D.G. Biddle and Associates Limited’s building design team 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 five years of service we have developed relationships within the industry to advance projects through the permitting process to 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 – Oshawa
  • Victoria Place, 3 story commercial building – Brooklin
  • Baulch Rd. Comfort Station – Baulch Rd. Park, Port Hope
  • Purple Woods Heritage Hall – Oshawa
  • Oshawa PUC Transformer Vault Rehabilitation – Oshawa
  • Nishnawbe Apartments – Oshawa
  • Treetop Eco-Adventure Park Zip Line TSSA Approval – Oshawa
  • Potter Settlement Winery – Tweed
  • Oshawa Airport Hangarminium – City of Oshawa

Timber Frame Structure Purple Woods Heritage Hall

Custom Residential Structure