STANDARD ADU PLANS – PRE APPROVED ADU Comp. The Los Angeles Department of Building and Safety (LADBS) implemented the Standard Plan Program to provide LADBS customers a simplified permitting process for the design and construction of ADUs that are built repeatedly.. 1. 2. Sq.ft -. 0. 400. 800. 1200. ADU Permit Plans in California All ADU plans shown can be customized to fit your needs. All the.