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Hierarchy Architecture + Design, PLLC

Kitchen & Bath Designers

About Us

Nassau County's Premier Architecture & Kitchen and Bath Design Firm
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 30 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 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 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

Bathroom Design, Custom Cabinet Doors, Custom Cabinets, Custom Kitchen Cabinets, Custom Pantries, Custom Walk-in Closets, Floor Plans, Green Building, Handicap-Accessible Design, Home Additions, Home Extensions, Kitchen Design, Mudroom Design, Outdoor Kitchen Design, Project Management, Sustainable Design, Bathroom Remodeling, Kitchen Remodeling

Areas Served

Garden City, Glen Cove, Lake Success, Laurel Hollow, Manhasset Hills, Mineola, Munsey Park, North Hills, North Merrick, Oyster Bay Cove, Plandome, Plandome Manor, Rockville Centre, Sands Point, Syosset, Valley Stream, Kings Point, Jericho, Muttontown, New Hyde Park, Baxter Estates, Oyster Bay, Port Washington, Flower Hill, Manhasset


Best of Houzz 2014, 2015, 2017, 2018, CKD - Certified Kitchen Designer RA - Registered Architect AIA Member - American Institute of Architects NKBA Member- National Kitchen & Bath Association BBB Member - Better Business Bureau

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Contact Hierarchy Architecture + Design, PLLC
Hierarchy Architecture + Design, PLLC
Average rating: 5 out of 5 stars
7 Gaynor Avenue
Manhasset, NY 11030
Typical Job Cost $200,000 - 4,000,000
Renovation: $200K - $900k New Home: $900K - $4M