Our Clients

We take pride in our customer satisfaction, the quality of service we provide, and our repeat customers.

We are located in Watertown, but have a steady customer base in Waltham, Belmont, Cambridge, Arlington, Newton, and Wellesley as well. What makes our construction company different from the other contractors is that we take the time to get to know you and your needs.

When we work with you, you have our attention exclusively. We handle one project at a time until completion.

We focus on your job, which allows the job to be finished quicker, providing better value and less disruption to your family.


"You delivered what you promised."

"We think you and your crew have done a great job in every detail from the scheduling to the work to the cleanup. You deliver what you promised. You can be sure that we'll recommend you to anyone who asks. If we have any future projects we'll be sure to get in contact." ~Dave and Peggy, Watertown

"Always on time, clean and thorough."

"For over 20 years I have had Albert and Frank do work for me. Always on time, clean and thorough. I would recommend A. Cosco and Son to everyone." ~Ronald J Cerrone, Watertown

"They are always on time, courteous, and extremely reliable."

"The Nalbandian Family has known and worked with the Cosco Family for nearly 25 years. We own several homes in the Watertown/Belmont area. In that time the Cosco's have replaced windows, kitchens, roofs, and bathrooms. The list of smaller projects is almost endless! I have been very happy with all their services. They are always on time, courteous, and extremely reliable. I wold recommend them for any project, small or large." ~Richard Nalbandian, Watertown

References are available upon request - just ask!


A. Cosco and Son is a general contractor specializing in carpentry, additions, and all types of home remodeling jobs.


Watertown, MA 02472

Phone: (617) 924-7848


Service Area

Serving Watertown, Waltham, Belmont, Cambridge, Arlington, Newton, and Wellesley, Massachusetts.