Cost of an Addition in South San Francisco that Includes an Accessory Dwelling

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Written By Sarah Foster

Here's what it cost to build "Grandma's House" as an accessory dwelling in San Francisco.

We recently completed a two-bedroom, one-bath dwelling with kitchen and living room in a 537-square-foot addition. This is for a 1,572-square-foot home in South San Francisco. Affectionately called "Grandma's House," this accessory dwelling is for the mother of the owners.

Below you can see some of the plans.

Floor-Plan.png

The total cost of all design, permitting, engineering, and construction was $337,972.87 at the time of completion in 2017.

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Sarah Foster
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