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Bathroom Additions in Greater Phoenix, AZ

Add a New Bathroom or Expand the One You Have

Need another bathroom, or more room in the one you’ve got? We add and expand bathrooms across Maricopa County and the West Valley, including closet-to-bath conversions. As a licensed general contractor and master plumber, we handle the framing, permits, and plumbing that a true addition takes.

See Your New Bathroom Before We Build It

Request a free in-home consultation and 3D design.

By clicking “Request My Free Consultation,” you agree that Premier Bath Concepts may contact you by phone, text, or email regarding your project, including through automated technology. Message and data rates may apply. Consent is not a condition of purchase. View our Privacy Policy and Terms.

See Your New Bathroom Before We Build It

Request a free in-home consultation and 3D design.

By clicking “Request My Free Consultation,” you agree that Premier Bath Concepts may contact you by phone, text, or email regarding your project, including through automated technology. Message and data rates may apply. Consent is not a condition of purchase. View our Privacy Policy and Terms.

What Is a Bathroom Addition, and Is It Right for You?

A bathroom addition creates a new bathroom or expands an existing one. Sometimes that means building out new square footage, and sometimes it means reclaiming space you already have, like an oversized closet.

We add bathrooms a few ways: building a new addition onto the home, expanding a cramped bathroom into adjacent space, converting a closet into a three-quarter bath, or adding an ensuite off a bedroom. We’ll help you find the most practical spot in your home.

An addition pays off most when a home is short on bathrooms. Many buyers filter out one-bathroom homes entirely, so a second bath can move a house from hard-to-sell to easy-to-sell, according to Opendoor’s analysis of remodeling data. As a recoup percentage, an addition returns less than a remodel, so it makes the most sense when you genuinely need the space, not just for resale math.

Our Bathroom Addition Process

We design the addition in 3D, then pull the required permits. An addition is new construction, so it needs permits and inspections, and as a licensed contractor, we handle that paperwork for you. Your final price is set in writing up front.

Our in-house crew frames the new space or opens up walls for an expansion, and makes sure the structure is sound before anything else goes in.

Because we hold a master plumber license, we extend the water supply and drain lines to the new bathroom and rough in the plumbing ourselves. We coordinate the electrical and ventilation the new space needs.

We install walls, flooring, vanity, fixtures, and lighting, pass final inspection, and review the finished bathroom with you along with the warranty on your materials and fixtures.

Bathroom Addition & Expansion Options

When there’s no spare space inside, we build a new bathroom onto the home. This is the biggest type of project, involving framing, roofing, and extending your home’s systems, and it’s exactly the kind of work our general contractor license covers.

If your bathroom is cramped, we can expand it into an adjacent closet, hallway, or unused room, giving you space for a double vanity, a bigger shower, or a separate tub. Pair it with a Full Bathroom Remodels.

An oversized closet can often become a three-quarter bath or a private ensuite off your bedroom. If you’re also rethinking storage, see Walk-In Closets.

Why Choose Us

We’re a licensed general contractor (ROC 365652) and master plumber (ROC 367067), bonded and insured. Additions are new construction, which most bathroom remodelers aren’t licensed to do. We pull the permits, handle the framing and plumbing, and see the project through final inspection.

The team that designs your addition is the team that builds it, with about 50 years of combined experience. Selected acrylic, crushed-stone, and fixture products carry a true lifetime warranty we service locally. This is part of our full Bathroom Remodeling services.

Bathroom Addition Cost Factors & Timeline

The biggest drivers are whether we build new square footage or convert existing space, how far the plumbing has to run, the size of the bathroom, and the finishes you choose. We measure, plan the addition, and give you a clear written price up front. Ask about financing for qualified borrowers.

An addition takes longer than a remodel because of the framing, permits, and inspections involved. In the Sun Cities and other HOA communities, an addition may also need HOA approval on top of city permits, and we help you navigate both. After we plan the project, we’ll give you a realistic schedule.

Hear It From Your Neighbors

How long does a bathroom remodel take?

Do I need a permit to add a bathroom?

Yes. A bathroom addition is new construction, so it requires city permits and inspections, and often HOA approval in communities like the Sun Cities. As a licensed general contractor, we pull the permits and manage the inspections for you, so it’s handled correctly.

Often, yes. An oversized closet can become a three-quarter bath or a private ensuite if there’s room for the fixtures and a practical way to run plumbing. We’ll assess the space and tell you honestly whether a closet-to-bath conversion will work in your home.

Longer than a remodel, usually several weeks or more, because of the framing, permits, and inspections. Building new square footage takes more time than converting existing space. After we plan your project, we’ll give you a realistic schedule.

It’s most worth it when your home is short on bathrooms, since many buyers won’t consider a one-bath home. An addition returns less of its cost at resale than a remodel does, so the biggest payoff is the daily use and improved marketability, not dollar-for-dollar payback.

Often, yes. If there’s underused space inside, like a large closet, part of a hallway, or an adjacent room, we can convert it rather than build new square footage. That’s usually faster and less costly than a full exterior addition.

Serving Greater Phoenix, the West Valley & the North Valley

We work with homeowners north of I-10 across the West Valley and North Valley, with deep roots in the Sun Cities. From the 55-plus communities of Sun City and Sun City West to Surprise, Glendale, Scottsdale, and North Phoenix, our crew covers Maricopa County and the communities around it.

Remodeling Tips for Arizona Homeowners

What Actually Drives the Price — a plain look at what moves the number up or down.
Which Is Right for Aging in Place? — how to choose based on comfort, safety, and your bathroom.
Choosing Shower Walls That Last — what sets the three wall systems apart in look and upkeep.

Let’s Talk About Your Remodel

Tell us what’s going on with your bathroom or kitchen, and we’ll walk you through your options and show you a 3D design & give an exact quote.