How You Can Add a New Half Bath to Your LA Home

Adding a half bath is a relatively easy and quick remodeling project that you can do to make your home more functional and valuable to potential future buyers. If you’re considering it for your own space, there are a few things you should know about that will help you have a successful project. 

In this article, we’ll explore the costs and tips for adding a half bathroom to your home, including the challenges you might face and how to navigate them successfully. Whether you’re a seasoned DIYer or plan to hire a professional, this guide will help you create a beautiful, functional half-bathroom that adds value to your home.

Here at GreatBuildz, a free service that connects homeowners in Orange County, Ventura, LA, and San Diego with reliable general contractors, we speak to homeowners every day about adding a half bath to their home – here are some cost & tips to get you started.

Related: Calculate the cost of your bathroom renovation using our online cost calculator.

half bathroom addition toilet sink plants checkered tile

Why add a half bath to your home

Adding a half bathroom to a house is a practical and convenient solution with a number of benefits. Some of the reasons why you might consider adding a half bath include:

  • Convenience – Especially if you have frequent guests or a large family, half baths are a great place for people to freshen up without having to use the main bathroom, which may be occupied or inconveniently located.
  • Increased home value – Adding a half bath can make your home more attractive to potential buyers if you decide to sell someday in the future
  • Functionality  A half bath is highly functional, reducing congestion in the main bathroom and allowing multiple people to get ready at the same time

brightly lit half bathroom

Choosing a location for a half bathroom

The location of the half bathroom is important to consider. Here are some factors to keep in mind.

  • Space – To install a half bath, you’ll need enough space for a sink, toilet, and at least a small vanity without feeling cramped
  • Accessibility – It’s a great idea to choose a location convenient to guests, such as one that is easily accessible from the living room or kitchen
  • Plumbing – It will be much easier and less costly to place a half bath near existing plumbing systems
  • Ventilation – To prevent moisture buildup and mold, look for a location near a window. Otherwise, you’ll need to install a ventilation fan
  • Privacy – It may be preferable to locate your half bath in a secluded area rather than near high-traffic areas like stairs and hallways

bathroom contractor addition los angeles

Budgeting for a half bathroom

The cost of adding a half bathroom will vary depending on factors such as materials, labor, and plumbing. Some expenses to keep in mind include plumbing, fixtures, flooring, walls, lighting, ventilation, labor, and materials. A general estimate for a half bathroom can range between a few thousand dollars to tens of thousands of dollars. 

If, for example, you’re working with a space with existing plumbing and you plan to do much of the labor yourself, you can expect to pay around $2,000. But if you need to install new plumbing, want to hire professionals to help you, and expect to opt for higher-quality fixtures and flooring, you may need to plan for closer to $15,000.

It’s important to set a realistic budget and carefully research your options to make sure you get the most for your money.

How You Can Add a New Half Bath to Your LA Home 1

Challenges, considerations, and tips for success

There are several challenges and tips that you should keep in mind to navigate the process of adding a half bath and have a successful project. These include: 

  • Style and design – When adding a half bath, you want to make sure you’re matching the current aesthetic of your home for a cohesive addition. Consider the style of your existing bathrooms and choose lighting, fixtures, and flooring that complement them.
  • Permits and plans – Before you begin construction, you’ll need to obtain the necessary permits and have plans drawn up for the project. Check with your local building department to find out what permits you need and what the requirements are for plan submissions.
  • Contractor selection – If you’re not up for taking care of the plumbing, electrical, and construction yourself, you’ll need to hire a reputable contractor to help you out. Note that even if you are a competent DIYer, plumbing and electrical work can be dangerous and complicated, and must be done up to code to avoid future problems. For this reason, it’s generally advisable to work with a professional.
  • Space and layout – When it comes to adding a half bath, you have to work with what you’ve got. The amount of space available and the layout will determine what fixtures you use in order to not have a crowded, cramped bathroom.
  • Timeline – Adding a half bath won’t take as long as more involved home renovation projects, but you should still expect several days or weeks of inconvenience. Work with your contractors to come up with a realistic timeline and be prepared for unexpected delays. 

half bathroom clean aesthetic

Overall, adding a half bathroom can be a challenging project to take on alone. But with the proper planning and help, you should be able to expect a successful project with a great outcome, making your home more convenient, functional, and appealing to potential buyers. Just remember to follow the proper procedures, get the necessary permits, and communicate clearly with your remodeling contractors

Not sure where to start looking for a contractor to help you with your half-bathroom addition? Let GreatBuildz help you out. We’re dedicated to matching homeowners with trustworthy, reliable professionals who have passed our rigorous screening process. Just share what you’re looking for, and we’ll do the rest for you.


Call us at (818.317.3567) or visit our website to be matched with a great half bath contractor in the Southern California, Los Angeles, Orange County, and Ventura County areas.

Hi, we're Paul and Jon - Co-Founders of GreatBuildz. We believe everyone deserves to find a great contractor, have a stress-free renovation, and enjoy their beautiful new space. There are so many contractors out there and it's often hard to tell the good from the bad... until it's too late. We started our company to help simplify your contractor search and help you have a stress-free renovation experience. We're always available to help, no matter where you are in the process. Click here to learn more about our story.

How can we help with your project?

Explore More Remodeling Topics

Remodeling Cost Guides

Cost Guides

design ideas

Design Ideas

Finding a Contractor

Finding a Contractor

Picking Materials

Selecting Materials

remodeling advice

Remodeling Advice

room addition project articles

Home Additions

kitchen Remodeling Guidance

Kitchen Remodeling


bathroom remodeling advice

Bathroom Renovations

adu and garage conversion blog topics

ADU Construction

backyard Remodeling Projects

Backyard/ Exterior

general home remodeling resources

Home Remodeling