Don't just take our word for it
See what our past clients have to say. 

TJ and his team at Hierarchy Architecture are industry leaders in their craft. Attentive, precise, honest and knowledgeable are only the first few words that come to mind when i think of the Hierarchy team. I would highly recommend them to work on your luxury project !

I requested a quote for a project from this firm, and the owner had the decency to call me back and refer me to someone more suitable for the type of project I was working on. In the age of "ghosting", I feel compelled to leave a review that reflects the professionalism, courtesy, and kindness I encountered, even though I didn't actually consume their services directly. I still believe that small gesture falls well within the scope for a review.

We recently completed a home remodeling project with Hierarchy Architecture, and our experience was exceptional. TJ and his team consistently demonstrated professionalism and responsiveness throughout the entire process.

From the initial design phase to the final walkthrough, TJ went above and beyond, offering insightful advice and creative solutions tailored to our needs. He truly had our best interests at heart, even providing guidance that extended beyond his typical scope of work, which proved invaluable.

The entire team was not only highly skilled but also incredibly approachable and likable, making what can often be a stressful process both enjoyable and collaborative. Their attention to detail and commitment to excellence was evident in every aspect of their work.

Working with Hierarchy was a pleasure, and we couldn’t be happier with the results. We enthusiastically recommend them to anyone looking for a top-notch architectural team that truly cares about their clients and delivers outstanding results.

I cannot say enough good things about TJ. He was like an artist when he first came to our house. Somehow he created some rooms/soace that did not seem possible. He was marking and erasing continuously until we all looked in amazement. You will not be disappointed with his creative skills. Second, he filed everything with Hewlett Neck DOB and everything wa approved then he obtained the Certificate of Completions for each permit. We have close to 5000 square feet house and we had to do a full gut job. Changes had to be made during the project. My contractor did not complete the project in time and it went over one more year. But TJ did not abandon us he came and made changes with the DOB. That’s what you need: a smart, experienced guy that is dedicated and will see the project through. Select him and you will not regret it.

Working and collaborating with TJ from Hierarchy was a great experience! From start to finish, his attention to detail was nothing short of extraordinary. He listened carefully to our needs and created a design for our home that was not only stunning but completely customized to our lifestyle.
Every element of the project felt deliberate and thoughtful, resulting in a space that is both timeless and unique. TJ's ability to blend form and function is unmatched—it’s clear they take immense pride in his work.What truly TJ apart was his ability to bring our vision to life while incorporating ideas we hadn’t even thought of. The result is a home that feels entirely ours, yet unlike anything we’ve ever seen before.
If you’re looking for an architect who delivers beyond expectations, we cannot recommend TJ and Hierarchy enough. This was a once-in-a-lifetime experience, and we couldn’t be happier!

Within hours Mr.Costello provided a prompt, and constructive response to my correspondence. I can see why he has so many 5 * ratings

After interviewing multiple architectural firms, we chose Hierarchy, and it turned out to be the best decision we could have made. TJ was with us every step of the way—from the initial design phase and navigating our village architecture review board, through multiple revisions, to helping us find a reliable contractor, and finally seeing the project through to completion.

TJ and his team were incredibly responsive to every request, whether it was simple or unconventional. While other firms dismissed our design ideas as unworkable, TJ embraced the challenge. Not only did he rise to the occasion, but he also exceeded our expectations, delivering results that went beyond anything we had imagined.

We wholeheartedly recommend TJ and Hierarchy to anyone seeking an exceptional architectural partner.

We've always admired their projects and continue to find inspiration from their beautiful designs.
Wonderful team to work with.

Working with TJ from Hierarchy was wonderful! He is an extremely talented architect and was the ultimate professional. I thought his ideas reflected what he knew would work with our lifestyle and ultimately we got a wonderful outcome. His work was timely and because of his easy going manner he worked well with the contractor and decorator. At one point the project was completely different and over time we decided that the expansion was more then we wanted. In the end we made great choices and TJ was a huge help in the decision making process. I would highly recommend him and his team!

You could not tell where the new additions began and the original structure throughout… The staff is amazing and always helpful. They are all very professional. They took care of all the necessary town permits, review boards, and there was never an issue with the Building Inspectors either. Any problems that arose were taken care of and T.J. took full responsibility. I highly recommend using Hierarchy! T.J. is a gentleman beyond belief. His main concern is making sure the customer is satisfied and his level of expertise gives you a great project!​