How Much Does it Cost to Add a Bathroom

How much does it cost to add a bathroom? According to HomeAdvisor, the average cost of a new bathroom addition is $35,000, but it may range between $20,000 and $90,000.

How Much Does it Cost to Add a Bathroom

Cost of Bathroom Addition

A bathroom addition to an existing space costs on average $7,600, although some homeowners spend as low as $2,500.

The average cost of adding a bathroom to your home is roughly $22,000, but may range between $47,000 and $87,000 on the high end.

Average Cost to Adding a Bathroom

National Average Cost $7,600
Minimum Cost $2,500
Maximum Cost $25,000
Average Range $4,500 to $12,400

How Much Does It Cost To Add A Bathroom?

In general, you should be able to install a modest bathroom for as little as $2,500 by modifying existing space or around $22,000 through new construction.

Regardless of where in the home you add a bathroom, the cost will mostly rely on whether you utilise existing space or expand on to the property.

Cost To Add A Bathroom To An Existing Space

The typical homeowner spends around $7,600 to convert an 80–100 square foot area into a bathroom.

Whether you add a bathroom to the rear of the house to serve as a mudroom or an en-suite bathroom to the master bedroom, extra bathrooms boost the value and convenience of your property.

If you spend $47,400 on an upmarket bathroom makeover, you will add around $28,700 to the value of your property.

Cost To Add A Bathroom To A Basement?

A new basement bathroom may cost up to $15,200 for a 6x8 powder room with eight-foot ceilings.

Plumbing labour costs range from $720 to $1,350 for installing a new sewage-ejector system that transports waste water up and away from the basement area.

The majority of the expenditures associated with other bathroom fixtures in a basement are comparable to those associated with other bathrooms.

To Summarize
A new basement bathroom with a 6x8 powder room may cost up to $15,200. A new bathroom installation costs on average $7,600, with the majority of homes spending between $4,500 and $12,400.

Factors Affecting the Cost of a Bathroom Addition

Numerous elements influence the cost of your bathroom expansion, including the following:


If the new bathroom is close to existing plumbing, it will be less expensive than if you have to relocate plumbing, vents, and waste lines.


Will you need to take down walls to accommodate the new bathroom, or will it be located in an underutilised walk-in closet? The majority of bathroom expansions take place within the house, which eliminates the need to extend the foundation or install a roof.


Is this a functional bathroom or a luxurious addition to the master suite?

Your home’s age

The plumbing and electrical systems need to be renovated prior to beginning the addition.


Architects charge between $100 and $250 per hour to design bathrooms.


Once you begin removing walls and inspecting attics, crawlspaces, and basements, you may encounter some unforeseen issues. It is possible that there is mould in the walls or that there is a water leak.

You may discover bugs or asbestos. It’s a good idea to budget for the unexpected. If nothing surprises you, you may utilise the additional funds to enhance one area of your bathroom expansion.

Costs of a New Bathroom Installation

The average cost of a new bathroom installation is $7,600, with the majority of homeowners paying between $4,500 and $12,400 when renovating an existing facility.

The ultimate cost will vary depending on the size of the bathroom (half or full) and the quality of the materials utilised.

Installation Cost for New Bathroom

Fixture Installed Average Lowest to Highest
Shower/Tub $500–$1,000 $400–$3,900
Tile $4–$7/SF $4–$9/SF
Toilet $250–$400 $270–$3,200
Sink/Vanity $180–$550 $200–$4,600
Flooring $4–$8/SF $2–$100/SF
Plumbing $800 $600–$1,200
Electrical Work $500 $350–$700

Cost of Shower or Tub Installation

A shower/tub combination may be installed for between $800 and $2,900 during a bathroom makeover.

The cost of further installations may be calculated using the plumber’s hourly rate of $140.

Many bigger bathrooms have a separate shower and tub, whereas smaller bathrooms combine the two into a single area.

If you’re determined to build a bathtub, keep in mind that a complete cast iron or steel tub will add 400 pounds to the floor load, and your home’s floor joists are unlikely to withstand the strain.

“Reinforce the floor joists and install cross-bridging between joists when installing a tub. Additionally, you may need to double the studs. Even a small shower stall may place undue strain on floor joists that were not meant to support bathroom equipment.”

Lowe’s charges the following:

  • Showers as tiny as 32 × 32 may be purchased for as low as $290. (includes walls, base, showerhead, shower valve, shower curtain, curtain rod, safety railing).

  • A 41" corner unit steam shower is available for $5,230.

  • A single-piece tub/shower unit costs around $430.

  • A 36" x 60" whirlpool bathtub costs around $1,440.

  • $799 gets you a contemporary freestanding tub that measures 34" x 63" and holds 53 gallons of water.

  • You may even choose for a custom-built shower that is the size of a small room, complete with many shower heads and other opulent ammenities.

  • A walk-in tub costs between $3,000 and $10,000 to build for elders or others with restricted mobility.

A tub may be placed and fastened in place for around $90 in labour expenses before connecting to a water supply and drainage system, whilst a whirlpool tub can be installed and fastened for approximately $145 in labour costs.

Simple tub removal will cost about $30, but tack on the expense of landfill fees and wall and floor repairs.

Cost of Toilet Installation

Each bathroom must have a toilet and sink. A regular toilet installation costs between $122 and $228 on average, with the majority of households paying between $150 and $180.

Add the cost of the toilet, which ranges from $99 to $199 on average, for a total of $221 to $427 for a toilet replacement.

Toilets now use less water than ever before. Certain toilets use as low as 1.2 gallons of water per flush (GPF), in comparison to older toilets that might consume up to 7 GPF.

The difference may equate to considerable water bill savings. Second, there are new state-of-the-art toilets that use remote controls to open/close the lid, switch on ambient lighting, and change the bidet’s water flow.

Cost of Sink Installation

Sink installation costs vary according to the kind of sink but typically range between $230 and $450 to install the sink and connect the faucet to the water lines.

There are various varieties of bathroom sinks, including the following:

Undermount Sink

The sink installs effortlessly under the counter and has a clean, contemporary appearance. Costs between $40 and $2,080.

Pedestal Sink

A free-standing sink that lacks a counter and conceals all plumbing inside the base. Costs between $60 and $300.

While some pedestal sinks are constructed entirely in one piece, others enable you to choose the sink and base separately.

Drop-in Sink

A drop-in sink is one that fits into a hole carved into the counter. It has a clean, sleek appearance and is priced between $35 to $1,950.

Sink in a Vessel

Rests on top of the counter. It resembles a bowl and is hooked to the drain. It costs between $80 to $2,690.

Wall-Mounted Sink

This sink is fixed directly to the wall and does not need a counter or vanity, costing between $42 and $1,560.

Corner Sink

A corner sink is flush with the wall and is ideal for a tiny bathroom or powder room. One costs between $120 to $790.

Cost of Bathroom Vanity Installation

Bathroom vanity installation begins at $45 per hour for labour alone. Additional charges will apply for sink installation and new plumbing. Plumbers charge roughly $122 per hour for this kind of labour.

Vanities are the focal point of the bathroom. They may be as simple as a few shelves or as elaborate as a piece of furniture complete with drawers. They are available in sizes ranging from 24" to 72".

Their principal use is to store bathroom items and to offer a location for the sink. Nowadays, vanities are constructed entirely of cabinets, either to match the cabinets in your kitchen or to replicate the appearance of luxury furniture.


Designed for use in tiny areas and to accommodate a single sink. Between $70 and $2,200.


Holds a single sink and ranges in price from $140 to $2,750.


Prices range from $180 to $3,900


Prices range from $330 to $3,3900.


This dimension allows for the installation of two sinks in the top. Between $410 to $4,170.


Prices range from $1,030 to $4,370.

Installation of Bathroom Flooring

The typical cost of tiling a bathroom floor is $300 to $600 for a 40-square-foot space, $563 to $1,125 for a 75-square-foot bathroom, and $1,200 to $2,400 for a 160-square-foot bathroom.

Cost of Bathroom Tile Installation

Due to its water resistance and affordability, tile is a good option for worktops, walls, and floors. The typical cost of tile flooring installation is between $10 and $15 per square foot.

Installing tile in a shower or bathroom wall typically costs between $7 and $25 per square foot.

The cost of tiling a walk-in shower with 84 square feet of wall space varies from $546 to $2,100, depending on the kind of material used.

When you furnish the tile, tile installation costs between $3.50 and $7 per square foot. Terracotta, stone—marble, granite, and limestone—glass, metal, slate, and porcelain are just a few of the tile options.

Tile Type Small (40 SF) Average (75 SF) Large (160 SF) Huge (210+ SF)
Ceramic $300 $563 $1,200 $1,575
Porcelain $480 $900 $1,920 $2,520
Natural Stone $540 $1,013 $2,160 $2,835

The finest flooring options are waterproof, such as tile. They are simple to clean and resistant to the harsh cleansers that you would use in a bathroom.

Additionally, you want to ensure that the bathroom floor does not become slippery while wet. This may be accomplished via the use of textured tiles and area rugs.

Vinyl flooring

Vinyl flooring is available in an array of colours and patterns and may be purchased at your local home improvement shop. It is available in 12’ wide rolls and 12" square tiles. It typically costs between $3 and $10 per square foot.

Ceramic tile

Ceramic tile also available in an almost infinite variety of colours and textures. Purchase for between $1 and $3 per square foot and have it installed for between $5 and $10 per square foot.

Porcelain Tile

Porcelain tile is a small advance over ceramic tile; it is tougher and less porous than ceramic tile. It’s an attractive option for a bathroom and costs between $3 and $8 per square foot tile.


An excellent choice for bathrooms, but may be slightly more expensive. For bathroom flooring, choose granite, marble, limestone, or slate tile. This option will cost between $5 and $12 per square foot tile.

Radiant floor heating may increase your installation expenses by up to $2,000, or between $10 and $20 per square foot, depending on the size of your bathroom.

Installation of Backsplash in the Bathroom

Installing a tile backsplash in a bathroom costs between $23 and $35 per square foot, depending on the materials you choose.

Your cost is determined by the square footage to be tiled and the kind of tile utilised. A backsplash protects the wall behind the sink from being “splashed back” with water when using the sink. It’s an excellent accent tile for a more pricey tile.

Cost to Build a Bathroom

The average cost of adding a bathroom to your home is roughly $22,000, or $47,000 to $87,000 for high-end materials.

Plumbers and electricians charge between $85 and $120 per hour, while permits for a new house addition range between $200 and $500.

How Much Does It Cost To Plumb A Bathroom?

At an hourly rate of $85–120, plumbing work for a new bathroom may cost between $610–1,180 if just mid-grade components are used—not high-end components, which are more expensive to install.

You’ll need hot and cold water for the sink, shower/tub, and toilet, as well as a water line and sewage pipe.

If you have a basement or crawlspace, this will be less expensive than cutting through a concrete slab.

Electrical Work for the Addition of a Bathroom

Electricians charge between $85 and $120 per hour (labour alone), depending on where you reside. You’re going to need new electrical work for

  • Outlets,

  • Supporters, and

  • Appropriate illumination.

Due to the closeness to water, you’ll need to install GFI (ground fault interrupter) outlets, and you’ll also need to build an external vent if there is no bathroom window.

If you install technology-enhanced showers and toilets, you’ll also need to wiring the bathroom for them.

Permits and Statutory Requirements

You’ll need to contact your local building department to see if any permissions are required.

Minimum bathroom measurements are often specified in building rules; the lowest two-fixture bathroom is 5’ x 4’.

Certain HOAs impose restrictions on house expansions. If you’re working with a general contractor, he or she will know what permissions you’ll need to continue lawfully, but in general, you’ll need permits for the following:

  • Increasing the size of the residence and erecting extra walls

  • Electrical work - all wiring must be code compliant

  • Any additional plumbing and sewage ducts and pipes relocated

Permits guarantee that all work is completed in accordance with your county’s building regulations.

It will be examined upon completion to ensure that everything is in order. Permits cost between $200 and $500, depending on where you reside.

Is it a half bath or a full bath?

A complete bath is equipped with a basin, a toilet, and a shower or bathtub.

Typically, full bathrooms are added to the master bedroom or are located on a separate level next to the main floor.

Converting a half bath to a full bath may add up to 20% to the value of your property.

A half bath is equipped with simply a sink and a toilet. Additional bathrooms are often located in the front of the property to allow visitors to use the facilities without having to go through the house.

Additionally, small bathrooms might be beneficial in the laundry room, mudroom, or garage/workshop.

Consider a three-quarters bath if you’re dealing with a tight area. This is a half bathroom with just a shower.

A half bath should be between three and four feet width and six to eight feet long, or between 18 to 30 square feet in size.

The National Association of Property Builders reports that installing a half-bathroom may increase the value of your home by 10%. Whether to install a full or half bath is determined by a few factors:

Selecting a Bathroom Renovation Contractor

Bathroom additions often have a return on investment (ROI) of 50% to 60%, making it one of the most substantial home renovations you can do to raise your house’s market value.

How To Conserve

Several things you may take to reduce the overall cost of the bathroom you want to add include the following:

  • Reduce its size.

  • Purchase low-cost components. Prioritize the items on your wish list.

  • Perform some of the more accessible tasks yourself—demolition, fixture pickup, and painting.

  • Utilize the existing plumbing system.

The average cost of tiling a bathroom floor is between $300 and $600 for a 40-square-foot area and between $563 and $1,125 for a 75-square-foot size. The average cost of bathroom tile installation is between $7 and $25 per square foot.

Frequently Asked Questions

People usually ask many questions about How Much Does it Cost to Add a Bathroom. A few of them are discussed below:

1. Is it OK to build a bathroom anyplace in my house?

As long as you have a little amount of empty space, proper electrical outlets, ventilation, and sound insulation, you can smuggle a new bathroom into practically any room in your house. While it may seem as if you don’t have any accessible space, the likelihood is that you just don’t know where to search.

2. How far can a room be pushed out?

A bump-out is a little extension to a home that increases the overall square footage but is not as substantial as a complete expansion with numerous rooms. A bump-out may be as tiny as two or three feet protruding from the house’s side or as big as a whole room.

3. Is it worthwhile to install a bathroom?

According to Opendoor statistics, installing a full bathroom increases the median house value by an average of 5.7 percent, or around $17,638. A complete bathroom addition is defined as transforming existing space to incorporate a shower, sink, and toilet.

4. Is a permit required to add a bathroom to my home?

In general, you’ll need a permit if you’re making major and/or structural modifications to your house, such as adding a bathroom, rearranging the floorplan, or installing a window. On the other side, if you’re only changing décor, you won’t require a permission.

5. Is it possible to install another toilet to my house?

A new bathroom may be installed practically anywhere in your house, depending on your plumbing and electrical configuration and the kind of bathroom you choose. It does not take up a lot of space to add a bathroom to your house. A 2.5 square metre area is sufficient for a shower, basin, and toilet.

6. How do I go about constructing a second bathroom?

The simplest approach to add a bathroom is to connect it to the existing plumbing; thus, if the bathroom is located on the other side of an existing bathroom wall where the pipes may meet, your plumbing expenditures for the new bathroom will be decreased.

7. Is planning approval required for the installation of a new bathroom?

As with re-fiting kitchens, planning approval is often not required unless the building is listed. Building Regulations are likely to apply only if you build a new bathroom, for example, in a previously used bedroom or storage space.

8. What additional value does a half bath give to a home?

According to the National Association of House Builders, installing a half-bath boosts the value of an ordinary home by 10%. Adding a complete bathroom increases the value by 20%. This value is accurate if the number of bedrooms and bathrooms are identical prior to adding.

9. What is the difficulty level of plumbing a bathroom?

If you’re constructing a home or renovating and don’t want to waste money, you may be tempted to install the plumbing yourself. Regrettably, this may get rather complicated, and it’s typically better to engage a professional for this one. You’ll need to run new water and drain lines, as well as install new fixtures.

10. How are construction regulations circumvented?

The best method to circumvent the regulations is to build as far back as possible, out of sight, with walk-in access only; parking is available at the gate. The inspectors must have probable cause to enter your property (see anything) or (have a complaint filed). Acquire a copy of the applicable legislation and educate yourself about your rights.

As long as there is some free space in the room, you can sneak a new bathroom into almost any room in your home. A bump-out is a little addition to a property that adds square footage but is not as big as a full expansion with multiple rooms.

Building Regulations will almost certainly apply just if you construct a new bathroom. The National Association of House Builders reports that adding a half-bath increases the value of an average home by 10%.

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