Costa Mesa is a cosmopolitan ADU construction in Mission Viejo known for its trendy boutiques, art scene, and top-notch shopping destinations. It’s also home to the South Coast Plaza, one of the nation’s premier shopping centers, as well as the Costa Mesa Playhouse that showcases local talent in captivating theatrical productions.

Like many cities in California, Costa Mesa is promoting the building of ADUs or accessory dwelling units. Located on the same property as a primary residence, these small homes add extra living space and can generate income through short-term rentals.

Top Costa Mesa ADU Companies for 2025

Depending on the design, these ADUs can be an effective solution for addressing housing shortages in the city and helping homeowners tap into the thriving rental market. However, it’s crucial to work with a Costa Mesa ADU company to ensure that the design and construction of your ADU follows all applicable zoning regulations and requirements.

To make the construction process easier, Costa Mesa has launched two exciting ADU programs:

ADU Pre-Approval Program:

With this new program, homeowners can get their ADU plans approved before submitting for permits. This can help speed up the construction process and reduce architect fees.