Mattamy Homes has hired industry leader Subhi Alsayed in the new role of vice president, sustainable development at the company.

This video report looks at greening new and existing condos. Commentators: Heenan Blaikie's Armand Conant, Tridel's Subhi Alsayed and Toronto Atmospheric Fund's Mara Del Bianco.

What is the difference between a consulting engineer and an energy consultant? And when should a building owner bring an energy consultant on board? Morrison Hershfield's Subhi Alsayed explains.