Cornerstone - Thornhill

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Cornerstone - Thornhill, Ontario

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Welcome to Cornerstone Psychological Services in Thornhill, Ontario

Cornestone Psychological Services proudly identifies as a women-owned business dedicated to providing comprehensive psychological assessments in a welcoming and inclusive environment. Our facility is LGBTQ+ friendly, ensuring that all individuals feel safe and respected during their visits.

Planning Your Visit

When planning your appointment, it’s important to note that we recommend scheduling in advance due to the high volume of clients seeking our expert services. Our staff is here to guide you through every step of the process, from initial inquiries to final assessments.

Accessibility Features for Everyone

At Cornerstone, we prioritize accessibility for all our clients. Our location includes a wheelchair-accessible entrance and a wheelchair-accessible car park. We also provide a wheelchair-accessible toilet to ensure comfort for everyone who visits.

Our Amenities and Services

We understand that psychological assessments can be daunting. That’s why we focus on creating a supportive atmosphere. Clients have expressed appreciation for our knowledgeable staff and the thoroughness of our assessments. As one satisfied client stated, “The people at Cornerstone are highly trained, detailed, and attentive.”

Client Experiences

Many families, such as those of Michelle and Jeff, commend our team for their professionalism and warmth. They shared, “Katrina was readily available to answer any questions or concerns,” highlighting the importance of communication throughout the assessment process. Dr. Katelyn has been noted for her ability to create a comfortable rapport with children, making them feel at ease during evaluations.

Creating a Safe Space

Cornerstone is committed to being a transgender safe space, promoting an environment where every individual can feel secure while seeking psychological support. Our dedication to inclusivity and accessibility has earned us positive feedback from clients who appreciate the overall experience.

Why Choose Cornerstone?

With a strong emphasis on customer service, our staff, including Lisa and other team members, have been recognized for their exemplary care. The detailed assessments provided not only include test results but also accommodations, modifications, and strategies for both parents and schools. This comprehensive approach sets us apart in the field of psychology.

We invite you to experience the Cornerstone difference. With our commitment to quality service, extensive amenities, and a welcoming atmosphere, we are here to support you and your family in navigating psychological assessments.

Contact Us Today

To learn more about our services or to make an appointment, please reach out to us. We look forward to assisting you!

You can come to our business at

The phone number of the respective Psychologist is +1416-284-5923

And if you want to send a WhatsApp, you can do so at +1416-284-5923

We are available at these times:

Day Hours
Monday (Today) ✸
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

The website is

If you require to adjust any data that you think is not correct related to this web, we urge you to deliver a message so that we will adjust it as soon as possible. Thanks beforehand we appreciate it.

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Comments:

Showing from 1 to 1 of 1 comment(s) received.

Sean Gray (2025-05-18, 10:03 a.m.):
I would highly recommend Cornerstone Psychological Services if your child needs a psycho-educational assessment to determine learning exceptionalities and so on. Right from the beginning, my husband and I felt well-informed about the services being provided, and we received detailed information outlining the entire process, including a breakdown of fees. Katrina was always available to answer any questions or address concerns. Dr. Katelyn was very friendly and engaging with our son, and he quickly built a comfortable relationship with her. She was thorough, detailed, and patient with our son. Various areas were assessed, and a comprehensive report was provided that included testing areas, results, suggested accommodations, modifications, strategies for parents and the school, and more. Our experience at Cornerstone Psychological Services was delightful, and we were extremely satisfied with the services received. It was a pleasure working with them. Thank you, Cornerstone. ~Michelle & Jeff~
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