Luxury • Full-Service

Interior Design Firm

Luxury Homes • Estates

North Shore & the Hamptons

Nassau & Suffolk County

Award-Winning
Interior Design

Renovation • Remodeling

Home Renovation Design

New Builds • New Purchases

Interior Design for
New Construction

Kitchens • Baths • Whole-Home

Sophisticated Spaces
You'll Love to Live In

Nassau & Suffolk County • Full-Service Luxury Interior Design Firm

For over 25 years, Interiors by Just Design has been a leading luxury interior design firm on Long Island, NY. Led by designer Robyn Baumgarten, the studio offers full-service interior design for estate homes, new construction, and major renovations throughout Nassau and Suffolk County. Every project is handled end to end, from space planning and concept through procurement and final installation.
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What We Do

Interior Design Services

Residential Design

Full-service interior design for luxury homes, from first concept to final detail.

Home Renovation Design

Renovation design for kitchens, bathrooms, and whole-home remodels that balance beauty and function.

New Construction Interior Design

Complete interior planning and space design for new home construction and newly purchased properties.

Design & Build

A single contract for design and construction, with one accountable team managing the entire build.

Commercial Interior Design

Office and commercial spaces designed to reflect your brand and elevate how people experience it.

Kitchen & Bath Design

Expert design for the rooms you use most, engineered for function and finished for impact.

Explore All Services
Old Westbury new home living room interior design Long Island
New primary bedroom deisgn in Manhasset home
Entryway design by Robyn Baumgarten
Our Work

Featured Projects

A look at how we reimagine Long Island's most distinctive homes — from black-and-white sitting rooms to timeless estate interiors.

A Ground-Up Interior in an Old Westbury EstateOld Westbury, NYA Ground-Up Interior in an Old Westbury EstateView Project →
A Black-and-White Sitting Room in a Dix Hills RanchDix Hills, NYA Black-and-White Sitting Room in a Dix Hills RanchView Project → A Timeless Design in an Old Brookville EstateOld Brookville, NY (Valentine Lane)A Timeless Design in an Old Brookville EstateView Project →
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Nassau & Suffolk County • Long Island

Start Your Interior Design Project

Whether you are building a new home, renovating an existing one, or reimagining a single room, Interiors by Just Design brings 25 years of luxury design experience to every project across Nassau and Suffolk County.

Book Consultation Call: 516-470-0861

Client Stories

Client Reviews

Robyn transformed our entire home into something we didn't even know we wanted. Every room is perfect. We receive compliments constantly.

— Old Westbury, NY

Working with Robyn was an absolute pleasure from start to finish. She listened to everything we wanted and delivered beyond our expectations.

— Manhasset, NY

Our kitchen renovation is stunning. Robyn's attention to detail and her vision for how everything should flow together made all the difference.

— Woodbury, NY

I never thought interior design could make such a difference in how I feel every single day. Robyn made our house finally feel like our dream home.

— Syosset, NY

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As Seen In

Press features - House, Distinction, Woodbury, Fashion Manuscript, and Newsday logos

Long Island Press

Robyn is listed as one of the Top 15 Interior Designers on Long Island according to Long Island Press

“Modern, Minimal, Traditional, Transitional, Midcentury — Baumgarten is a seasoned interior designer with more than two decades under her belt. She was previously rated one of the top 100 interior designers in New York.”

— Long Island Press

25+ Years Experience   ·   150+ Manufacturer Partners   ·   Full-Service Design Firm