The benefits to these pre-approved plans from the available cities are that you avoid the use of any other third parties such as an engineer, an architect, or a mechanical-electrical-plumbing (MEP) consultant, that would be needed to get a custom set of plans approved. This is beneficial because it reduces the cost of the project, it reduces complexity but most importantly it reduces the amount of time that needs to be invested in the design phase of your project. You avoid needing to pay for plans without any risk of them being approved making it a lot faster to get the necessary permits issued. Check out the pre-approved plans and the available cities by clicking the "Pre-approved Tab" to see which one will be your future ADU.