Cost of a family room, owner’s bed and owner’s bath addition in a Northern California bungalow

This is part of a series of posts on real project costs.  New Avenue is the leading national design/build network.  Our designer and contractor partners use our online platform to provided their bids and process their invoices.  As such we get a unique collection of project costs.  We share these costs to help inform owners, designers, and contractors. 

Many of our communities across the country are full of small bungalows the are around 100 years old and they measure just over 1,000 square feet. Some were cottages that were slapped together when silicon valley was just farms. Other were world class craftsman bungalows.  Regardless of the original home, many owners are adding on to make room for families, offices, owner’s bedrooms and owner’s baths.

This is the budget and the plan for a 900 square foot simple design.

The full project budget including all design, engineering, permits and construction is here: 900 Square Foot Owner's Bath Bed and Family Room Addition

The full cost at the time of this project was $371,776.00. In 2020, this project would cost around $550,000.00.

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