Check our Plans page for more details, including these two sources:
- Some communities in San Mateo County have an ADU Plans Gallery that shows locally pre-approved plans, plus prefabricated options (which are considered pre-approved at the state or federal level).
- HEART of San Mateo County offers free ADU plans that can be customized for your property. Explore plans online. Depending on where you live, some Planning Departments offer a quicker application process for these plans. To see if you’re eligible for expedited review, check the GLADUR Pre-Review webpage and talk to local staff.
