The PAS400 is a 400 sq ft studio ADU floor plan designed to deliver maximum efficiency within a compact footprint. This layout brings together living, sleeping, kitchen, and bathroom functions into a clear and practical arrangement that supports everyday use without wasted space.
The plan is built on a simple 20 by 20 configuration, allowing for straightforward construction, predictable costs, and faster permitting. Circulation is direct, the kitchen is positioned for functional workflow, and the bathroom is compact but complete. Every decision is driven by usability and build efficiency rather than unnecessary complexity.
Natural light and ventilation are prioritized through carefully placed openings, helping the space feel larger than its size. The open layout allows flexibility for furniture arrangement and future adaptation, whether the unit is used for rental income, extended family, or a private workspace.
The PAS400 is developed as part of a systemized ADU approach, meaning it is not a one off design. It is optimized for Southern California conditions, aligned with common construction practices, and structured to reduce design time while maintaining architectural clarity.
This is not about making a small unit look good on paper. It is about creating a compact ADU that performs in real use, builds efficiently, and moves through permitting with minimal friction.
