Prototype Plans

RRM Design Group, an architectural consulting firm, prepared the City's ADU prototype plans. There are eight different plans, including five ADUs designed to be detached ADUs and three plans for converting a garage to an ADU. The prototype plans include studios, one-bedroom, and two-bedroom ADUs that range in size from 224 to 909 square feet. The ADUs are available in three different architectural styles: Spanish, Traditional, and Modern; however, the exterior colors, materials, and architectural style of attached ADUs will be required to match the primary residence.

ADU

With the prototype plans, the City will provide, free of charge, floor plans, elevations, electrical and plumbing plans, structural calculations, and preliminary energy calculations that have been reviewed for compliance with all required building codes to homeowners that are interested in building an ADU. The homeowner is responsible for completing the submittal requirements as outlined in the ADU Prototype Plans Checklist, including preparing a site plan and geotechnical report. The ADU prototype plans are designed with some ability for customization, such as selecting a window or door in a particular location. The prototype plans will save homeowners approximately $15,000 in architectural/design services, structural engineering services, and energy document preparation, as well as time.

To view the ADU prototype floor plans, elevations, and renderings, click on the links in the table below:

If you wish to apply for a building permit using one of the prototype plans, contact the Planning Division at planningpermits@dublin.ca.gov and provide the property address and the ADU prototype plan number.  Staff will then email you the prototype plans for your use. 

In addition to the City’s prototype plans, homeowners can work with a design professional to design their own ADU, based on their needs. Many designers/builders offer standardized construction plans that can lower the costs of an ADU.