Mainstream Construction Group, Inc. 825 Sunshine Lane Altamonte Springs, FL 32714 PH: (407) 862-6445 FAX: (407) 862-6693 To access plans and specifications you must have a secure login. Please contact Mainstream Construction Group,Inc. at (407) 862-6445 for further instructions. Mainstream Private Plan Room Private Plan Room Login Username Password Enter Bid or Project Key Key   Home  |  About Us  |  Presidents Message  |  Services  |  Portfolio  |  News |  Employment  |  Contact Us  |  Plan Room Copyright ©2008 Mainstream Construction Group, Inc. All Rights Reserved Designed by: AJT Design & Marketing, Inc.