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White Bedroom



 your backyard

The Additional Space you need is waiting right outside your door

The first thing you need to do is find out what you can build in your neighborhood. San Diego County has different regulations in different areas. Once you know what is allowed in your area, then look into the cost of building an ADU in San Diego County. We can help you, just ask your questions and we will answer.


Expert Guidance

Relax while our team guides you through the creation of your project. From the 3D ADU designs, obtaining permits, construction and project management, to occupancy.


The Affordable Alternative

Most of the time, the cost to build an ADU on an  existing property is much more affordable than buying a single family home anywhere in San Diego. Explore your options with us. Look at Granny Flat Floor Plans.


Experience & Craftsmanship

Our team has nearly 50 years of experience building homes and ADUs in San Diego. Over the years, our process has developed into a system to deliver high-quality homes in an affordable and efficient manner.

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The versatile

Accessory Dwelling Unit

These backyard homes serve many functions. We have built ADUs that are used as backyard rentals, granny flats, and backyard offices. We build garage conversions that serve as over the garage apartments and we can even convert your garage to a room or a gym. We build to suit your needs. It's fun to explore the possibilities with our team - call us today!

San Diego County does not allow Homeowners to build every type of ADU in every neighborhood in San Diego. Many of our clients have come to us after they learned that their adu floor plans could not be built. Ritz ADU Design Build has a systematic ADU planning process that includes fully researching the permitting rules in your neighborhood before we even begin the design phase. Ritz ADU Design Build has extensive experience in walking our designs through the approval process. 

The Ritz

ADU Planning Process


Meet the Team

& Explore Options

Meet with our design team to share your specific needs and any concerns you may have. We will listen to your ideas and offer  suggestions to enhance your backyard home and streamline the process ahead. We will help you find out what San Diego County will allow you to build in your neighborhood.

Land Surveying


3D Designs

& Modifications

After we meet with you, we’ll provide you with a design and a full estimate. Our designer renders designs in full-color digital 3D models that give you the opportunity to “walk through” your designs to get the flow of the home and to see if the floorplans work to your liking before you sign a contract or begin to build.


Site Evaluation

& Measurements

We will make an appointment to come to your home to assess the space you want to use. We will take measurements of the space and structures that may be involved and submit the information to our 3D ADU Design team for renderings. We will take all of that information and put together an estimate of what it will cost to build your ADU.

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Couple Drinking Coffee


Time to Relax

while we build your ADU

We partner with the finest tradesmen in San Diego who perform their job with meticulous craftsmanship. Our jobs run smoothly because we are able to schedule premier craftsmen to work on your home. We’ve all worked together for years and that will be obvious when you see the job site and see how efficient the process runs.


Get Started

with our 3D Design Service

Our 3D Design Service begins with your idea and expands from there. We provide sample ADU floorplans to help your idea take shape. Each of our samples can be modified to fit your space, your city's regulations and your personal taste. Building an ADU can be an enjoyable process when you pair up with the right team. We help our clients to tap into their vision and navigate the designing and permitting process so you don't lose time or money on plans that cannot be built! Contact us today to get to meet with our team for a no-pressure, information gathering consultation.

 Meet the Ritz ADU team today

Improve your Quality of Life, Living Space, and Property Value!

Stylist Modern Study

"I am a hard grader and I realize I have high expectations as it concerns quality work and customer service. Ritz Design Build knocked it out of the park. Experienced and talented staff. Very responsive. Quality material. Attention to detail. Focus on customer satisfaction. Did I mention that this project was started and completed in 2020 during COVD? Ritz got it done in the time frame that was promised. Incredible work Ritz Design Build! Any future projects will be worked by Ritz Design Build. Fact."

~ Patrick Taylor

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