Here are some useful websites and contact info for creating secondary suites:

Various Websites

  1. Second Suites Information Hub - For residents in Toronto
  2. 2012 Ontario Building Code - Free Download
  3. CMHC - Permitting Secondary Suites
  4. Real Estate Council of Ontario
  5. Ontario Landlords Association

Contractor Related

  1. ESA (Electrical Safety Authority) - Home wiring regulated by ESA 
  2. TSSA (Technical Standards & Safety Authority) - Mechanical work is regulated by TSSA

Designer Related

  1. Ministry of Municipal Affairs and Housing - BCIN Licensing
  2. Ontario Association of Architects
  3. Professional Engineers Ontario

Municipal Building Departments (20 largest in Ontario)

  1. Toronto - Toronto/East York: 416-392-7539, North York: 416-395-7000, Etobicoke: 416-394-8002, Scarborough: 416-396-7526
  2. Ottawa - 613-580-2400
  3. Mississauga - 905-615-4311
  4. Brampton - 905-874-2492
  5. Hamilton - 905-546-2489
  6. London - 519-661-4555
  7. Markham - 905-475-4870
  8. Vaughan - 905-832-8510
  9. Kitchener - 519-741-2433
  10. Windsor - 519-255-6267
  11. Burlington - 905-335-7600
  12. Greater Sudbury - 705-671-2489
  13. Oshawa - 905-436-5658
  14. Barrie - 705-739-4212
  15. St. Catherines - 905-688-5601 x1660
  16. Cambridge - 519-740-4613
  17. Kingston - 613-546-0000
  18. Guelph - 519-837-5615
  19. Thunder Bay - 807-625-2574
  20. Waterloo - 519-747-8712