Provide extra space for your family; ADUs and Home Additions in Martinez, CA

Martinez is the county seat of Contra Costa County, California, in the East Bay region of the San Francisco Bay Area. As of 2019, the city’s population was estimated to be at just over 35,000 people. Martinez is known for being the home of John Muir, as well as being the site of the first naval shipyard on the west coast of the United States. Additionally, Martinez is home to a number of historical sites and buildings, including the restored Vine Hill Ranch House and the Contra Costa Canal. The town is also situated along the scenic Carquinez Strait, making it a popular destination for boaters and fishermen alike. With its rich history and abundance of natural beauty, Martinez is truly a unique place to live and visit.

NewKey Construction provides the following services:


Looking to build an ADU on your property? We are a full-service general contractor specializing in the design and construction of accessory dwelling units (ADUs). We have extensive experience with every type of ADU, from detached units to converted garages. We can help you design and build your perfect ADU, whether you’re looking for extra income, more space, or a place for aging parents or adult children. Let us take care of everything – from permits to finishes – so you can enjoy your new ADU worry-free.

Home Additions

Home additions are a great way to add extra living space and value to your home. Whether you need an extra bedroom, bathroom, or office, home additions can provide the perfect solution. Our team of experienced contractors will work with you to design and build the perfect addition for your home. We offer a wide range of services, so you can choose the option that best fits your needs and budget.

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