Nevada City and Grass Valley general contractor Frans Velthuijsen, president and owner of Quality & Quantity Construction Services, Inc., CSL: 927549, has more than 25 years of experience in the SF Bay Area and Nevada County.  Years of hands-on repair and remodeling with some renowned San Francisco contractors, has helped him understand the life cycle of buildings and their components, as well as the importance of quality “life cycle balanced” detailing.