If you're planning a bathroom remodel, chances are you've run into the term "plumbing rough in" and wondered what it's going to set you back. I've been on both sides of this — as a contractor quoting jobs and as a homeowner writing the checks. The plumbing rough in cost per fixture is one of those numbers that can vary wildly depending on your house, your plumber, and how much drywall you're okay with tearing out. Let me break it down.

What Plumbing Rough In Actually Means

Rough in is the part of the job where the pipes are run inside the walls and floor before the walls get closed up. For a bathroom, that means supply lines, drain lines, and vent runs for each fixture: sink, toilet, shower, tub. The rough in cost per fixture covers material (pipe, fittings, valves) and labor to run those lines from the main stack to the fixture location. I've seen homeowners get sticker shock because they thought rough in was just "connecting the faucets" — no, that's the finish. Rough in is the hidden work.

Rough In Costs by Fixture Type

Here's what I've seen in the Philly market over the past few years. Prices will vary by region, but these numbers give you a solid ballpark.

• Toilet rough in: $150 to $350 per fixture. Most toilets use a 3-inch drain line, and if you're moving the toilet more than a foot or two, add a vent. A standard toilet rough in is usually straightforward unless your joists run the wrong way.
• Sink rough in: $100 to $250 per sink. Bathroom sinks use 1.5-inch drains and 1/2-inch supply lines. Vanity sinks are typically easy. Pedestal sinks can be trickier because the drain has to come up through the floor exactly.
• Shower rough in: $200 to $500 per shower. This includes the valve body and diverter rough in, plus the drain and supply lines. If you're doing a curbless shower with a linear drain, expect to pay more — linear drains require extra venting and precise floor slope.
• Bathtub rough in: $150 to $400 per tub. A standard tub with a single faucet set is on the lower end. A soaking tub or whirlpool tub with a pump gets pricier.
• Bidet or washlet: $100 to $200. If you're adding a bidet with hot water, that's another supply line.

Keep in mind these numbers are just for the rough in. The finish plumbing (faucets, trim, toilet installation) is extra.

Why Labor Varies So Much

The biggest factor in plumbing rough in cost per fixture is accessibility. If your bathroom is on the first floor over a basement or crawlspace, the plumber can work from below without opening up ceilings. That's cheap. But if you're on a slab on grade or in a second-floor bathroom with finished rooms below, they'll have to cut into walls and ceilings, patch drywall, maybe move electrical. That doubles or triples the labor hours. I had a row house job in Fishtown where we had to run a new vent through a steel beam — that one fixture cost more in labor than all three fixtures combined in a different house. The plumbing rough in cost per fixture on that job was nearly $600 per fixture because of the distance and obstacles.

What's Not Included in Rough In Quotes

Don't assume a rough in quote covers everything. Drywall repair, tile work, paint touch-ups — those are separate. Some plumbers will give a turnkey price that includes basic patch work, but most won't. Always ask. Also, understand that the plumbing rough in cost per fixture typically does not include the finish trim kits, faucets, or the toilet itself. Those come later. And if your house has galvanized pipes that need to be replaced, that's another line item entirely.

How to Keep Rough In Costs Under Control

Here's the straight talk: if you can keep your fixture locations close to the existing stack, you'll save. Moving a toilet more than 3 feet from the main vent requires an additional vent — that's extra pipe and labor. Grouping your fixtures around a central wall can cut your plumbing rough in cost per fixture by 20-30%. Also, avoid moving drains through joists that are undersized; you may need a structural engineer. And don't cheapen out on valves. I've seen too many homeowners save $20 on a shower valve rough in, only to have it fail five years later. Stick with names like Moen, Delta, or Kohler — their rough in brackets are better designed and replacement cartridges are easy to find. The rough in cost per fixture might climb $30, but it'll save you a headache.

Do You Need a Permit?

Most municipalities require a permit for any plumbing rough in that changes drain lines. In Philly, it's about $150 for a plumbing permit. Don't skip it — if you ever sell, a home inspector will catch unpermitted work, and insurance might not cover a leak from unpermitted plumbing. Factor that permit fee into your overall budget.

Bottom Line

On average, for a full bathroom with a toilet, sink, shower, and tub, you're looking at $700 to $1,500 just for the rough in labor and materials. The plumbing rough in cost per fixture will land around $200 to $400 per fixture depending on complexity. But the real variable is your house — not some table you found online. If you're planning a remodel, call three local plumbers, ask them to walk the job, and get firm quotes. And remember: a bathroom built right once is a bathroom you forget about. That's the point.