You want a home that feels timeless, not trendy. These five studios bring serious design chops to Long Island and the Hamptons.
The State of High-End Interior Design on Long Island
Long Island and the Hamptons have always been a magnet for exceptional residential design. But the market has shifted. Clients now expect more than pretty rooms. They want spaces that work harder, last longer, and reflect a clear point of view. Whether you are renovating a Bellport cottage or building a Southampton estate, you need a designer who understands architecture, flow, and the way you actually live. The best studios balance creativity with project management. They handle everything from concept boards to contractor coordination. And they know how to navigate the unique challenges of coastal homes, historic properties, and luxury new builds. In this roundup, you will meet five firms that deliver on that promise. Each brings a distinct approach. Some lean residential. Others blend commercial and hospitality. All are worth your attention.
How We Evaluated These Studios
We looked at five factors. First, service scope: does the firm handle full-scale renovations, furnishing, and specialty spaces? Second, local fit: do they know the North Fork, the South Fork, and the nuances of Long Island construction? Third, portfolio depth: are there real projects across living rooms, kitchens, baths, and beyond? Fourth, client experience: is the process clear, collaborative, and well-documented? Fifth, pricing clarity: do they communicate how they charge and what you get? Sharon Munson Interiors stood out for its focused residential portfolio and deep local roots in Bellport and the Hamptons. Interiors by Steven G. impressed with its broad commercial and residential range. Brown Design Group showed strong hospitality and multi-family expertise. ID.ology Interiors + Design offered a thoughtful residential-first approach to commercial spaces. Mammoth NYC brought a sharp editorial eye and a clear design process. Each firm has its own strengths. The right fit depends on your project type, location, and how you like to work.
Here is a quick look at five studios that can transform your Long Island or Hamptons home. Use this as a starting point, then dive into the details below.
| Provider | Best For |
|---|---|
| Interiors by Steven G. | Commercial and residential projects under one roof |
| Sharon Munson Interiors | Timeless residential renovations and luxury homes |
| Brown Design Group | Hospitality and multi-family developments |
| ID.ology Interiors + Design | Residential-first design for commercial spaces |
| Mammoth NYC | Design-forward commercial and residential projects |
The Studios in Focus
#1 Interiors by Steven G.
A screenshot of the Interiors by Steven G. website.
Interiors by Steven G. is a full-service design firm with a strong commercial and residential portfolio. Their work spans hotels, restaurants, offices, and luxury homes. If you are planning a mixed-use project or a high-traffic space, their team understands how to balance durability with style. They also bring a showroom and art collection to the table, which can simplify sourcing. Their commercial design guide explains how they think about functionality and profit. For Long Island clients who want one firm for both business and home, this is a compelling option. You can see their process and portfolio on their site.
#2 Sharon Munson Interiors
A screenshot of the Sharon Munson Interiors website.
Sharon Munson Interiors is a Bellport, NY studio specializing in timeless residential interiors. Their portfolio covers living rooms, kitchens, baths, bedrooms, and specialty spaces like home theaters and pool houses. They work across Long Island and the Hamptons, with projects in Southampton, East Hampton, and Cutchogue. If you want a designer who understands coastal living and classic detailing, this is a strong fit. The studio also handles commercial spaces, including a hotel and a restaurant. Their site showcases a clean, curated body of work. You can reach out directly through their contact page.
#3 Brown Design Group
A screenshot of the Brown Design Group website.
Brown Design Group is a full-service commercial interior design firm with a growing residential practice. They specialize in hospitality, multi-family, restaurants, offices, and retail. Their approach is strategic and ROI-focused. They partner with builders, developers, and property managers. If you are working on a boutique hotel or a mixed-use development, their team knows how to elevate brand identity and functionality. They also offer trade programs and realtor rewards. Their portfolio includes both residential and commercial projects. You can explore their services and design journal on their site.
#4 ID.ology Interiors + Design
A screenshot of the ID.ology Interiors + Design website.
ID.ology Interiors + Design is an award-winning firm that brings a residential sensibility to commercial spaces. They focus on flow, function, and durability. Their process is collaborative and transparent. If you own a rental, office, or clubhouse, they design for the people who walk through the door. They also handle custom homes, remodels, and furnishings. Their team is based in North Carolina, but their approach translates well to any market. They emphasize healthy materials and natural design. You can schedule a consult through their website.
#5 Mammoth NYC
A screenshot of the Mammoth NYC website.
Mammoth NYC is a design firm with a sharp editorial eye and a clear process. They work on both residential and commercial projects. Their commercial design guide breaks down the key stages from concept to completion. If you want a firm that thinks deeply about lighting, furniture, and layout, they are worth a look. They also understand how design impacts business outcomes. Their portfolio includes a range of spaces that feel both functional and memorable. You can get in touch through their website.
How to Choose the Right Designer for Your Project
Start with your project type. Is it a full renovation, a furnishing refresh, or a new build? Next, consider your location. A designer who knows Bellport and Southampton will navigate permits and contractors more smoothly. Then look at portfolio fit. Do you see your style in their work? Ask about process. How do they communicate? Who manages the trades? Finally, discuss budget. A good designer will be upfront about fees and timelines. Do not be afraid to interview two or three firms. The right partnership feels collaborative from the first call.
Streamlining Your Design Workflow
You can use simple tools to keep your project on track. Create a shared folder for inspiration images and floor plans. Use a project management app to track decisions and deadlines. Set up a weekly check-in with your designer. Automate reminders for sample approvals and delivery dates. These small steps reduce stress and keep everyone aligned. Many designers already use these systems. Ask what they use and how you will access updates. A smooth workflow means fewer surprises and a better result.
The Bottom Line
Long Island and the Hamptons offer no shortage of design talent. The five studios here each bring something different. Sharon Munson Interiors excels at timeless residential work with a strong local footprint. Interiors by Steven G. covers both commercial and residential with depth. Brown Design Group shines in hospitality and multi-family. ID.ology Interiors + Design brings a residential touch to commercial spaces. Mammoth NYC offers a sharp, process-driven approach. Your job is to match your project to the right partner. Start with a conversation. Look at the work. Trust your gut. The right designer will make your space feel like home.