About
ClearLine Plumbing is a residential plumbing company based in Windsor, California. We focus on six areas of residential service — water heaters, repipes, sewer line, gas, drain cleaning, and general service and repair — across northern Sonoma County. The work is documented, quoted in writing before we start, and built around customers who want a plumber they can call again.
How we work
Every job starts with an in-home diagnostic. We look at the actual scope, identify the root cause, and write three options at three price points before any work begins. You see all three numbers before we touch a wrench. The number you agree to is the number you pay. No hourly billing, no surprise add-ons.
Before, during, and after photos on every job. A line-item invoice. A written diagnosis. All emailed within two hours of leaving your driveway. You have a complete record. The next plumber — yours or the next homeowner's — has a starting point. Documentation is part of the job, not an extra.
We work in four primary neighborhoods on purpose — Windsor, Healdsburg, Fountaingrove, Bennett Valley — and accept work across the wider Sonoma County area on request. Tight focus means familiarity: we know the housing stock, the soil, and the common failure modes by era of build. Plumbing built for a relationship, not a transaction.
Our standards
Out of scope on purpose
We don't take new construction work. We don't take remodel work. We don't run 24/7 emergency dispatch. We don't quote prices over the phone — accurate pricing requires an in-home diagnostic and a written estimate. We don't install builder-grade substitutes for properly specified materials.
The scope is narrow by design. It's what lets us do the in-scope work consistently — with the documentation, the timelines, and the standards we hold ourselves to. If a job we'd otherwise turn away has a clean fit with what we do, we'll often accept it. If it doesn't, we'll tell you who to call instead.
Founder
ClearLine Plumbing LLC was founded by Robert Henningsen, a California-licensed contractor (CSLB #970655) with over a decade of residential plumbing experience in Sonoma County. The company is built around the work standards Robert spent years refining as a sole operator — photo documentation, three-option written quotes, flat-rate pricing, and the discipline of saying no to work outside scope.
ClearLine continues to grow under those standards.
Call between 8am and 4pm, Monday through Friday. Or send us a note and we'll get back to you the same day.
