How Much Does It Cost To Rough-In Plumbing For A Bathroom?

Last Updated on March 8, 2021 by

Plumbing for a bathroom includes running the lines to several drains and water outlets. It also involves installation of fixtures such as sinks, faucets, and toilets. There are many varieties and styles of these items, and some bathrooms use fewer or more fixtures than others. There is a wide range of costs for plumbing a bathroom due to these reasons. The scope of the national average is $ 2,000 to $ 10,000.

Most homeowners pay about $ 5,259 to install a new shower system, toilet, faucet, sink, and two-piece tub. A small half-tub bath can cost as low as $746. In contrast, a deluxe bathroom that has two designer sinks, toilet, whirlpool bathtub, medicine cabinet, a maple vanity cabinet, and a neo-angle shower stall will cost around $15,007

Bathroom Remodel Plumbing Cost

Average cost
National average$ 5,259
Average $2,000 – $ 10,000
Minimum $746

Cost Of Plumbing A Bathroom As Per The Kind Of Fixture

The significant part of plumbing a bathroom is installing new fixtures. A larger bathroom requires more fixtures than a small one leading to a higher cost. This cost is determined by the materials used and their quality. Each fixture has its purchase and installation costs as explained here;

Bathroom Faucet

There are many styles, sizes, and configurations of bathroom faucets. There are both small center-set faucets and sophisticated waterfall fixtures that have LED lights.  You may get faucets from the plumbers or buy from supply stores. The cost of taps and their installation ranges from $225 to $475.

Installation Of Sink

There are varieties of bathroom sinks to choose, and each comes with a different cost. You may select wall-hang, pedestal, consoles, or sinks installed in a vanity. These sinks come in various styles and materials, giving a wide range of cost of from $300 to $5,500 on average. Drop-in sinks in a vanity have the lowest price, while console sinks have the highest price.

Cost Of Installing Toilet

Each bathroom requires a toilet, and there are a variety of these fixtures to choose from. You can pick one-piece, two-piece, elongated, round-front, or pressure-assisted toilet for water-saving when flushing. Depending on the material, color, make, or model, toilet fixtures have a wide range of costs. But, on average, the value of the toilet and its installation ranges between $350 and $3,500.

Installation Of A Bathtub

There are also various options when it comes to bathtubs depending on your taste and bathroom size. The cost of bathtubs ranges from $ 1,500 to $2,900 depending on the size and model. You can get a small fixture or alcove installations. They may include a stand-alone or shower model that has an air bath and chromotherapy. 

Cost Of Installing A Bidet

Bidets are becoming popular with the majority of people choosing to have them in their bathrooms. The fixtures let you replace toilet paper, keep you tidy, and reduce the environmental impact. There are a few models of bidets you can choose from including floor and wall-mounted as well as different faucet configurations. Bidets costs and their installations range from $500 to $2,750.

Installation Of Shower

Showers are standard fixtures in most bathrooms. The cost of installing showers depends on the type for example if you tile with porcelain or ceramic, it will have a different price from acrylic. The minimum plumbing involves a showerhead, valve and a drain. You may also ask your plumber to fix enclosures, body sprays, and performance shower feature.

You can call in other experts to do waterproofing, tile, and flooring. A plumber charges an average of between $1,500 and $3,500 to install a shower enclosure. 

How Much Does It Cost To Move Bathroom Plumbing?

While doing a bathroom remodel, it is common to change the room’s footprint. When you do this, a new space opens up, and the layout works better for your family. The process is not without cost since you will have to pay for different plumbing lines and drains to be moved. It will also cost you to have various fixtures installed.

Here are some of the costs you will incur:

Moving A Washing Machine

If your washing device was in the bathroom and you need it moved, you will require a new line. Running a line to where the washing machine will be costs around $160 to $400 while the parts cost $170 to $500. These costs are for plumbing as most plumbers will not handle or install the device.

Relocating A Plumbing Stack

A stacked line helps a plumbing system to vent. The majority of low-flow toilets use the stack line to vent air before flushing. Doing this creates a vacuum to help pull the waste without a lot of water. The cost of relocating a stack lies between $200 and $400 per stack. However, this cost may be higher if your roof is very steep. When the parts are included, the price goes to around $250 to $450.

Cost Of Moving Sink Plumbing

If you are relocating your bathroom sink or you want to add another sink to a wall, a new line has to be installed. Each sink requires three lines with each line costing on average between $80 and $200. The cost of installing a new sink depends on the style and type but ranges from $540 to $6,100.

Cost Of Relocating A Toilet

Moving a toilet requires you to have a new waste and water line. These lines have different sizes and installation types. This process costs between $200 and $400 to move and $550 to $3,900 to install.

Concrete Slab

Moving a concrete slab is an expensive process since it needs breaking up to reach the plumbing. Besides incurring the cost of running a new line, there are additional labor charges. Depending on the thickness of the slab and the plumbing type, the price ranges from $550 to $1,500.

Relocation Shower Plumbing

If you think of changing the layout of your shower or relocating it entirely, three lines will be moved. These lines are the cold and hot water lines as well as the drains. The cost of moving one line lies between $80 and $200, and the total cost of relocating and installing a new shower on average is $1,740 to $4,100

What Is Included In Plumbing Rough-In?

There are two types of rough-in, i.e. plumbing and electrical:

A Plumbing Rough-In 

This type of rough-in includes running all drain pipes and water supply through bored holes in the studs. It also includes connecting all lines and other framing members. At this stage, however, no fixtures such as faucets or sinks have been installed. 

An Electrical Rough-In 

This rough-in means that all cables (electrical) have been hauled through the studs. The wires are also pulled through other framing members. They are inserted into ceiling boxes and walls. The outlets, lights, switches, and other gadgets are not fixed. 

How Much Does It Cost To Rough-In A Basement Bathroom?

Plumbers charge different rates depending on the region. But on average, a basement bathroom costs from $1,200 to $2,000. Adding a basement bathroom is a massive project that can be complicated at times. The hard part of plumbing this project is the installation of waste, drain, and vent system.

This work involves hard labor, such as breaking up concrete. You must also ensure that the construction is perfect so that the waste will be carried away without any hitches. The materials for the waste, drain, and vent cost around $250. Basement bathroom plumbing needs to be connected to the existing vent and drain lines in the ceiling and floor to complete the rough-in plumbing.


Rough-in plumbing in the bathroom is an essential process as it determines how your bathroom works. The cost depends on various factors such as fixtures, their type as well as whether you are relocating your bathroom or building a new one. It is necessary to do due diligence before carrying out the process and compare the plumber’s charges.

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