What to Consider Before Building an ADU

Source: SweisKloss

What to Consider Before Building an ADU

by SweisKloss
February 18, 2021

California is a popular place to build ADUs (accessory dwelling unit). Perhaps the state legislative changes that occurred in 2020 incentivized homeowners to take the ADU plunge, or maybe the pandemic prompted people to create a separated work-at-home space. Whatever the case, there has been a definite surge in ADUs being built. At SweisKloss, we have received a marked increase of ADU inquiries from people wanting to convert an existing structure or build new. The number of ADU permits issued across CA has gone up from 1,269 in 2016 to 14,702 in 2019, and the number keeps growing. Within a three-year timespan, built ADUs multiplied by 11.5. While our clients simply wanted an extra private space for guests or family members, they do see the added benefits of having an ADU, such as flexibility of living space and increasing the property value. Where to start? First, determine what type of ADU you want. Do you want a JADU (junior ADU), which is no more than 500 sq. ft. and is within the main dwelling of the property, or do you want a detached ADU with more square footage? Are you converting an existing space or building new? While JADUs are more cost effective, detached ADUs offer more space and privacy. Consider how the space will be used long term. We cannot stress enough the importance of hiring a firm experienced in building ADUs and knowing the city’s permitting process. The state has implemented steps to make the approval process easier for a homeowner. For example, cities were allowed to take up to 120 days to approve plans, but this was reduced to no more than 60 days. There are no impact fees for ADUs under 750 sq. ft., and impact fees for ADUs larger than 750 sq. ft. are to be proportional to the size of the ADU in relation to the primary dwelling. With that being said, submit proper plans through your architect and set a realistic timeline and budget. Talk through all the details of your ADU with your design and construction team:

• - Will the design allow for flexible use? Could the layout of the space work in more than one way, as a guesthouse, a work-from-home space, or a rental?
• - What type of design is needed for the hardscape and landscape around the ADU?
• - How will the flow be from the main dwelling to the ADU and from the ADU to other entry/exit points?
• - What will you need as far as exterior lighting, security, and parking needs?
• - What sustainability components could be incorporated? What is required by the state?
• - Is the property in a fire zone? Are fire resistant materials needed?

And of course the design of the ADU must complement the architectural aesthetics of the main dwelling, whether it’s a Mid-Century, Craftsman, Spanish Revival, or another style. An ADU should be a warm and inviting extension of you and your home.