10 Inspiring ADU Interior Design Ideas for Stylish Small Spaces Accessory Dwelling Units (ADUs) are changing the landscape of housing in cities like Oceanside, CA — offering flexibility, rental income, and creative living solutions. However, designing a compact space for comfort, function, and style can be a unique challenge. In this educational guide, we’ll explore the best ADU interior design ideas to help you craft a beautiful, efficient, and inviting space. Why ADU Interior Design Matters...