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This project is a ~750 sq ft attached ADU in Pleasanton. The scope includes both new construction and existing home modification. The work begins by separating the construction area from the main house with a dust barrier, removing portions of the existing structure, preparing the site, building the new foundation and crawl space, constructing the ADU framing, and then completing the full interior buildout. The finished ADU includes a full kitchen, full bathroom with shower,

The project converts an existing 560 sq ft garage into a residential dwelling featuring two bedrooms, one bathroom, a kitchen, and a hallway with a dedicated exterior door leading to the backyard. Utility connections tie into the existing home's water and sewer systems while a mini split HVAC system provides heating and cooling. The existing water heater is also relocated and upgraded to a tankless system. One of the more interesting aspects of this project is the layout. Ra

This project involves converting approximately 1,400 sq ft of garage space into a residential ADU-style living environment in Livermore. The planned scope includes three bedrooms with closets, three bathrooms, a kitchen, a laundry room, interior doors, patio door installation, heat pump HVAC, electrical work, plumbing work, insulation, drywall, fire-rated construction, flooring installation, painting, and final inspection. The project also includes new electrical infrastruct

Unlike a room addition that connects to an existing structure, this project involves constructing an entirely new dwelling from the ground up. The ADU includes a full kitchen, bathroom, bedroom with closet, laundry area, mini split HVAC system, tankless water heater, plumbing systems, electrical systems, foundation, framing, roofing, insulation, drywall, and exterior finishes. In addition to the ADU itself, the project also requires a new electrical subpanel installation a

This project involves building a ~1,200 sq ft, two-story ADU in San Jose. The structure is planned to contain two separate residential units, with each unit featuring two bedrooms, one bathroom, and a laundry room. The project also includes full kitchen construction for each unit, separate plumbing systems, separate electrical systems, separate HVAC heat pump systems, tankless water heaters, one-hour fire-rated assemblies, smoke and carbon monoxide alarms, and a new electrica

In addition to building approximately 157 square feet of new living space, the project also includes remodeling the existing kitchen and creating a new bedroom. As a result, portions of the existing structure must be modified and integrated with the new construction to create a seamless floor plan. This means the project involves both expansion and renovation at the same time. Much of the work therefore occurs inside the existing home rather than solely within the addition

For this particular garage conversion project in Lathrop, the plan was to convert an approximately 400 sq ft attached garage into a fully livable residential space with a kitchen, laundry room, closet, upgraded utilities, and improved integration with the existing home layout. What many homeowners initially underestimate is that garage conversions are rarely just “interior remodels.” Most garages were never originally designed for long-term residential occupancy.

For this particular garage conversion project in Lathrop, the plan was to convert an approximately 400 sq ft attached garage into a fully livable residential space with a kitchen, laundry room, closet, upgraded utilities, and improved integration with the existing home layout. What many homeowners initially underestimate is that garage conversions are rarely just “interior remodels.” Most garages were never originally designed for long-term residential occupancy.

To give you a clearer picture, here’s a sample attached ADU with home addition project in Newark, California. This is a strong example of what homeowners should plan for when building both an ADU and home expansion together. This project combines a ~500 sq ft attached ADU with a 175 sq ft home addition. It also includes major infrastructure items like a 400 AMP electrical upgrade and sewer line connection. This will help you understand how the process, cost, and timeline come

Garage conversion JADU projects in Palo Alto and surrounding Bay Area cities typically cost between $90K–$150K depending on the condition of the existing garage, utility upgrades, finish selections, and local permit requirements. For this Palo Alto project, the goal is to transform an existing garage into a fully functional ~280 sq ft JADU with a modern kitchenette, upgraded utilities, improved insulation, and a comfortable living layout.