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About Us

John Mangiantini has been a licensed General Building Contractor in Sonoma, California for over 20 years. John's vast experience ranges from residential custom design build and remodel projects to commercial projects, which include hospitality, industrial & business buildings, as well as underground construction. John believes that communication and realistic, fair pricing is key to keeping a project within budget; John is known for his steady character and excellent construction management skills which along with his commitment to regular and direct client contact at all times help to ensure that projects are completed within budget and on schedule.

Services Provided

Accessory Dwelling Units (ADUs), Barn Design & Construction, Bathroom Remodeling, Concrete Construction, Custom Home, Deck Building, Energy-Efficient Homes, Foundation Construction, Garage Building, General Contracting, Green Building, Guesthouse Design & Construction, Home Additions, Home Extensions, Home Remodeling, Home Restoration, House Framing, Kitchen Remodeling, Multigenerational Homes, New Home Construction, Outdoor Kitchen Construction, Pool House Design & Construction, Porch Design & Construction, Project Management, Roof Replacement, Shed Design & Construction

Areas Served

Boyes Hot Springs, El Verano, Eldridge, Fetters Hot Springs-Agua Calie, Glen Ellen, Kenwood, Napa, Novato, Penngrove, Petaluma, Sonoma, Temelec, Vineburg, Yountville, Rohnert Park, Santa Rosa


Voted "Best General Contractor", People's Choice Awards, Sonoma Valley 2016, 2017, 2018, 2019 and 2020 Voted "Best of Houzz" for Service 2015, 2016, 2017, 2018 and 2020

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Contact Mangiantini Construction, Inc.
PO Box 900
Sonoma, CA 95476
Typical Job Cost $50,000 - 10 million
License Number 800675