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 the floor plans, site plans, and budget for the entire project.
Click here for the budget: Budget for 537 Square Foot Addition in South San Francisco
This budget is from right before the final invoice. The amount shown is the total cost of all design, engineering, and construction. You can see that the soft costs were approximately $35,000 before the project broke ground. The soft costs are mostly architecture time (billed hourly).
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