How Much Does It Cost to Add a Bathroom? (2023)

Sometimes a bathroom remodel isn’t enough. If your family is growing or your needs have changed, you may need an entirely new bathroom to accommodate everyone in your home. You can convert an existing room into a bathroom by adding the necessary plumbing and fixtures, or you can build an addition for your new bathroom .

Converting an existing space into a bathroom costs an average of $15,000, while constructing a new addition costs $57,000.* Learn about various cost factors and get tips for reducing your total price in our guide.

*Cost figures in this article are sourced from Remodeling Magazine, Home Advisor , and Fixr.

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Cost Factors of Adding a Bathroom

The primary factors that determine the total cost of this project are the type and size of the bathroom as well as its location in the home.

Cost by Bathroom Type

The type of bathroom you add will determine not only its approximate size but also the features it needs to contain. Obviously, a primary bathroom will cost more than a half bath . These are the most common types of residential bathrooms.

Half Bathroom

A half bath , also known as a powder room , typically contains only a toilet and sink. These are very small bathrooms that are usually 15 to 20 square feet , making them the least expensive bathrooms to add at $3,000 to $12,000.

Three-Quarter Bathroom

Small bathrooms are usually three-quarter baths containing a sink, toilet, and shower stall but no tub. They may be anywhere from 20 to 35 square feet and are typically just large enough for a small cabinet or closet. These can cost as little as $5,000 for a converted space or as much as $18,000 for a home addition.

Full Bathroom

A full bath has a sink, toilet, shower, and bathtub. Most guest bathrooms are full bathrooms , though they aren’t quite as well equipped as primary baths. These include a bathroom vanity and other cabinets and are usually between 35 and 50 square feet . A full bathroom costs $7,000 to $30,000 to create.

Wet Room

A wet room can be any size, but it’s typically either a three-quarter or full bath . What distinguishes a wet room is that the entire bathroom is waterproofed, not just the tub and shower surrounds, which accounts for the extra expense of $10,000 to $32,500. This can allow for an open plan bathroom with no need for a shower door or curtain. It can also allow you to add a showerhead to a bathroom that would otherwise be too small to accommodate a separate stall.

Jack and Jill Bathroom

Located in the space between two bedrooms with a door leading in from each, Jack and Jill bathrooms often have two sinks and individual storage spaces on either side of a shared tub and shower. It’s fairly easy to convert a third bedroom into a Jack and Jill bath, but they’re rarely constructed as additions because of the specific placement between two other rooms. You may pay anywhere from $14,500 to $54,000 for this project.

Primary Bathroom

A primary bathroom is usually the largest in a home and is accessed through the main bedroom. These bathrooms are usually between 70 and 160 square feet , with room for a double vanity or freestanding tub. You’ll pay at least $20,000 to convert an existing room into a primary bath and up to $96,000 to add one.

Luxury Bathroom

There’s no standard definition for a luxury bathroom , but they’re usually large—between 100 and 160 square feet —and full of high-end materials and fixtures. They tend to have a spa-like feel and may contain a jetted tub, steam shower, or walk-in tub shower combo . Homeowners who build luxury bathrooms may use high-quality materials such as natural stone or metal, making these bathrooms the most expensive to add. They cost at least $40,000 and as much as $192,000 or more. Here are some typical cost ranges for various types of bathrooms .

Type of Bathroom	Cost to Convert Existing Space	Cost to Build New Addition
Half bath/powder room	$3,000–$5,000	$8,000–$12,000
Three-quarter bathroom	$5,000–$7,000	$10,000–$18,000
Full bathroom	$7,000–$12,500	$14,000–$30,000
Wet room	$10,500–$17,500	$15,750–$32,500
Jack and Jill bathroom	$14,500–$22,500	$28,000–$54,000
Primary bathroom	$20,000–$40,000	$40,000–$96,000
Luxury bathroom	$40,000–$80,000	$80,000–$192,000

Cost by Bathroom Size

Larger bathrooms require more materials and labor, so cost tends to increase directly with square footage . Usually, it costs between $200 and $250 per square foot to convert an existing living space into a bathroom and $400 to $600 per square foot to build a new bathroom addition . Here’s how that works out for bathrooms of various sizes.

Square Footage	Conversion Cost	Addition Cost
20	$4,000–$5,000	$8,000–$12,000
35	$7,000–$8,750	$14,000–$21,000
50	$10,000–$12,500	$20,000–$30,000
75	$15,000–$18,750	$30,000–$45,000
100	$20,000–$25,000	$40,000–$60,000
160	$32,000–$40,000	$64,000–$96,000

Cost by Location

The cost of your new bathroom also depends how easy the space is to access, how much your home’s layout needs to be changed, and whether there’s existing plumbing . Laundry rooms are usually less expensive to convert than bedrooms or attics because they already have plumbing. With garages and basements, it will depend whether plumbing already extends to these rooms.

Location	Cost Range
Closet/beneath staircase	$3,000–$7,500
Upstairs space	$7,000–$12,500
Laundry room	$7,200–$9,800
Attic	$8,000–$20,000
Bedroom	$14,000–$40,000
New addition	$14,000–$96,000
Garage	$15,000–$30,000
Basement	$20,000–$30,000

Labor Cost

• Carpenter: $13–$39 per hour
• Plumber: $45–$200 per hour
• Electrician: $50–$100 per hour
• Drywallcontractor: $60–$90 per hour
• Flooring contractor: $60–$120 per hour
• Tiling contractor: $60–$120 per hour or $15 per square foot
• General contractor: 10%–20% of the overall cost of the project