Local Plumbers in Santa Rosa, California. You never know when plumbing woes will strike. That’s why Holman Plumbing is your local 24-hour plumber in Santa Rosa. Holman Plumbing is a locally owned and operated emergency and standard plumbing company serving all of Sonoma county. Justin Holman, the owner, has been in the trades for over a decade. He has been exclusively service plumbing Sonoma county for over 6 years. We are the go to solution for all your plumbing needs. We specialize in water heating and fixture repair/replacement. However, we have the tools and expertise to handle almost any repair or installation you may need.