--- title: "Hierarchy Architecture + Design, PLLC — Kitchen & Bath Designers | Houzz" canonical_html_url: https://www.houzz.com/professionals/kitchen-and-bath-designers/hierarchy-architecture-design-pllc-pfvwus-pf~1166105825 markdown_url: https://www.houzz.com/md/professionals/pf~1166105825.md entity_type: LocalBusiness business_name: "Hierarchy Architecture + Design, PLLC" category: ["Kitchen & Bath Designers"] image: https://st.hzcdn.com/fimgs/4313659803d9c901_1163-w400-h400-b0-p0--.jpg address: "7 Gaynor Avenue, Manhasset, New York 11030, United States" latitude: 40.7934 longitude: -73.6888 phone: "(516) 627-7007" website: http://hierarchyarchitecture.com rating: 5 review_count: 41 best_of_houzz_awards: 16 followers: 239 last_updated: 2026-09-03 --- # Hierarchy Architecture + Design, PLLC Original Houzz profile: [Hierarchy Architecture + Design, PLLC](https://www.houzz.com/professionals/kitchen-and-bath-designers/hierarchy-architecture-design-pllc-pfvwus-pf~1166105825) ## Professional summary - **Primary category:** Kitchen & Bath Designers - **Location:** Manhasset, NY - **Serves:** New York City, Oyster Bay, Mount Vernon, Glen Cove, Rockville Centre, Garden City, Syosset, Port Washington, Jericho, Baldwin Harbor, Manhasset, Flower Hill, Manhasset Hills, Muttontown, Brookville, Lake Success, Munsey Park, Sands Point, Laurel Hollow, Oyster Bay Cove, Plandome, Baxter Estates, Plandome Manor - **Houzz rating:** 5.0 out of 5 (41 reviews) - **Best of Houzz:** 16 awards (2014–2026), for Design, Service. ## About ### Houzz Badges - Star Houzzer - Houzz Influencer - Recommended on Houzz - 25,000 Ideabook Saves - Best of Houzz winner - Online consultation - High-end We are a Long Island based architecture firm serving the Tri-state area, and beyond. We provide our customers with a wide range of architectural services from large ground-up projects and full scale renovations, to smaller scale kitchen renovations and custom millwork solutions. Simply put, we help you build your dream home. We are committed to providing you with the best customer service, we are there for you at every step of the design and build phases. Planning and building a home can be complex and demanding on your time but we will work with you to make this as pleasant and trouble-free as possible. T.J. Costello is Hierarchy's Principal Architect and distinguishes himself by being the only dual Certified Architect and Kitchen Designer on Long Island. TJ and his team of experts have over 35 years experience in the industry, and specialize in creating timeless homes that are seamlessly integrated into a neighborhood's existing context. We recognize that each client is unique, and we customize our service for each home to match your individuality, bringing your vision to life. We specialize in (but are not exclusive to) creating custom residential, primary & vacation homes in modern, traditional or transitional styles. We design our homes with the utmost care and attention to detail, ensuring our clients are ecstatic with the finished product. TJ graduated from Cornell University, and also has certificate of Construction Managment from NYU, and is a CKD Certified Kitchen Designer with NKBA, and is a certified CLIPP Certified Living In Place Professional. TJ has presented projects at over 38 different Town Boards & Village hearings, and as has personally served in various roles for local ARB, BZA committees. ### Services Provided - Kitchen Design - Custom Cabinets - Bathroom Design - Custom Kitchen Cabinets - Custom Bathroom Vanities - Home Additions - Custom Pantries - Lighting Design - Design Consultation - Laundry Room Design - Floor Plans - Home Extensions - Project Management - Mudroom Design - Universal Design - Outdoor Kitchen Design - Custom Walk-in Closets - Sustainable Design - Basement Design - Drafting - Handicap-Accessible Design - Wine Cellar Design - Custom Cabinet Doors - Kitchen Remodeling - Bathroom Remodeling ### Areas Served - New York City - Oyster Bay - Mount Vernon - Glen Cove - Rockville Centre - Garden City - Syosset - Port Washington - Jericho - Baldwin Harbor - Manhasset - Flower Hill - Manhasset Hills - Muttontown - Brookville - Lake Success - Munsey Park - Sands Point - Laurel Hollow - Oyster Bay Cove - Plandome - Baxter Estates - Plandome Manor ### Typical Job Cost $800,000 - 4,000,000 Renovation: $800K - $900k New Home: $1M - $4M ## Business Details | Field | Value | | --- | --- | | Business Name | Hierarchy Architecture + Design, PLLC | | Address | 7 Gaynor Avenue, Manhasset, New York 11030, United States | | Phone | (516) 627-7007 | | Website | http://hierarchyarchitecture.com | | Followers on Houzz | 239 | **Social profiles:** - Facebook — www.facebook.com/hierarchyltd - LinkedIn — http://linkd.in/1dSTqXl - Blog — http://www.hierarchyarchitecture.com ## Contact - **Houzz profile:** [Hierarchy Architecture + Design, PLLC](https://www.houzz.com/professionals/kitchen-and-bath-designers/hierarchy-architecture-design-pllc-pfvwus-pf~1166105825) - **Website:** http://hierarchyarchitecture.com - **Phone:** (516) 627-7007 ## Credentials **Certifications & Awards** - Best of Houzz 2014, 2015, 2017, 2018, 2024 - CKD - Certified Kitchen Designer - RA - Registered Architect - AIA Member - American Institute of Architects - NKBA Member- National Kitchen & Bath Association - CLIPP- Certified Living In Place Professional - BBB Member - Better Business Bureau - **Best of Houzz:** 16 awards (2014–2026), for Design, Service. **Affiliations** - [The American Institute of Architects](https://www.houzz.com/professionals/schools-and-organizations/the-american-institute-of-architects-pfvwus-pf~1350720471) - [National Kitchen & Bath Association](https://www.houzz.com/professionals/schools-and-organizations/national-kitchen-and-bath-association-pfvwus-pf~1351084655) ## Reviews **Overall rating: 5.0 out of 5 — 41 reviews** *Aspect averages:* - Work Quality: 50.0 - Communication: 50.0 - Value: 47.0 ### Reviews **★★★★★ — Susan Askinazy, Nov. 2021** > 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. **★★★★★ — Greg Torborg, Nov. 2021** > 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! **★★★★★ — grahamlaine, Jan. 2021** > 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! **Comment from Hierarchy Architecture + Design, PLLC:** > Thank you for this wonderful review Graham! We love the challenge of restoring and updating older homes while staying true to the original design. We were very pleased with how your project turned out as well! **★★★★★ — OGÁN DECOR, Jan. 2021** > 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. **Comment from Hierarchy Architecture + Design, PLLC:** > Thank You Tania, it was a pleasure working with you and your family. **★★★★★ — HU-550993485, Dec. 2020** > 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. **Comment from Hierarchy Architecture + Design, PLLC:** > Thank you so much for your kind words! We always strive to be flexible and offer our clients multiple solutions to best cater to their needs. We hope you continue to enjoy your new home for many years! **★★★★★ — Arthur Samandar, Dec. 2020** > 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! **Comment from Hierarchy Architecture + Design, PLLC:** > Arthur, our team was incredibly excited that we were able to work together with you on your second project after the success of the first one. It's always a pleasure to work with you and we hope to cross paths again in the future. Wishing you all the best! **★★★★★ — HU-955650289, Dec. 2020** > 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. **Comment from Hierarchy Architecture + Design, PLLC:** > Thank you for this wonderful review! We are glad you are getting lots of use and enjoying the new room addition. We look forward to working with you on subsequent projects! **★★★★★ — Tracy Chu, Dec. 2020** > 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! **Comment from Hierarchy Architecture + Design, PLLC:** > Tracy, we appreciate you taking the time to give us this generous review. It truly touches our hearts when our clients recognize our hard work. It would be an honor to be a part of you journey and continue working with you in the future! **★★★★★ — HU-27712769, Dec. 2020** > 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. **Comment from Hierarchy Architecture + Design, PLLC:** > Thank you for the kind words! Listening to our clients and making sure the whole process runs smoothly are key focus areas for our team and things we take great pride in! We hope you continue to love the results! **★★★★★ — HU-103358480, Dec. 2020** > 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. **Comment from Hierarchy Architecture + Design, PLLC:** > Thank you for this glowing review! Being flexible with our clients' wants and needs is of utmost importance as this is how we ensure that the end result is something they will truly fall in love with. We hope you love your new home! **★★★★★ — Rita Eredics, Dec. 2020** > 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. **Comment from Hierarchy Architecture + Design, PLLC:** > Rita, thank you for this wonderful review! Our team can't stress enough what a pleasure it was to work with you on your project! **★★★★★ — Caryn Sawyer, Dec. 2020** > 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. **Comment from Hierarchy Architecture + Design, PLLC:** > Thank you Caryn! It is always rewarding when a past client comes back to work with us again. We hope you are thrilled with the end result of your new addition! ## Selected projects - [Mid-Century Modern Makeover](https://www.houzz.com/hznb/projects/mid-century-modern-makeover-pj-vj~6648857) - Location: Manhasset, NY - Photos: 7 - Description: This gorgeous Mid-Century Modern makeover included a second story addition, exterior and full gut renovation. Clean lines, and natural materials adorn this home with some striking modern art pieces. Photographer: Brian Berkowitz - [Patio & Pool Makeover](https://www.houzz.com/hznb/projects/patio-and-pool-makeover-pj-vj~6648848) - Location: Manhasset, NY - Photos: 7 - Description: This pool and backyard patio area is an entertainer's dream with plenty of conversation areas including a dining area, lounge area, fire pit, bar/outdoor kitchen seating, pool loungers and a covered gazebo with a wall mounted TV. The striking grass and concrete slab walkway design is sure to catch the eyes of all the guests. Photographer: Adam Kane Macchia - [Center Hall "Glamonial"](https://www.houzz.com/hznb/projects/center-hall-glamonial-pj-vj~5535292) - Location: Manhasset, NY - Photos: 14 - Description: What do you get when an Architect renovates a traditional Georgian Center Hall brick Colonial, with a glamorous hip family, and a modern young interior designer? A Center Hall "Glamonial". While the soul of the original Center Hall layout did not change, maintaining the center hall flanked by the Dining Room and Living Room, the family room in the rear is where the new design soars. Our team took a fresh look at the juxtaposition of the family room to the kitchen and library and formal spaces an… - [1920 to 2020](https://www.houzz.com/hznb/projects/1920-to-2020-pj-vj~6640920) - Location: Not specified - Photos: 12 - Description: This project was an update of an old 1920's home to a more Modern, Transitional style. The home features custom panel molding throughout with unique built-in features like the hideaway closet near the front entry and the beautiful textured wallpaper throughout. Interior Design by Emily Rand Interiors - [A "Great Room" for Hosting](https://www.houzz.com/hznb/projects/a-great-room-for-hosting-pj-vj~6648832) - Location: Not specified - Photos: 5 - Description: Lovely new kitchen and great room with plenty of custom features. Lots of natural light creating a bright, open space that is perfect for hosting! Kitchen Designer: Showcase Kitchens Photographer: Creepwalk Media - [The Modern Victorian](https://www.houzz.com/hznb/projects/the-modern-victorian-pj-vj~3279611) - Location: Garden City, NY - Photos: 16 - Description: This Second Empire Victorian, was built with a unique, modern, open floor plan for an active young family. Nestled mid-block on a tree lined street, it was conceived in to reflect the neighboring historical context, and respect the former original home which occupied this site. The challenge was to design a Transitional Victorian home, honoring the past and creating its own future story. A variety of windows, such as lancet arched, basket arched, round, and the twin half round infused whimsy and… - [Traditional Elegance With a Pinch of Industrial](https://www.houzz.com/hznb/projects/traditional-elegance-with-a-pinch-of-industrial-pj-vj~6648797) - Location: Manhasset, NY - Photos: 12 - Description: Classic designs have staying power! This striking red brick colonial project struck the perfect balance of old-school and new-school exemplified by the kitchen which combines Traditional elegance and a pinch of Industrial to keep things fresh. - [Colonial Refacing](https://www.houzz.com/hznb/projects/colonial-refacing-pj-vj~6640887) - Location: Not specified - Photos: 6 - Description: Refaced Traditional Colonial home with white Azek PVC trim and James Hardie plank siding. This home is highlighted by a beautiful Palladian window over the front portico and an eye-catching red front door. Photographer: Adam Kane Macchia - [French Normandy Revival](https://www.houzz.com/hznb/projects/french-normandy-revival-pj-vj~2656989) - Location: Manhasset, NY - Photos: 27 - Description: This project breathed new life into an original French Normandy Tudor in the Manhasset, New York. A full interior renovation updated the interior in a Transitional style that blended elements of the old Tudor home with a more Contemporary style. The exterior was restored in a careful manner to preserve the character of the home, but return it to it's original magnificence. - [Cosmopolitan Chic](https://www.houzz.com/hznb/projects/cosmopolitan-chic-pj-vj~1154262) - Location: East Hills, NY - Photos: 14 - Description: A typical 1960s colonial updated on the outside and inside in a 'Cosmopolitan Chic" style. Home was remodeled for young-ish empty-nest couple who wanted to turn their house into an upbeat adult cosmopolitan home rather than getting a pied-à-terre in Manhattan. The result was a clean and open concept, for relaxed entertainment of mixed age groups. The home owners enjoy entertaining other couples and family friends but the design is also perfect for when their children come home to visit (young ad… - [Next Level Ranch](https://www.houzz.com/hznb/projects/next-level-ranch-pj-vj~3030543) - Location: Manhasset, NY - Photos: 24 - Description: This 1940’s Custom Cape Ranch was long overdue for a major overhaul and received one with this full renovation and addition. With the brand new construction, in 2018, an entirely new second floor was added to the home. The corner of the home was squared off to enlarge the kitchen which features a skylight monitor. The classically detailed arched doorways and original wainscot paneling in the living room, dining room, stair hall and bedrooms were kept and refinished, as were the many original red… - [The Park View](https://www.houzz.com/hznb/projects/the-park-view-pj-vj~2301893) - Location: Manhasset, NY - Photos: 18 - Description: The home happens to open onto a lovely public park, therefore, views to it from all of the rooms was essential. The existing rooms at the front of the house were cloistered off with solid load-bearing plaster walls from 1940's and meaning only rear-facing rooms had views of the park. To solve this, we created axial cased opening's between the rooms creating viewing opportunities from the front room. Additionally this helped improve the circulation flow of the home. The entire house received a so… - [Move That Fireplace!](https://www.houzz.com/hznb/projects/move-that-fireplace-pj-vj~2618237) - Location: Manhasset, NY - Photos: 19 - Description: This beautiful Manhasset home was in desperate need for a full home renovation. We expanded the footprint of the home to create a great room with kitchen & dining area, and living room. The existing living room was split into 1/3 & 2/3 creating a small living room, nicknamed the 'Clubroom'. The fireplace was relocated from the exterior wall to the middle of the room creating a double-sided fireplace that opens to the back 2/3 of the living room. Relocating the fireplace exposed 8 feet of wall wh… - [New Millennium Colonial](https://www.houzz.com/hznb/projects/new-millennium-colonial-pj-vj~1185639) - Location: Manhasset, NY - Photos: 29 - Description: This 1940's Central English Colonial was updated into this millennium including an addition at the rear of the home which added a large kitchen, family room and breakfast bay area. An open stair loft was created on the second floor to allow sunlight to flood into the upstairs hall. Three bedrooms were added upstairs as a part of the addition and the sun room was "winterized" to convert it to a year round ladies home office. The landscaping was designed by Greg Maratt of Bayview Landscaping. Loca… - [Georgian Colonial Update](https://www.houzz.com/hznb/projects/georgian-colonial-update-pj-vj~1245489) - Location: Manhasset, NY - Photos: 25 - Description: Full top to bottom renovation done in a Traditional style. This was a one year renovation with all new mechanical systems, plumbing, and electric. The classic massing of this Georgian Colonial home were retained in the central core, and new wings were designed on the right and left. A large rear extension contains the kitchen, breakfast room, family room, mudroom, rear staircase, and sun room. The oversized lot allowed for a matching 2.5 car garage. Location: Plandome, New York Services: Home Ex… - [White & Stainless](https://www.houzz.com/hznb/projects/white-and-stainless-pj-vj~1769537) - Location: Manhasset, NY - Photos: 9 - Description: This kitchen and dining room expansion created a central hall that connected the two rooms and the living room. Previously travelling to the kitchen and back of the house was inconvenient. Original dining room was carved into thirds to create the hallway and the new dining room was added at the end of the living room. The kitchen was renovated in a Contemporary style and consists of white cabinets & countertops with stainless steel appliances & lights, and medium hardwood floors. Unique storage… - [The New Brick Colonial](https://www.houzz.com/hznb/projects/the-new-brick-colonial-pj-vj~1296860) - Location: Flower Hill, NY - Photos: 3 - Description: An original Long Island Colonial home was knocked down and replaced by this beautiful traditional brick colonial. Location: Plandome, New York Services: Ground-up Architecture, Landscape Architecture, Interior Design, Kitchen Design, Bathroom Design Firm: Hierarchy Architects + Designers Architect: T.J Costello Photo Credit: Brian Jordan - [Flawlessly Functional](https://www.houzz.com/hznb/projects/flawlessly-functional-pj-vj~836613) - Location: Manhasset, NY - Photos: 7 - Description: This Transitional renovation combined four rooms to create one large white kitchen / great room space. At the far end of the room an adult sports bar was created, with family gatherings in mind. The existing field stone fireplace was kept in the center. An incredibly large walnut wood island, with custom white shaker cabinets, was added allowing for both cooking and social gathering. Retained and salvaged existing subzero refrigerator from former renovation, and built new cabinets around it with… - [Gold Coast Tudor](https://www.houzz.com/hznb/projects/gold-coast-tudor-pj-vj~1005566) - Location: Manhasset, NY - Photos: 19 - Description: This was a gut renovation of original Levitt 1920's Normandy Tudor home in the North Strathmore community on Long Island. The home was remodeled in a Transitional style, bridging the gap from Traditional to Contemporary. The goal of the owners was to renovate the bedrooms & kitchen, and freshen up the vintage, dark-paneled home that lacked sunlight and closet space. Our solution was to infuse sunlight by changing door locations and circulation patterns so that every point had a window to the out… - [City Living](https://www.houzz.com/hznb/projects/city-living-pj-vj~1416665) - Location: New York, NY - Photos: 1 - Description: Modern kitchen with gray walls and lime green kitchen accents. Opened the wall of the former galley kitchen in this midtown Manhattan apartment to invite the kitchen into the living space, painting the walls gray with white trim, giving the room a sleek modern look. Project was an open plan, in a modern design, with bold lime green color. Location: Manhattan, New York Services: Interior Design, Interior Renovation, Kitchen Renovation Firm: Hierarchy Architects + Designers Architect: T.J Costello… [See all 29 projects](https://www.houzz.com/professionals/kitchen-and-bath-designers/hierarchy-architecture-design-pllc-pfvwus-pf~1166105825) ## Ideabooks - [Mantles](https://www.houzz.com/ideabooks/79713500/list/mantles) — 1 idea - [Rand](https://www.houzz.com/ideabooks/74524993/list/rand) — 1 idea - [A Pet Friendly Home](https://www.houzz.com/ideabooks/73084805/list/a-pet-friendly-home) — 2 ideas - [Hierarchy Bedrooms](https://www.houzz.com/ideabooks/51857038/list/hierarchy-bedrooms) — 7 ideas - [Hierarchy Living / Family Rooms](https://www.houzz.com/ideabooks/51856810/list/hierarchy-living-family-rooms) — 19 ideas - [Toby](https://www.houzz.com/ideabooks/70643219/list/toby) — 1 idea - [hierarchy's Ideas](https://www.houzz.com/ideabooks/70643195/list/hierarchy-s-ideas) — 1 idea - [Office](https://www.houzz.com/ideabooks/67798503/list/office) — 3 ideas - [Mud](https://www.houzz.com/ideabooks/67022006/list/mud) — 1 idea [See all 9 ideabooks](https://www.houzz.com/ideabooks/users/hierarchy) --- *Source: Houzz professional profile. Reflects the profile as of 2026-09-03.*