Plumbing companies in Illinois typically sell for 2.5x to 4.5x SDE. Businesses with commercial service contracts, trained licensed crews, and strong residential repeat customer bases command the higher end of the range. Residential-only plumbers with high owner involvement often sell closer to 2x–3x.
Key Valuation Factors
License transferability is critical — buyers need to understand whether the business can legally operate under new ownership, particularly if the owner holds the master plumber's license. Businesses where a key employee holds the required license, or where the buyer is themselves a licensed plumber, resolve this issue cleanly.
Fleet and Equipment
Buyers value well-maintained fleets with vehicles that have useful remaining life. A six-truck operation with newer vehicles is worth more than a similar revenue business with aging, high-mileage trucks. Documented preventive maintenance records help support equipment value during due diligence.
Plumbing businesses with service agreement programs — annual inspections, water heater maintenance plans — typically sell at a premium because recurring revenue reduces buyer risk and improves SBA loan approval odds.