Add a bathroom
Adding a bathroom to a house
A new bathroom can go inside the walls you have, in a closet or a corner of a room, or in an addition.
How far it sits from the pipes you already have decides most of what it costs.
Or call or text (817) 631-9803
What it costs with us
Cost to add a bathroom
Where a new bathroom goes decides most of its cost. We publish two figures, and here’s what each one covers.
Rebuilding a hall, guest, kids’ or powder bath, down to the studs
$20,000 – $55,000
That range is for a bathroom that’s already there. A new one inside your walls takes the same trades, and its drains and water lines have to reach a room that never had them.
The plumbing for a bathroom in an addition
$15,000 – $35,000
That’s the plumbing on its own. A single-story room addition runs $80,000 to $210,000 with us.
Every figure here is construction plus our fee, before permits and contingency.
Remodeling the bathroom you have? Here’s what a bathroom remodel costs in Fort Worth. Building on? Here’s what a home addition costs in Fort Worth.
Closet, corner, stairs or addition
Where you can add a bathroom
Look for a bathroom’s spot the way a plumber would: by how far it sits from the pipes you already have. That distance decides more of the cost than the size of the room.
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A closet beside a bathroom
A closet that shares a wall with a bathroom you have keeps the new drains close to the old ones. Taking out its walls needs a building permit.
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A corner of a bedroom
Borrowing part of a large bedroom gives that room a bath of its own. When it’s the main bedroom, that’s a primary suite, and it’s a project of its own.
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Under the stairs, or a hall closet
A small space can take a half bath: a toilet and a sink. With no tub or shower, there’s no shower pan and no glass, the two most expensive trades in a bathroom.
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In an addition
When no room inside can spare the space, the bathroom goes in new square footage: a room added on, or a bump-out with a bathroom in it.
Four things decide it
What makes adding a bathroom cost more
Once you know where it goes, four things decide where in a range you land.
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How far the water has to move.
Moving a drain is a floor-structure job, not a plumbing job. The closer the new bathroom sits to the old one, the less floor comes up.
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Whether it’s a full bath or a half bath.
A shower brings a shower pan, waterproofing and glass. A toilet and a sink don’t.
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Whether walls move.
A bathroom made from a closet and a stretch of hall means walls come out, and how many of those pieces have to move decides the number.
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What you finish it with.
Finish level, which is the lever you control most. Stock vanity and porcelain against custom millwork, stone and frameless glass is most of the spread once the plan is settled.
What the City asks for
Permits for adding a bathroom in Fort Worth
A new bathroom takes permits in Fort Worth. The new pipes and drains take a plumbing permit, and the rest depends on what else the job touches.
- Plumbing permit
- Changing, installing, moving or repairing pipes, water heaters and shower pans.
- Electrical permit
- Changing, moving or repairing wiring and electrical equipment, the electrical service included.
- Mechanical permit
- Heating and air equipment, ductwork and exhaust fans.
- Building permit
- Demolishing interior walls needs a permit. Every addition needs a building permit.
On our remodels, the permits are ours to handle. On our additions, our team walks the permit through the City.
On an addition, permit fees run $1,200 to $3,500.
City of Fort Worth, Residential Permitting. Read November 5, 2026.
How to get a price for adding a bathroom
After the first walk-through you get an estimate. Once the design is done, you get a detailed budget.
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Meet Up.
A designer and a builder come to your house, look at it with you at no charge, and give you an honest estimate.
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Team Up.
Our drafting team draws the house as it stands and where the new bathroom goes, and your detailed budget comes from those drawings.
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Glasses Up.
We build it, you watch the budget as it moves, and you get back a home that feels like you.
Or see how we remodel bathrooms
Best Home Builder & Remodeler
Fort Worth MagazineFort Worth Chamber Small Business of the Year4.7 stars from 91 Google reviews as of September 2026
How much does it cost to add a bathroom?
Where it goes decides most of it. With us in Fort Worth, rebuilding a hall, guest, kids’ or powder bath down to the studs runs $20,000 to $55,000. A new one inside your walls takes the same trades, and its drains and water lines have to reach a room that never had them. In an addition, the plumbing for the bathroom is $15,000 to $35,000 on its own. Every figure is construction plus our fee, before permits and contingency.
Can I add a bathroom anywhere in my house?
Where it sits matters more than whether it fits. A spot that shares a wall with a bathroom you have is the simple case. Moving a drain is a floor-structure job, not a plumbing job.
Can you turn a closet into a bathroom?
Yes, when the closet has room for what goes in it. In Fort Worth, taking out its walls needs a building permit and the new pipes need a plumbing permit. A closet that shares a wall with a bathroom you have keeps the drains close.
Is it cheaper to add a half bath?
Yes, usually. A toilet and a sink skip the shower pan and the glass. Where it sits from your pipes still decides the rest.
Do I need a permit to add a bathroom in Fort Worth?
Yes. New pipes and drains take a plumbing permit, new wiring an electrical permit, and an exhaust fan a mechanical permit. Taking out a wall takes a building permit, and so does any addition.
Should the new bathroom go inside the house or in an addition?
Inside, when a closet, a corner or the space under the stairs can give it up: the roof and walls are already there. An addition is the answer when no room can spare the space. Its bathroom plumbing is $15,000 to $35,000 with us.
Add the bathroom your house is missing
When a house is a bathroom short, you feel it every morning. Walk the house with us, and you’ll know where a new one fits and what it takes to get the water there.
Or call or text (817) 631-9803
