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01 about

The Garrigan Design Group is an interior design firm with specialties in residential, education, and hospitality design.

Our goal is to listen, observe, and learn about our clients and identify what works best for them in their projects. With the use of colors, fabric, furniture, accessories and finishes we are able to reflect our clients' wants in any style. Our designs are not limited to one look or style, creating beautiful yet functional designs for clients.

Giana Castelli, principal & lead designer, is an interior designer based in New York & New Jersey. She graduated at the top of her class with a Bachelor of Science from Philadelphia University in 2018. Giana specializes in education and commercial interiors and is currently working on projects in the New York / New Jersey tri-state area.

Giana has specialized in the K-12 education, independent school, and hospitality design sector since 2017, designing dozens of libraries, maker spaces, classrooms, restaurants, and specialty spaces for clients. While living in Philadelphia, she worked specifically on restaurant, bar, and other hospitality and residential interior design. Giana approaches interior design from both a programmatic and functional need as well as an aesthetically pleasing need. She is proficient in drafting, digital rendering and 3D visualization, FF&E specifications, and ultimately presenting complete interior design packages, concepts, and plans.

With the belief that everything she does has a purpose, Giana approaches interior design with the intention that should not only be aesthetically pleasing, but should be functional and effective for her clients as well. Her designs evoke emotion-whether from the texture of the fabric chosen, a piece of furniture that sparks conversation and interest, or the custom-built furniture or millwork that organize a space. She is nimble in how she approaches every project, realizing that there are many possible avenues to take to achieve the desired results. Giana has an organized but laidback approach to her work and makes clients feel like friends while simultaneously creating trusting relationships and beautiful spaces.

When she's not working, she spends time with her husband, John, and their two-year-old son, Jack. Together they spend lots of time at the beach and the outdoors, trying new foods, and antiquing.



02 services

The Garrigan Design Group can tackle any project, big or small.

We do not limit our clients to a certain budget or design sector. As a group, we are capable of working of working on both commercial and residential projects.


The Garrigan Design Group focuses three design sectors.

  1. Hospitality - Restaurant, Bar, & Public Spaces

  2. Education - K-12, Independent & Private Schools

  3. Residential - Single Family and Multi-Family Dwellings

Each project needs specific roles filled by the Garrigan Design Group.

We offer the following services but are not limited to:

  • Interior Design & Styling

  • Branding Design

  • Custom Millwork Design & Procurement

  • FF&E (Furniture, Fixtures, & Equipment) Procurement

  • Exterior & Landscape Design Assistance


03 work samples


04 contact

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Tel: 347-276-4685

New York / New Jersey / Pennsylvania / Connecticut

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