Hierarchy Architecture + Design, PLLC

TJ and the entire team at Hierarchy were a dream to work with. They designed, created plans for, handled permits for, and helped us implement a major interior full- home renovation. They were knowledgeable, professional, timely, responsive, and were able to create great solutions to some issues that we faced along the way. We were so pleased that we are also using them now for the second phase of our renovation, which is the exterior. Cannot say enough positive things about this firm, and would enthusiastically recommend them to anyone.

TJ and his Hierarchy team are simply fantastic. Hierarchy's professionalism, thoroughness and willingness to go above and beyond underscore a commitment to reaching and exceeding its clients goals and dreams. Thank you for all you do!

We hired TJ and his team for an extensive renovation of our home, where we built a large addition and redesigned the entire layout of the basement, first and second floors. As first time home owners, we had no idea what to expect, but much of our anxiety was alleviated knowing that TJ and his expert team were guiding us through the process. From the initial sketches to the finishing details, I can attest to TJ's patience, creativity and resourcefulness, as he was able to provide practical solutions to the many challenges we faced updating our one hundred year old home, without sacrificing its original charm. I highly recommend Hierarchy Architecture for your next project!

I worked with TJ on a large renovation project which included reconfiguring an entire first floor and basement as well as changing the facade of the house to open up the front and bring a modern touch to an old structure. TJ and his team member William did not disappoint. Not only the design was beautiful and met all expectations but TJ was responsive to phone calls and always on time for sight visits. TJ is talented and professional, has a very refine taste and is attuned to the needs and wants of his clients.

We hired TJ to help us with drawing plans to extend our family room and build a master bedroom on the first floor, as well as improve the flow of the house and improve access to the backyard. TJ and his team were very responsive, very creative, thorough and familiar with the pertinent codes and regulations in our neighborhood. They proposed multiple plans and options, and even broke it down in phases , to enable us to decide how much, how little to do. TJ also has great working relationships with local contractors with is a huge plus. I highly recommend Hierarchy Architecture & Design PPLC.

TJ and William from Hierarchy are now family. I have worked on 2 projects with Hierarchy and can attest to the quality, support and guidance this company provides. Current project is a monster in Old Westbury, NY and I am very happy with results. These guys are PROS!

We worked with J.J. Costello and staff at Hierarchy through most of 2019 to decide what to do with a screened porch that either needed to be rebuilt as is or, more likely, replaced by a newly enclosed new room off our living room. The entire project, from start to finish, was fantastic. Hierarchy was able to tactfully steer us clear of my unprofessional suggestions, developed plans for a beautiful hip roof addition with a vaulted ceiling inside, and coordinated perfectly with our contractor. The result is a fantastic new room in which we’re spending many pandemic hours. Once COVID is behind us, we’ll be picking up a second project with Hierarchy on the redesign of a bathroom. We’ve heard horror stories of architect/contractor experience; ours is clearly not one of them. We would recommend T.J. and Hierarchy to anyone.

Love working with Hierarchy! The design of our home is beautiful and unique. We love how it transformed. Everyone is very nice and easy to work with. Will hold your hand through the process if need be. Our journey has not ended as we will continue to work with them on future projects!

We used Hierarchy Architecture + Designs, PLLC to convert a retail space into a medical office. With TJ’s wealth of knowledge, the process was smooth, and obtaining permits was a breeze. Most importantly, he listened and brought my vision to life. I highly recommend this firm.

After searching for months for an architect with recommendations from contractors, friends and family for our renovation we decided on Hierarchy for their professionalism, vision, quick response and more importantly receptiveness to our culture and belief. I’m a strong believer in feng shui and TJ was very receptive to that and worked with me in incorporating it into our plans. Give Hierarchy a call you won’t regret it.

TJ listens carefully, thinks comprehensively, decides wisely, and keeps all people involved fully informed. He helps all involved make delicate decisions and he carefully considers the options and the costs. TJ has superb leadership skills in addressing a group of people that may have different priorities but a common goal. He clearly and succinctly describes what has to be accomplished and elicits comments and suggestions and, where needed, makes appropriate responses.

We highly recommend Hierarchy Architecture. TJ and and his associates (we love Susan Frooks!!) are professional, creative architects and very easy to work with. We completed a kitchen renovation with TJ and Susan last year and were very happy with every phase of the project. They were wonderful and accomodating when we changed our mind about the design several times, and saw the project through to completion. We are now working on our second project with Hierarchy, which entails building a den and upper story addition. We continue to be thrilled with the service that we receive.

TJ designed the addition and renovation of our house in Manhasset. He helped us through the whole process from the designs, blueprints for the contractor, permit applications, and checking in on the progress of the work. He is passionate about his work, listened to what we were looking for, and responsive to our schedules. We highly recommend TJ and Hierarchy Architecture + Design.

TJ and his team did an incredible job redesigning our home. We absolutely love the results. Very professional team and lovely to work with.

Hierarchy is a truly outstanding organization. TJ Costello and his team are precise, diligent, flexible and professional. We worked with Hierarchy on the design of the renovation of our new home and could not have been more pleased with the results. TJ’s attention to detail and willingness to roll with our desired changes during the process – all with a smile – made our project easy and enjoyable. Additionally, Hierarchy agreed to assist us with addressing open permit issues on our prior residence despite rarely taking on such work given their extremely busy design practice. In short, we have no hesitation in providing Hierarchy with 5 stars and highly recommend TJ and his team!

TJ designed our renovation plan and followed the whole project to make sure things are done the way they should. We had a expansion/restructure project and had no experience. TJ is professional, knowledgeable and patient in answering our questions and providing different options for us to consider. There is one area we did not take his suggestion and now we regret it! TJ also helped us communicate with the town to get proper approval. The other services he referred such as survey and inspection are also high quality. We are very grateful for his help through out this long project!

The Hierarchy team is worthy of more than 5 stars! From the beginning of my project through to the end TJ, William and the team were incredibly patient, responsive and committed to my project. Even my contractor mentioned "they work with many firms on LI and have never seen a team more responsive and proactive and communicative as Hierarchy has been." I highly recommend Hierarchy for any project you are considering!

My husband and I hired Hierarchy for our home renovation project in 2017, and we couldn’t be happier with our decision. It was our first ever renovation and we didn’t know what to expect. TJ and his team (Ben, William, Susan)are true professionals, they guided us step by step through the entire process, took time in explaining the details, and turned around with solutions quickly whenever an issue came up. TJ is extremely knowledgeable, detail oriented, and well-respected by the local community. My town is notoriously strict with building board requirements, and we were able to get our plan approved swiftly with TJ’s beautiful design and deep experience. We also went with his recommendation for general contractor and kitchen designer, as we know when we work with a great architect, we get to work with the network of good people that he trusts, and the results proved us correct. We are very happy with our “new” house, and will highly recommend TJ and his team.

I have worked with Hierarchy and T.J. Costello in the past and am very happy with the results. The team at Hierarchy is talented and professional. They do a beautiful job incorporating additions on to existing homes so that they appear seamless and stay true to the character of the house. They also create special elements when working with existing space. Lots of people can make rooms look great but not everyone has the vision to create something special and unexpected that surprises out of that existing space.

TJ is a very talented and artistic architect. He is creative in maximizing space for a given footprint. I recommend his services.

TJ recently helped us renovate a classic center hall colonial. He has amazing creativity and a deep appreciation for classic architecture; we knew we were in great hands for our project every step of the way. TJ and William exhibited the highest degree of professionalism -- honest, kind, and responsive -- at all times. We are extremely fortunate to have had TJ's experience guiding our project, and hope to work with Hierarchy again in the future.

We contacted Hierarchy after seeing work done at a friends home. We met TJ Costello and were immediately impressed. During all phases of the project and renovation, he went on the journey with us, coming up with creative ideas for the space with vision and enthusiasm. What he could see for the future of our empty square footage was amazing. As things developed and we could see his plans come to life he was always patient with our never ending questions and took all of our ideas into consideration with respect and an understanding of our needs. We now have an extension bigger than we could have imagined and it looks and feels like it was part of our homes original structure….we look forward to our next project!

I am a Real Estate Salesperson in the North Shore of Long Island. I definitely recommend Hierarchy for their excellent work.

I have known TJ Costello for over 20 years. He did the first renovation on our kitchen in 1992 and subsequently has been the architect for a number of other projects - kitchen and family room extensions, and most recently a total remodeling of the interior - opening up walls and taking advantage of the park behind our home. TJ is creative, diligent and a good listener. His staff is knowledgeable, friendly and always accessible. I would highly recommend TJ for any type of project - you will be more than happy with the results.

TJ and company recently helped us on a major renovation. He and his associates are great to work with! They are flexible, thorough and detail-oriented...they are also well-connected in town. I highly recommend them to anyone looking for an architect.

We have known TJ's work for a long time. Each of his projects in manhasset were fantastic in their own way. After buying a house in manhasset that he and his company renovated, there was only one choice for our summer home's kitchen, extension, hall way and mudrooms. The attention to detail and first class work is amazing.

Working with TJ and his team on our remodel was such a wonderful experience. He understood my "vision" and it turned out better than I could have ever imagined. He is very professional. He and his team checked in almost weekly throughout the entire construction which was reassuring. I highly recommend this firm.

TJ and his staff are professional, knowledgeable, and cost-efficient. We renovated our house and encountered numerous problems caused by first contractor, but TJ was there to help us every step of the way and understood our concerns. Highly recommended.

We have worked together with Hierarchy on multiple jobs, and have always had a great experience with TJ and his team. TJ is very gifted at what he does, and his attention to detail results in some extraordinary homes!

We hired TJ for a substantial home renovation and expansion in 2014. We are completely ecstatic with the plans and outcome that TJ created for us and have recommended him since to numerous neighbors and friends, two of whom recently hired him. TJ and his team are true professionals, easy to work with, and have great solutions to problems that arise. All in all, great experience and would confidently recommend Hierarchy to anyone.

Simply put, the reason we bought our house in 2001 was because TJ had turned it into such a gem with the previous owner. Over the years, when we've done our own renovations (some small and some more extensive) we have always used TJ and Hierarchy. TJ's attention to detail is wonderful and he has a gift of being able to maximize limited spaces. His knowledge of all things architectural is not only fun and interesting, but it's also integral in making sure the new addition blends seamlessly. I recommend TJ and Hierarchy highly.

TJ Costello and his colleague, Susan Frooks, are talented Architects who are delightful to work with because they are talented, professional, and collaborative. We touched practically every interior and exterior surface in our gut renovation project and while it was a long process, TJ and Susan made sure that our house worked for us aesthetically and practically. Having lived here for a year, we do not regret any architectural elements of our house. Finally, what speaks volumes for us is that we miss working with those guys -- again, they were just a delight to work with.

I am freshly off a one year, major renovation of my 1930 Farmhouse...I met with four architects and chose Hierarchy because they suggested they would design for me a version of what I wanted in a form that I could afford, that could be built in a timely basis, and would be "exactly" what I wanted, only better! I have learned over this time that being a good architect demands a long list of skills and talents that are not so obvious before hiring one...an architect must listen carefully and understand what you want, and bring to you multiple designs, and ideas that capture what you want in a version that is so much better, more elegant, more sophisticated, and in a better form of design and engineering then you ever imagined...like having someone interpret your dreams for your home in to a functional, affordable form that can be executed on site by others. That's what TJ Costello does. And he makes it fun...you end up loving the process. Remember, your architect isn't swinging a hammer, so his drawings and plans have to be clear, and perfectly drawn. The plans Hierarchy drew were literally perfect....down to every electrical plug, light, wire, wall, stud, and especially structural elements. Every tradesmen examined the plans without question and every town and village official approved all plans (and changes) immediately. The Hierarchy staff (especially TJ Costello) are imaginative and creative and can see solutions where there is not obviously one...TJ has ideas for everything that comes up, and is so generous to offer them, no matter how small, or complicated...and I had lots of both! We had so many issues that we had to seek his consult (and his excellent staff) I can't even recall...He was always available by some form (e.g. phone, email, text, etc) ...so you never felt that there wasn't a "source" to go to with a question. When I talked about lighting fixtures he gave me his personal ,architects version of a massive catalog where we ended up buying all our fixtures...when we complained about a vendor's performance he called them on my behalf and got them on track...he really is like your smart, creative best friend, that you can call and visit and get just the perfect solution...he has great taste, and excellent style...and offers all this to you as a client. He and his staff are really " Yes " people. They just get things done. And his fee? Okay...maybe not the cheapest, but very fair, and once your are a client, you have the perfect partner to share every concern, question and even celebrations. He and his staff are as happy for us now that the job is done, as we are. Look....there are lots of architects you can hire...but for the creativity, imagination, "easy-to-work-with" attitude, accessibility intelligence, ....there is no other firm you can a better result from then Hierarchy.

There are many reasons that Hierarchy is considered to be Manhasset's premier architectural firm. The depth of knowledge that TJ Costello and his entire team bring to a project is extraordinary. Their easygoing professionalism makes them easy to work with and responsive to all questions, suggestions and needs. They designed a new portico and a second story addition for our home. Both look as if they always been here, which we believe to be the ultimate sign of a successful renovation. What is most impressive about TJ is his attention to detail. For example, he was driving by our house one day when shutters were being installed. He stopped his car and instructed the workers to move the "S" hooks on the shutters over about an inch or so. This is just one instance of his eye for particulars and level of commitment that made our project a success. We highly recommend Hierarchy.

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. I think 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!

Our house is a fixer upper, we knew that we would need to do a lot of work on it. We interviewed a few architects (one was pushing hard to completely demolish it, another was just trying to beautify what we already had, etc). My co-worker recommended Hierarchy. When we met TJ, he really stood out. My wife immediately called him "man with the vision". He sketched a proposal (in the first meeting) and very clearly explained how his rough ideas will be the most cost effective way for us to get what we want. The net result is that TJ converted our split-level old house into a new traditional colonial. There is a perception that Hierarchy is more expensive than other architects in the neighbourhood. TJ , Susan and their entire team is worth every penny! However, this is still a mere perception. TJ comes up with ideas that are so much better than what you had in mind, that you just want to go with them. Some ideas require a bit more spending in the short term, but are big wins in, say, 5 years time (it is really an investment) Hierarchy is a very professional team. TJ has the vision, Susan (she is awesome!) is very practical and the two of them balance each other out quite well. Hierarchy is well respected by building inspectors, design review boards, architectural review boards, contractors. Manhasset is known for long cycles to get your plan and design approved, Hierarchy got our fairly large project approved in one pass (which is rare)! - Hierarchy is a one stop shop. They will take care of your every need. There is a lot of handholding that you get from them every step of they way - They are very accessible. TJ works long hours, if you need him, he will call you back the next day at the latest. There were a few times, when my builder was stuck, or building inspector had questions. Susan, would come on site the next morning, 8:00 am sharp - Hierarchy will keep you from making mistakes whether it is over-spending, or contractor, or your own silliness. They are always on the look out for cost saving opportunities, they really care - They will give you an advice on just about anything: what windows to pick, what insulation to use, do you need to waterproof, color of siding, thickness of the roof, relative pricing of subcontractors, recommendations. Overtime you build up a lot of trust with them. We are very happy with TJ, Susan and Hierarchy. I highly recommend them!

The staff at Heirarchy is fabulous. They did a renovation and addition to our house and we absolutely love it. Not only are they creative and smart, but they also helped with all of the approvals with the town. They made our house functional for our family while maintaining its original character and charm.

TJ and staff did a major renovation to my house. We added three bedrooms, family room, new kitchen, including a master bedroom and bath. The transformation was unbelievable and everything I dreamed of....I enjoyed the whole process and it was well worth it! It was a pleasure working with them and they did a fantastic job on my house!

TJ Costello of Hierarchy Architects & Designs created an amazing back porch for my Georgian Center Hall Colonial home a few years ago. His designs were in keeping with the traditional style of the house. From the slate roof, to the crown molding, to the real brass screens, every detail was beautiful. TJ stayed close to the complete renovation as the construction took place. The finished project was featured in This Old House Magazine, but more importantly, it gave my husband and I a great new space to sit and chill. While it might have been one of TJ's smaller projects, but he put a great deal of effort into it on our behalf.

TJ Costello is great. He was the best architect we interviewed and are extremely pleased with the outcome of the project. He helped us with a complete kitchen remodel including a bumpout as well as a basement remodel. Cannot recommend him enough!! He was exceptionally helpful during all phases of our kitchen extension and renovation. He is very patient, took all of our ideas into consideration and added so much value to the overall project. I would highly recommend him!

We work with Hierarchy Architects frequently. Not only do we enjoy their easy-to-work with manner, but our clients do as well. TJ Costello is an honest, friendly gentleman who brings a unique brand of intelligence to every project. TJ's approach to a job is always multi-faceted, seeing not one, but several solutions to the renovation. In the end, his work is seamless to the environment; an outcome that always exceeds expectations. When Hierarchy is on the job, you can rest assured that their years of know-how and soup to nuts oversight will be instrumental to the getting job done right the first time.