The Mechanical Engineering Group of D.G. Biddle & Associates Limited undertakes projects in a full range of building and construction types from minor renovations up to full new construction and from strip malls to mid-rise apartment buildings.

Working hand-in-hand with Clients and Contractors is our main focus and providing prompt service is our mandate.

We look forward to working with you soon.


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

Roof Top Unit Supply and Return Air Ducts complete with VAV Bypass System

Restaurant Tenant Fit Out