A Junior Accessory Dwelling Unit (JADU) is one of the most cost-effective and space-efficient ways to add livable square footage to your property. Ataman Studio specializes in custom Junior ADU design and permitting across California, helping homeowners unlock new possibilities for multigenerational living, rental income, or expanded personal space—all within the footprint of an existing home.
A Junior ADU is a compact, self-contained living unit created within the walls of an existing single-family home. Unlike a detached ADU, a JADU must be located within the main residence, typically converted from a bedroom, attached garage, or portion of the home. It includes its own separate entrance, living space, and a basic kitchen, and may share a bathroom with the main house.
Key Features of Junior ADUs:
Whether you’re in Los Angeles, Sunnyvale, San Jose, Santa Clara, San Diego, or Cupertino, California law has made it easier than ever to build a Junior ADU. With minimal impact on your property and a faster approval process than full-size ADUs, JADUs are ideal for:
Ataman Studio helps you navigate every aspect of Junior ADU design and permitting to make the process simple and successful.
We evaluate your existing home layout and local regulations to determine the best way to integrate a Junior ADU.
Our team creates functional, stylish floor plans that make the most of your available space.
We handle all construction drawings and coordinate submittals with your city for faster approvals.
From Cupertino to Los Angeles, we ensure every JADU meets California’s evolving housing laws and local zoning requirements.
Need help building your JADU? We can connect you with trusted local contractors for construction.
We monitor the building process to ensure your JADU is constructed according to the approved design plans and quality standards.
Every city may add specific requirements—Ataman Studio helps you stay compliant and on track.
An ADU can be detached or attached and may be larger than 500 sq. ft., while a Junior ADU must be created within the existing home and is limited to 500 sq. ft.
No. By definition, a JADU must be located within the main residence.
Costs vary based on design and local conditions but are typically lower than a full ADU—often between $40,000 and $80,000.
Yes. JADUs can legally be rented, providing valuable income opportunities.
No. It may share a bathroom with the main residence, unlike standard ADUs which require their own facilities.
