$7,100–$15,300
New Mexico$6,200–$13,400
Oregon$7,900–$16,900
Utah$7,300–$15,700
Washington$8,700–$18,700
Wyoming$6,900–$14,900

Methodology: ranges are state-cost-adjusted from a national trade baseline and reflect typical contractor direct cost (labor + materials, before overhead). Use them for feasibility-grade scoping, not as a binding quote. For a project-specific estimate, generate one free in under 60 seconds.

What moves plumbing cost on a real job

Fixture count. The state range assumes a typical 2.5-bath home with kitchen, laundry, and water heater. Each additional full bath adds roughly $1,800–$3,200 in rough-in plus another $1,200–$2,500 in finish plumbing (faucets, valves, trim).

Material choice. PEX is cheapest and fastest to install. Copper runs 20–35% more in materials but is still common for gas lines and in jurisdictions that require it. Cast iron drain-waste-vent in older urban code areas can add $1,500–$3,000.

Slab vs crawlspace vs basement. Slab-on-grade is most expensive for plumbing because every fixture drain has to be set before the pour. Basements with overhead service are cheapest. The same fixture count can vary 15–25% on this factor alone.

Local code amendments. Backflow preventers on irrigation, expansion tanks at the water heater, and sealed-combustion venting are required in some jurisdictions and optional in others. Add $400–$1,200 to your state baseline in code-strict markets — see our climate zone cost impact guide for the energy-code overlay.

Labor market tightness. Plumbers are one of the trades most sensitive to local demand because their work blocks framing inspections and drywall. When the market is hot, plumbing sub rates lead the spike — read why local permit activity should be on your bid sheet for the leading-indicator approach.

Frequently asked questions

What does plumbing rough-in include?
Rough-in covers everything installed before drywall: water supply lines (hot and cold), drain-waste-vent (DWV) piping, gas lines for the range and water heater, and fixture stub-outs at every drain and supply point. It does not include the fixtures themselves (toilets, sinks, faucets, tubs) which are part of the finish phase.
Why is plumbing more expensive in some states?
Three reasons: licensed plumber wages vary by 2–3× across states, code requirements differ (some jurisdictions mandate expensive backflow preventers, sealed-combustion venting, or specific pipe materials), and local labor market demand can push rates 15–30% above the published wage. California, Hawaii, Alaska, and the Northeast are consistently most expensive; the Deep South and rural Midwest are consistently cheapest.
Should I bid PEX or copper?
PEX is faster to install, requires fewer connections, freezes more forgivingly, and saves 15–25% on materials. It's the default for most residential new construction in 2026. Copper is still required for gas lines in many jurisdictions and preferred by some buyers for branding/durability reasons. For a remodel where you're tying into existing copper, matching makes inspection easier.
How much does plumbing add per additional bathroom?
Adding a full bathroom to a planned 2,000 sq ft home typically adds $2,800–$5,200 to the plumbing total ($1,800–$3,200 rough-in plus $1,000–$2,000 finish trim). Half-baths add about half that. Bumping from a 2-bath to 3-bath plan is usually the cheapest way to add a bathroom because the new fixtures share existing vent stacks.
Is the state-level range accurate for a remodel?
The state table is calibrated for new construction. Remodel plumbing usually costs 20–40% more on the same fixture count because you're working around existing framing, snaking lines through finished walls, and often replacing dated DWV piping. For a kitchen remodel specifically, plumbing alone runs $2,500–$6,000 depending on whether you move the sink and dishwasher locations.

How CostKit prices plumbing

When you generate an estimate in CostKit, the plumbing phase line uses your state's labor wage data (US Bureau of Labor Statistics OEWS, current to this year), regional material price multipliers, climate-zone code overlays, and the project-specific scope you described in the wizard. Try it on your next bid — generate a free estimate in your state and compare the plumbing line to the table above.

Related

The cost ranges above are state-level averages. Three things move the number for a specific project: the local labor market right now (see permit activity and labor demand), the climate zone you're building in (see climate zone cost impact), and whether the address sits in a hurricane, flood, or seismic overlay (see coastal construction overhead).

For broader benchmarks, see our cost per square foot by state breakdown and construction labor rates by state guide.

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