Cost to convert a garage into a studio ADU in Berkeley, CA

When a family decides to add an accessory dwelling unit, they often consider converting an existing storage building or garage on their property into a rentable ADU. This can work well if the existing building is in good shape and structurally sound. In this post we will break down the cost of a project we completed that involved converting a detached 11′ x 22′ garage into a studio apartment for our client’s mother.

Based on the existing structure and their needs, a New Avenue designer created a plan that the client absolutely loved.

The garage’s foundation, exterior walls, and roof were all used in creating this new accessory home. A ductless mini split heat pump conserves space and energy while keeping the home comfortable by providing both heating and air conditioning.

With a kitchenette on one end and a full bathroom on the other, this compact accessory dwelling unit includes everything an active grandparent needs. A living/sleeping area fills most of the space, making use of a pull-down murphy bed. Large windows bring in ample natural light and views out to the garden, making the home feel spacious. Neutral tones and complementary finishes give it a clean, modern look.

“Living in my new little home is a dream come true. I love it so much, and thank you again and again for the beautiful job you have done and the kindness and generosity you have shown us. Everyone who has seen it is amazed, including the appraiser who was here yesterday. I have also shown the home to one couple who I hope has contacted you to work with them and have also given your name to two other parties interested in contacting you.”

- Iral

Adjusted to today’s construction costs, the budget for this project came to $182,273.48.