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COVID-19 Update: ODACC is supporting public health recommendations to reduce the spread of COVID-19. We have implemented a work at home plan for all employees. We remain fully available to assist the public, adjudicators, and to manage adjudications. We also have the capability of conducting video-hearings for adjudications. You may communicate with us via email at or via phone at 416-307-0008.

About Us

Ontario Dispute Adjudication for Construction Contracts (“ODACC”) is the Authorized Nominating Authority (“ANA”) under the Construction Act. As the ANA, ODACC is responsible for administering construction-related adjudications and for training and qualifying Adjudicators.  ODACC derives its powers from the Construction Act and Ontario Regulation 306/18, accessible at the following links:

Construction Act, R.S.O. 1990 c. C.30:

Ontario Regulation 306/18

What is Adjudication?

For an explanation of what an adjudication is and the adjudication timelines, please refer to the following link: Adjudication Process. 

Adjudicator Registry

Visit the Adjudicator Registry to find a certified Adjudicator.

Becoming an Adjudicator

Only Adjudicators listed in the Adjudicator Registry are permitted to conduct adjudications and make Determinations under the Construction Act. Information on how to become an Adjudicator is available on the certification page of our website.

Commencing an Adjudication

The adjudication process commences when the Claimant provides the Respondent with a Notice of Adjudication (and sends ODACC an electronic copy). For further information on how to commence an adjudication, please refer to Commencing an Adjudication.

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DISCLAIMER: Our website provides general information on legal and related matters and should not be relied upon as legal advice.