Founded in 1989, Darb Mechanical Plumbing & Heating was started by David Sullivan as a small plumbing and heating company built on hard work, honesty, and quality craftsmanship. Originally founded in Malden, Massachusetts, the company has since grown into a father-and-son, family-owned business specializing in high-end residential plumbing and heating systems, custom homes, renovations, hydronic heating, boiler installations, gas fitting, and commercial work throughout Massachusetts, New Hampshire, and Maine — while still maintaining the same hands-on, family-oriented approach the company was built on more than 35 years ago.