D.G. Biddle and Associates Limited’s building design group offers a full range of consulting and design services. We are experienced with residential, commercial, and Industrial building design and the process of obtaining building permits in the province of Ontario. With forty years of service we have developed relationships within the industry to advance projects through the permitting process and ultimately occupancy.


  • Structural Design
  • OBC Part 4
  • Concrete CSA A23.3
  • Steel CSA S16
  • Wood CSA O86.1
  • Masonry CSA S304.1
  • Building Condition Assessments


  • Stoeger Canada, Office renovation and warehouse expansion – City of Oshawa, ON.
  • Victoria Place, 3 story commercial building – Brooklin, ON.
  • Baulch Rd. Comfort Station – Baulch Rd. Park, Town of Port Hope, ON.
  • Purple Woods Heritage Hall – Oshawa, ON.
  • Oshawa PUC Transformer Vault Rehabilitation – City of Oshawa, ON.
  • Nishnawbe Apartments – City of Oshawa, ON.
  • Treetop Eco-Adventure Park Zip Line TSSA Approval – City of Oshawa, ON.
  • Potter Settlement Winery – Tweed, ON.
  • Oshawa Hangarminium – City of Oshawa, ON.

Timber Frame Structure Purple Woods Heritage Hall

Custom Residential Structure