E. M. Duggan, Inc. has been serving the building industry in New England since 1891. Our staff has created our excellent reputation in the mechanical contracting industry. Through their diligence, E. M. Duggan has grown and prospered and become a well-known firm in Massachusetts. E. M. Duggan has always had an unsurpassed reputation for quality and excellence in customer service. The company is well known for delivering work on time and within budget. We control costs with our extensive planning and pre-fabrication operations. In addition to plan and spec work, E. M. Duggan has significant experience with design-build applications. Duggan Mechanical Service, a subsidiary of E.M. Duggan, provides 24-hour mechanical service and maintenance to similar industries and markets as those served by E. M. Duggan.