We are working hard to serve Ontario’s condo communities through our digital services. These services, including Tribunal system, Director Training and our Returns and Notices of Change services, will be temporarily unavailable while we make some necessary improvements on Friday, Aug. 19 from 8 a.m. to 11. a.m.  We apologize for any inconvenience.

PLEASE NOTE: The CAO provides support to nearly 12,000 condominium corporations across Ontario and offers helpful information and tools on many issues on our website.

To serve you better and minimize duplicate requests, we ask that you submit only one inquiry below.

CAO’s role is to provide guidance to members of condo communities across Ontario on their rights and responsibilities under the Condo Act. We’re committed to providing a safe and respectful environment for the communities we serve and for our employees. Aggressive or abusive language including profanity and harassment is not tolerated and will result in refusal of service.

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Condominium Authority Ontario

P.O. Box 69038,
RPO St. Clair Centre,
Ontario M4T 3A1

Monday to Friday:
9:00 a.m. - 5:00 p.m.  

CAO Local number – 416-901-9356
CAO Toll Free number – 844-880-5341

TTY (telephone device for the hearing impaired)

To use a Message Relay Service (MRS), please dial 7-1-1 on your TTY to reach a relay operator, or alternately use your IP relay service to connect with a relay operator.

Media Inquiries

For media inquiries, please email communications@condoauthorityontario.ca