ADU Specialist

  • Oranssi carpenter using bench saw
  • Front Door of Charlee Ct ADU
  • Front Door of Culmore ADU

What is an ADU?

An Accessory Dwelling Unit (ADU) is a self-contained, secondary housing unit located on the same lot as an existing single-family home. Often called granny flats, in-law suites, or backyard cottages, they are legal, independent living spaces that include a kitchen, bathroom, and living area. ADUs can be detached structures, attached additions, or interior conversions.

Our
Services

  • Decks and Patios icon

    ADU's

    Whether you’re looking to add extra room for a family member or a rental property it’s a great way to add extra value.

  • Outdoor Spaces icon

    Custom Homes

    If you’re tired of looking for the ideal home why not build it to your specific needs.

  • Custom Additions icon

    Room Additions

    Maybe you’re just looking to add an extra room to your home or make a room larger this is a great way.


  • Green Building icon

    Experienced Builders

    We are a team of experienced builders that have been in construction for many years. Whatever it is you’re looking to build we have the team and experience necessary to make it a reality.


GET IN TOUCH

Sample of our finished work

  • Oranssi project: studio shed

    ADU in Redlands

  • Oranssi project: roof expansion

    ADU in Moreno Valley

  • Oranssi project: wraparound deck

    ADU in Claremont

  • Oranssi project: passive house

    ADU in Beaumont

Ready to Build Your Vision?

It all begins with an idea. If you have a vision you want to bring to life but aren’t sure where or how to start your project give us a call to get a gameplan going.

About us

CATO Construction is a family ran construction and consulting company proudly serving Southern California for over 30 years. We are committed to delivering high-quality craftsmanship, competitive pricing, and efficient project timelines tailored to each client’s needs.

Over the years, we have built a trusted team of skilled professionals who share our dedication to quality, reliability, and customer satisfaction. Our goal is to make the building process as smooth and stress-free as possible through clear communication, transparent pricing, defined project goals, and organized timelines.

At CATO Construction, we take pride in turning our clients’ visions into reality with professionalism, integrity, and attention to detail.