Ottawa Construction Association

Founded in 1889, the Ottawa Construction Association is one of the largest regional construction associations in Canada with more than 1,100 firms active in all sectors of the region's $5-billion construction market. The OCA serves its members in four major ways –Construction Project Information, Education, Networking and Advocacy.

Learn more about the OCA

**OCA Spring/Summer Hours**

Please note, the OCA is currently working under a Spring/Summer Hour schedule. From May 3rd, 2024 through to August 30th, 2024 the OCA Offices will close at 3:00PM on Fridays.


OCA Construction Comment Magazine - May 2024 issue

OCA Construction Comment Magazine - May 2024 issue Construction Comment is the official publication of the Ottawa Construction Association that is digitally distributed to key decision makers and purchasers in eastern Ontario’s construction industry.

Publish your next CSP image – Title Publish your Certificates with OCA!

Publish your Certificates with OCA! Construction purchasers, owners’ representatives and prime contractors can publish Ontario legal notices on including; Certificates of Substantial Performance, Notices of Non-Payment of Holdback, Notices of Termination, Certificates of Completion of Subcontract, Notices of Intention to Register a Condominium Link2Build charges a flat fee of just $199 per notice.

Need to schedule Commissioner of Oath services?

Need to schedule Commissioner of Oath services? This is a free service for OCA Members. Contact one of the commissioners by email during business hours (8:00am - 4:00pm), or Please call ahead for in person service. Non-members would need to purchase Virtual Witnessing at $17.70 + HST for each document witnessed.

Looking for a location to host your next meeting?

Looking for a location to host your next meeting? Meeting room rentals are for sessions which do not involve an admission or training fee. If you would like to rent a room to conduct training or any type of event for which a fee will be charged, please contact the Ottawa Construction Association directly at: and provide us with the details of the event.

OCA Membership

Membership in OCA is your investment to growing your business! Explore our website to learn more about accessing thousands of bid opportunities, marketing your firm’s services or products, growing your business network, professional development opportunities in OCA’s Education program or the numerous cost saving OCA Affinity programs.

See all upcoming courses
  • Upcoming courses

    04 June 2024
    From $300.00 excl. Tax

    Earned Value Management (EVM) for Construction

    When it comes to cost and schedule on your construction projects, do you know where you’re at and where you’re going?