Housable ADU Project Case Study:

Detached ADU in Downey, CA

Housable ADU Project Case Study:

Detached ADU in Downey, CA



Project Details
In Construction
ADU Type:
Detached New Construction
ADU Size:
1,000 sf
Project Location:
Downey, CA

Goal: The property owner wanted to expand the existing garage, create exterior access for privacy, and design an ADU above the existing garage.

Design Challenge: Setbacks limited footprint expansion options.


Process and Solution: The homeowner wanted to keep their existing garage so they chose to build a new ADU in their rear yard. Space saving design decisions included a tankless hot water heater mounted to the exterior of the building. To maximize the investment they chose to build a 1000 square foot ADU.


The final ADU included two bedrooms and two bathrooms, a separate living area, bar dining room, a full kitchen, and a standing washer-dryer set.

Using this model as the starting point, this project was customized to the owner's preferences and the conditions of the property.

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