Yes, you need a permit to build an Accessory Dwelling Unit (ADU) in California. The permit is issued by the local jurisdiction and can vary depending on your location. To obtain the permit, you must submit plans of your proposed ADU to the local building department for review and approval before construction can begin. APE Structural Engineering will provide all the needed engineering drawings and calculations to help you with the permitting process.

Building an accessory dwelling unit (ADU) in California can be a complicated process to navigate and many building codes have to be met in order to obtain the necessary permits. While some DIYers might tackle smaller projects such as outdoor structures like patios and sheds, it is recommended that more consideration should factor into any bigger construction projects. In those cases, it is strongly advised to seek counsel from your local municipality first, as well as hire a general contractor who will enlist the help of any other specialists required for the process such as a structural engineer. So if you are considering adding an ADU to your property in California, it's best to keep permitting requirements top of mind and plan ahead by consulting with experts from the very beginning.

Two-story accessory dwelling units (ADUs) are an increasingly popular housing option for many reasons. They allow homeowners to add additional living space without taking up too much of their yard, and if you have the unit on the second floor, you could potentially keep a full usable garage on the first floor below. However, there are some restrictions on the size and design of two-story ADUs that may limit where and when they can be built. Before investing in a two-story ADU, it is important to understand the local regulations concerning these structures so that you know what sort of investment you're making into your property.

Yes, you can build a basement for an ADU. However, you will need to check with your local building codes and ordinances for any necessary permits or regulations. Additionally, it is important to consider the type of soil beneath the site as well as potential water table levels before starting construction on a basement for an ADU.