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What are ADUs (Accessory Dwelling Units) and JADU (Junior Accessory Dwelling Units)?


An ADU, or accessory dwelling unit, is a secondary living space on a property that can be used as a separate residence. ADUs are often converted from existing structures such as garages, attics, basements or proposed single dwelling unit, attached or detached garage.


Junior Accessory Dwelling Units (JADUs) are allowed to be created within the walls of a proposed or existing single-family residence and shall contain no more than 500 square feet. JADUs offer additional housing options. They may share central systems, contain a basic kitchen utilizing small plug-in appliances, may share a bathroom with the primary dwelling, all to reduce development costs. JADUs present no additional stress on utility services or infrastructure because they simply repurpose existing space within the residence and do not expand the dwellings planned occupancy.

What are some of the benefits of having an ADU?

1. Increased home value

ADUs can significantly increase the value of your home. A recent study in Portland, Oregon found that ADUs added an average of 20% to the resale value of a home, while detached ADUs added even more—an average of 34%.

2. Additional income opportunities for homeowners

ADUs provide an opportunity to generate rental income, which can help offset the costs of owning a home. In some cases, ADUs can even be used as long-term rental units, providing a source of income for retirees or other homeowners who may not otherwise be able to afford their mortgage payments.

3. Opportunity to age in place

ADUs can provide a place for aging parents or other relatives to live, while still allowing them to maintain their independence. ADUs can also be adapted to accommodate people with disabilities, providing them with a safe and comfortable place to live.

4. More affordable housing options

ADUs can help make housing more affordable by increasing the supply of available units. In addition, because ADUs are often smaller than traditional homes, they tend to be more affordable to build and maintain.

5. Increased flexibility in the housing market

ADUs provide homeowners with increased flexibility in the housing market. For example, ADUs can be used as short-term rental units, making it easier for homeowners to move if they need to. ADUs can also be converted back into traditional living space if the need arises.

Overall, ADUs offer many benefits to both homeowners and the community. They provide an opportunity to increase home value, generate rental income, provide more affordable housing.

ADU design services at SNBM Design Studio

When most people think of an accessory dwelling unit (ADU), they think of a small, cramped living space. However, with the help of SNBM Design Studio, you can create a comfortable and stylish ADU that perfectly suits your needs. Our team will work with you every step of the way to ensure that your design is just right. Let us help you make your dream home a reality!

SNBM is a full service design studio that specializes in ADUs. We are located in Orange County, California.

Call us at 949-396-0810 or visit us at

JADU (+/-200 S.F.)

Cost of design drawings      $2,465

JADU (+/-495 S.F.)

Cost of design drawings      $3,465

ADU (+/-200 S.F.)

Cost of design drawings      $2,465

ADU (+/-495 S.F.)

Cost of design drawings      $3,465

ADU (+/-748 S.F.)

Cost of design drawings      $4,488

ADU (+/-1152 S.F.)

Cost of design drawings       $6,912