Midmass Construction Group Inc Claim Listing Return to Directory Rating (average) (0) Business Genre Contractor, Nonresidential Business Website Address midmass.com Business Address, City 421 Washington St, Auburn ZIP Code 01501 Business Phone Number 5088325100 Business Fax 5087539377 Ratings There are no reviews yet. Please login to leave a review. Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?