Introduction
What does plumbing work actually cost? The honest answer is “it depends” — but it depends on a short list of knowable things: how many fixtures, how far the pipe has to run, PEX or copper, and your local labor market. This guide lays out illustrative cost ranges for the most common plumbing projects, from a single fixture rough-in to a whole-house repipe, so you can budget before anyone opens a wall.
Every figure below is a planning range, not a quote — regional rates and site conditions move real prices. Use them with the Plumbing Cost Calculator to assemble a project budget, then confirm with itemized local quotes. For the full estimating method behind these numbers, see the complete guide.
Per-Fixture Rough-In Costs
Per-fixture pricing is the trade’s standard unit for rough-in work: each fixture gets supply lines, a drain connection, a vent tie-in, and shutoff valves. These installed ranges assume accessible conditions — finished-wall remodels run higher.
| Fixture | Illustrative rough-in range | What drives the high end |
|---|---|---|
| Toilet | $300–$600 | Relocating the drain; floor structure work |
| Bathroom sink / lavatory | $250–$500 | Wall-hung or vessel installs; long vent runs |
| Shower | $400–$800 | Custom pan; body sprays; second showerhead |
| Tub (alcove) | $500–$900 | Cast iron or soaker tubs; access panel work |
| Kitchen sink | $300–$600 | Island venting; garbage disposal circuit |
| Dishwasher hookup | $150–$300 | New dedicated line vs. existing stub |
| Washing machine box | $350–$700 | Standpipe and drain relocation |
| Outdoor hose bibb | $150–$350 | Frost-proof valve; long exterior run |
Moving a fixture — not swapping it, but changing its location — usually costs 2–3× the in-place rate because it means new drain and vent routing. That’s the single most useful rule of thumb in this table.
Cost by Project Type
When fixtures and pipe runs are bundled into whole projects, costs cluster into recognizable bands:
| Project type | Illustrative total range | Typical scope |
|---|---|---|
| Half-bath rough-in (new construction) | $1,000–$2,000 | Toilet + sink, short runs, open framing |
| Full-bath rough-in (new construction) | $1,500–$3,000 | Toilet + sink + shower/tub |
| Bathroom remodel plumbing | $2,500–$6,000 | Same footprint: higher; relocated fixtures: higher still |
| Kitchen rough-in (new construction) | $1,200–$2,500 | Sink, dishwasher, ice-maker line |
| Water heater, tank (installed) | $1,000–$2,500 | Like-for-like swap; permit included |
| Water heater, tankless (installed) | $2,500–$5,000 | Unit + venting + gas/electrical upgrades |
| Whole-house repipe (PEX) | $4,000–$10,000 | Supply lines only; patching often separate |
| Whole-house repipe (copper) | $8,000–$15,000+ | Material and labor both higher |
Whole-house repipe is the one project where pipe footage dominates rather than fixture count — the material guide shows how the PEX-vs-copper choice alone can swing the total by thousands.
Labor vs Materials: the 40–60 Rule
Labor commonly accounts for 40–60% of the total project cost, and the split shifts predictably:
| Scenario | Labor share | Why |
|---|---|---|
| PEX repipe, open framing | ~40–45% | Fast material, easy access |
| Standard bathroom rough-in | ~50% | Balanced fixture and run work |
| Copper work, finished walls | ~55–60% | Slow material, slow access |
| Water heater swap | ~40–50% | Equipment cost is a large fixed block |
Use this as a bid-check tool: on a $6,000 quote, labor should land somewhere around $2,400–$3,600. A quote showing $800 of labor on a $6,000 job is either mislabeled or missing scope — the estimating guide explains how to read itemized quotes line by line.
What Moves the Number
Material choice
PEX supply pipe material runs roughly $0.50–$2.00/ft ($1.64–$6.56/m); copper runs $2–$4+/ft ($6.56–$13.12+/m) — and copper also installs more slowly. On a 120 m (394 ft) repipe, the material difference alone is several hundred dollars before labor is counted.
Access conditions
Open framing is the cheapest access; finished drywall adds cutting and patching; slab foundations add concrete cutting for drain work. Access difficulty is the biggest reason two identical fixture lists get different quotes.
Permits and inspections
Permit fees commonly range from about $50 to $500 and vary by jurisdiction. Water heater replacements and repipes almost always trigger permits; simple fixture swaps on existing lines often don’t. Always confirm with your local AHJ — see the code compliance guide.
Location
Plumbing labor rates vary widely by region — metro areas with high construction costs can run 30–50% above national planning ranges. Every number on this page should be adjusted to your market before it becomes a budget.
Worked Example: Pricing a Whole-House Repipe
A 120 m PEX supply repipe with 10 fixture reconnections, a $1,800 water heater, and a $1,200 drywall patching allowance, permit $300, contingency 15%.
Step 1 — Pipe. 120 m = 393.70 ft. Installed PEX at $4.50/ft: 393.70 × 4.50 = $1,771.65. Cross-check in metric at $14.76/m ($4.50 × 3.28084): 120 × 14.76 = $1,771.20 — matches within rounding.
Step 2 — Reconnections. 10 fixtures × $250 = $2,500.
Step 3 — Equipment and patching. 1,800 + 1,200 = $3,000.
Step 4 — Subtotal. 1,771.65 + 2,500 + 3,000 = $7,271.65. Labor embedded in the installed rates comes to roughly 55% — squarely in the 40–60% band.
Step 5 — Permit and contingency. 7,271.65 + 300 = 7,571.65; × 1.15 = $8,707.40 ≈ $8,707.
Practical takeaway: on repipes, the pipe footage is the budget — measure runs carefully, because every extra 10 m (33 ft) at installed rates adds roughly $150.
Mistakes That Distort Results
- Using national averages as a budget. Regional labor swings of 30–50% make unadjusted averages misleading.
- Forgetting drywall and finish repair. Repipe quotes often exclude patching — budget it separately.
- Pricing the water heater unit, not the install. Venting, gas or electrical upgrades, and the permit can exceed the unit price.
- Ignoring the relocation multiplier. Moving fixtures costs 2–3× swapping them in place.
- Comparing quotes with different scopes. One bid’s “repipe” includes patching; another’s doesn’t. Itemize before comparing.
More of these, with fixes, in the common mistakes guide.
Related Guides
- Complete Guide — the full estimating method behind these numbers.
- Formula Explained — how each cost component is calculated.
- Material Guide — PEX vs copper and what it does to your budget.
- Pro Tips — how to get better quotes and spend less.
- FAQ — quick answers to common cost questions.
Frequently Asked Questions
How much does it cost to plumb a new bathroom?
Illustrative range: $1,500–$3,000 for a full-bath rough-in in new construction (toilet, sink, shower/tub), before finishes. Remodels in finished space typically run $2,500–$6,000 depending on whether fixtures move.
How much does a whole-house repipe cost?
Illustrative range: $4,000–$10,000 for PEX and $8,000–$15,000+ for copper on a typical single-family home, before drywall patching. The worked example above landed at about $8,707 including permit and contingency.
How much does water heater installation cost?
Illustrative ranges: $1,000–$2,500 installed for a conventional tank unit (like-for-like swap), $2,500–$5,000 for tankless including venting and utility upgrades, plus permit fees that vary by jurisdiction.
Why is plumbing labor so expensive?
Because it’s skilled, licensed work in difficult conditions — soldering or expanding joints in tight spaces, pressure-testing, and coordinating inspections. Labor at 40–60% of total is normal, not a markup.
Does moving a toilet really cost that much more?
Yes — relocating a fixture typically costs 2–3× swapping it in place, because the drain and vent must be rerouted. On a slab foundation it can cost more, since concrete cutting is involved.
Are these prices the same everywhere?
No. Regional labor rates can shift every figure on this page by 30–50% or more. Treat them as planning ranges and confirm with local itemized quotes.
Get Your Number
Cost guides get you into the right neighborhood; your project gets you to the address. Take the ranges above, adjust for your market and access conditions, and run your fixture list and pipe measurements through the Plumbing Cost Calculator for a project-specific budget — then get two or three itemized quotes to pin it down.
Disclaimer: All prices in this guide are illustrative planning ranges, not quotes. Actual plumbing costs vary with regional labor rates, site conditions, material choices, and permit requirements. Consult a licensed plumber and your local building authority for project-specific pricing and code decisions.
