Bathroom Addition Cost
The average cost to add a bathroom addition to an existing space is $7,600 with some homeowners paying as little as $2,500. The cost to build a new bathroom addition to your house will cost around $22,000 on average, or $47,000 to $87,000 on the high-end.
|National Average Cost||$7,600|
Table Of Contents
- Bathroom Addition Cost
- Average Cost To Add A Bathroom
Average Cost To Add A Bathroom
Overall you should be able to add a simple bathroom for as low as $2,500 by remodeling existing space or about $22,000 for a new addition. No matter where in the home you are adding a bathroom, the cost will mainly depend on whether you are using existing space within the home or building onto the house. 
Cost To Add Bathroom To Existing Space
The average homeowner spends about $7,600 for turning existing space into an 80–100 square foot bathroom.  Whether you’re adding a bathroom in the back of the house to use as a mudroom, or in the master bedroom to use as an en-suite bathroom, additional bathrooms add to your home’s value and increase convenience. If you spend $47,400 on an upscale bathroom remodel, it will increase add value to your home by about $28,700. 
Cost To Add Bathroom To A Basement
Adding a new basement bathroom costs up to $15,200 for a 6×8 powder room with 8-foot high ceilings. Plumbing labor fees add $720 to $1,350 for setting up a new sewage-ejector system that moves your waste water up and out of the basement area. Most costs for other bathroom fixtures in a basement are about the same as in other bathrooms.
Bathroom Addition Cost Estimator
|Fixture||Installed Average||Lowest to Highest|
Bathroom Addition Cost Factors
Many variables affect how much your bathroom addition will cost such as:
- Location – If the new bathroom is near existing plumbing, it will cost less than if you need to bring plumbing, vents, and waste lines to the new bathroom.
- Size – Will you need to knock out walls to make room for the new bathroom or will it go into an unused walk-in closet? Most bathroom additions are inside the home, meaning you won’t have to build out a foundation or add a roof to it.
- Scale – Will this be a practical bathroom or a luxe addition to the master bedroom?
- Age of your home – Will the plumbing or electrical work need to be updated before the addition can proceed?
- The unknown – Once you begin opening walls and looking into attics, crawlspaces, or basements, you