This design development brief is intended to provide updated framing summaries of new TRCA Head Office Development to aid in preliminary level coordination and costing further to high level April 2018 schematic design brief. This report is based on coordination meetings that have taken place so far in 2018 with design team; concept presentation material received April through June prepared by ZAS Architects in J.V. with Bucholz Mcevoy Architects; and supplemental geotechnical investigation report #1790557 prepared by Golder Associates dated May 18, 2018. Only typical designs have been undertaken as part of this brief with most values provided based on past development works of similar structural type and magnitude. This document supersedes any earlier documents circulated.