The Mechanical Engineering team at D.G. Biddle & Associates Limited undertakes projects in a full range of building and construction types including minor renovations and new construction for projects ranging from strip malls to apartment buildings.


  • Heating, ventilation and air conditioning designs
  • Kitchen hood suppression systems design
  • Domestic plumbing and drainage design
  • Process piping design including boilers and chiller systems
  • Rain water harvesting
  • Sprinkler scope of work design and coordination with fire alarm system


  • Cobourg Police Station – Renovation, Cobourg
  • ReMax Jazz Oshawa Office Building – New Construction, Oshawa
  • TVM Apartment Building – Renovation of St. Joseph’s Hospital, Peterborough
  • Apple Tree Academy Day Care – Tenant Fit Out, Whitby
  • Stockworth Plaza – New Construction, Brooklin
  • Blackstock Community Centre – Renovation and Kitchen Upgrade, Blackstock

Rooftop Unit Supply and Return Air Ducts complete with VAV Bypass System

Restaurant Tenant Fit Out