Housable ADU Project Case Study:

Garage Conversion in Bell Canyon, CA

Housable ADU Project Case Study:

Garage Conversion in Bell Canyon, CA



Project Scope


Project Details
Completed Project
ADU Type:
Garage Conversion
ADU Size:
574 sqft, 1 bed, 1 bath
Project Location:
Bell Canyon, CA
Project Timeline:
10 months


Goal: The property owner wanted to convert the existing garage into a media room that could also be used as an ADU, and build a new garage attached to the existing media room.

Design Challenge: The property was located within a fire hazard area as well as a Homeowner's Association so required additional design standards. The design had a wide ceiling span and the owner did not want trusses or excessively long ceiling joists.

Process and Solution: The customer chose to convert the existing attached garage to a simple studio with a bathroom and efficiency-kitchen. ADU access was through a separate rear door and a shared hallway attached to the primary home which also accessed the new, three-car garage.

The homeowner was a contractor and built the project themselves. They also provided significant design input regarding the new roof structure of the new garage. To increase the space within the garage the homeowner-builder decided to install the ceiling joists at 1/3 the roof height which reduced the needed roof joist length and eliminated the need for trusses which are costly and difficult to procure.

The final ADU included a living area, a small kitchen, and a bathroom with a full bathtub. To save space, a microwave was installed in lieu of a larger range.


Unique Project Traits: The homeowner was the builder for this project and designed a unique roof-joist solution to reduce the cost of construction.

Project Layout:

See an early ADU Design for the project below. Customers may provide mark ups to request changes and confirm information about their project throughout the process.

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