ADU Specialists

Thinking about building an ADU or guest house on your property?


Adding an Accessory Dwelling Unit, or also known as a Granny Flat, is the perfect way to have a dignified living space for your senior family member to be close to home, but also have their own living quarters to call their own.

Turn an empty space in to the perfect guest suit for friends and loved ones.

If you’re a Central Coast homeowner looking for a way to add a room to your home, whether it be for a family member, a vacation rental, or just a guest space for when friends come to visit, you’ve come to the right place. Our team at Frantz Construction can help you design and build the perfect Accessory Dwelling Unit (ADU) for your home. 

ADU’s, also called in-law units, granny flats, and backyard cottages, are independent living spaces that are autonomous from your main home or living area. They are very simple in design and footprint, typically ranging from 750 – 1200 square feet and they are often outfitted with ADA accessibility features for safe and self sufficient living. 

Frantz Construction is your Central Coast ADU specialist ready to turn an empty space into the ideal guest suit. From concept to completion, we will manage and execute every aspect of the process to create the perfect ADU for your family.

large bedroom with floor to ceiling windows frantz home additions

They put a lot of pride and care into the work they did. I’m very happy with the finished product.

build with confidence
build with frantz

With over 30 years of experience, the crew at Frantz Construction is who you want as your custom home or remodeling partner. Let us create your dream home.

Committed to Quality

We know that your projects can be both exciting and stressful — we are committed to giving you our very best every day to make your experience as pleasurable and low stress as possible. We value creating a working partnership with open and honest communication throughout the whole process.

Design-Build Capabilities

You tell us what you need and we will bring the team to you. We collaborate with the best architects to plan, design and build exactly what you’re looking for. Above all, we guarantee the vision you start with will equal the home you end up with down to the smallest details.

Knowledge & Expertise

Josh Frantz grew up working construction with his father from the age of seven years old building decks, gazebos and fences all on his own by the age of 12. As a result, a jack of all trades with experience in every aspect of the construction process, Josh leads Frantz Construction with high standards and expert knowledge.

Refined Process

We have systems and processes in place that consistently deliver for all our clients. Therefore, no matter the size or scale of your project, our experienced team provides the results you desire, on time and on budget.