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The 25 Long Island design professionals below cover interior design, architecture, landscape design, and construction, from historic-house renovations and coastal retreats to ecological gardens and custom builds. They are the firms named in Architectural Digest’s February 11, 2026 directory, organized here by the kind of work you need rather than presented as a quality ranking.
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Use the profiles to make a sensible shortlist, then confirm each firm’s current availability, location, scope, fees, insurance, licensing where applicable, and recent references. The source is an editorial snapshot; it does not provide standardized prices, schedules, review scores, or a current capacity check.
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| Name | Best for | Key spec | Checked |
|---|---|---|---|
| A.A.Baker Design | Layered, collected interiors | Founded 2012; periods, antiques, vintage and bold accents | November 2026 |
| Allison Babcock Design | Coastal and historic homes | Adapts design to setting and history; works with local artisans | November 2026 |
| Aneta Rykiel Interiors | Projects across several metros | Founded 2013; Manhattan, Brooklyn, Long Island, White Plains, Florida and Chicago projects listed | November 2026 |
| Beth Donner Design | Residential, hospitality and construction coordination | Works in Manhattan, the Hamptons and Fire Island | November 2026 |
| Beril Khalaf Interior Design and Architecture | Multi-sector design | Residential, commercial, cultural and hospitality work; IDA honorable mention reported | November 2026 |
| Carter Design | Bicoastal, architecture-responsive interiors | Long Island and Los Angeles offices; led by Cy and Genevieve White Carter | November 2026 |
| Danielle Rose Design Co. | Eclectic updates to classic homes | Rockville Centre studio; handcrafted pieces balanced with function | November 2026 |
| DATE Interiors | Selective residential and commercial commissions | Founded 2019; “Design a Tiny Empire”; also corporate and Broadway work | November 2026 |
| Dawn Interiors | Comfortable, functional interiors | Natural materials and millwork; led by Dawn Ianno | November 2026 |
| Frampton Co. | Art-led interiors | Founded 2015; in-house art advisory and collectible contemporary art | November 2026 |
| Michael Vincent Design | Antique-modern mixes | Bellport studio founded 2019; Manhattan apartments and Long Island cottages | November 2026 |
| Mojo Stumer Associates | Integrated modern architecture and interiors | Founded 1980; texture and natural materials; more than 100 awards reported | November 2026 |
| Ram Design | Nature-connected, traditionally informed interiors | Principal Cristina Peffer; Parrish Art Museum design-business talk noted | November 2026 |
| Studio HP Designs | Family-friendly entertaining spaces | Led by Holly Pesahovsky | November 2026 |
| Sussan Lari Architect | Interior architecture and indoor-outdoor planning | Roslyn-based; licensed in the tristate area, according to the source | November 2026 |
| The 1818 Collective Interiors | Historical and contemporary balance | Associated with Kristin Fine and Analisse Taft-Gersten; East End shop sourcing resource | November 2026 |
| Winter McDermott Design | Architecture-to-decor continuity | Founded 2015; principal Maureen McDermott previously worked with Vicente Wolf | November 2026 |
| BMA Architects | Custom houses shaped around lifestyles | Hamptons studio founded 2001 by Blaze Makoid; light-filled indoor-outdoor plans | November 2026 |
| Koral Brothers Inc. | Design-build style custom construction | In-house engineers, architects, project managers and craftspeople | November 2026 |
| Catania Landscape Design | Crafted gardens for living and entertaining | Stonework, planting and construction team; many members reported with 16+ years | November 2026 |
| LaGuardia Design Group | Restoration and ecological landscapes | Emphasizes preservation, biodiversity and ecological health | November 2026 |
| Landscape Details | Residential landscapes rooted in place | East Hampton studio; estates through poolside cottages | November 2026 |
| Marshall Paetzel Landscape Architecture | Complex sites and broad outdoor programs | Native and indigenous plants; pools, sports courts, kitchen gardens and restoration | November 2026 |
| Quincy Hammond Landscape Architect | Formal gardens with a modern lens | Founded 2010; third-generation landscape architect | November 2026 |
| Mayfair Construction | Building with architectural variety | New York-based builder emphasizing detailed interiors | November 2026 |
How should you use this Long Island design directory?
Start with the work type, not a firm’s name. An interior designer is usually the relevant first call for furnishings, finishes, millwork and spatial character; an architect is the right lead for a new structure, additions or major changes to the building; a landscape architect or designer handles grading, planting and outdoor rooms; and a builder or general contractor turns an approved design into construction. Some practices cross those boundaries, but their contracts and professional responsibilities may still be different.
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Next, match the project’s setting and ambition. The profiles span Shingle-style and coastal houses, city apartments, historic properties, modern residences, estates, poolside cottages, gardens, sports courts and ecological restoration. A firm described as working in the Hamptons may not currently be taking a project in Nassau County, and a studio with work beyond Long Island may not offer every service in every market.
Which Long Island interior designer fits your project?
The interior-design group ranges from historically layered and art-led rooms to highly functional family spaces. The descriptions below explain the kind of brief each practice appears suited to; they are not independent ratings.
A.A.Baker Design
Asia Baker founded this Long Island firm in 2012 after working at Vogue and Roman and Williams Buildings and Interiors, according to the source. Its described language is organic and collected, combining periods, antiques, vintage pieces, rich hues and occasional bold details. A Cold Spring Harbor example uses custom and vintage upholstery, antique tables and a jute rug, making the studio a natural candidate for clients who want a home to feel layered rather than showroom-new.
Allison Babcock Design
This coastal-focused practice works on historic homes, vacation retreats and city dwellings. The profile emphasizes adapting the design to a home’s setting and history, incorporating client-selected art and antiques and collaborating with local artisans. That combination is especially relevant when a renovation must respect an existing structure while still feeling personal.
Aneta Rykiel Interiors
Founded in 2013, Aneta Rykiel Interiors lists projects in Manhattan, Brooklyn, Long Island, White Plains, Florida and Chicago. The geographic range may appeal to a client managing homes in more than one market, but confirm which locations and project types the studio currently accepts.
Beth Donner Design
Beth Donner Design works across private residences, corporate offices and boutique hotels. Its profile stresses hospitality thinking, construction coordination and relationships with contractors and trades, with client areas including Manhattan, the Hamptons and Fire Island. Architectural Digest reported that the firm’s Seven Beach Lane hotel in Westhampton Beach was expected to open in early summer 2026; that was a publication-time expectation, not confirmation of the property’s current status.
Beril Khalaf Interior Design and Architecture
Beril Khalaf is one of the practices listed in both the interior and architecture sections. The source describes residential, commercial, cultural and hospitality work and reports an International Design Awards honorable mention. If your project needs interior architecture as well as decoration, ask whether both scopes can be contracted and coordinated through the same team.
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This bicoastal firm has offices in Long Island and Los Angeles and is led by Cy Carter and Genevieve White Carter. Its projects are described as responding to each home’s architecture while combining periods and styles. It may suit clients who want a coherent concept across an existing architectural shell rather than a purely furniture-led refresh.
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Danielle Rose Design Co.
Rockville Centre-based Danielle Rose Design Co. is led by founder Danielle Chiprut. The profile calls its approach “elevated, eclectic,” with handcrafted pieces and a deliberate balance between aesthetics and function, including updates to classic homes. Ask for examples with a similar age, layout and level of construction intervention to yours.
DATE Interiors
Molly Torres Portnof founded DATE Interiors in 2019; the name stands for “Design a Tiny Empire.” The studio works on homes, corporate headquarters and a Broadway show dressing room and takes a limited number of projects at a time, according to the profile. That selective model makes current capacity a key question before you invest time in a proposal.
Dawn Interiors
Dawn Ianno leads this New York State design studio, which the source says reflects more than 15 years of industry experience. Its work emphasizes natural materials, millwork, comfort and function. It is a plausible fit for a brief that prioritizes durable, practical rooms without giving up a crafted architectural feel.
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Elena Frampton founded Frampton Co. in 2015 after two decades at New York interior-design firms, according to the source. The practice has an in-house art advisory team and focuses on collectible contemporary art. Clients who want art acquisition and interior decisions developed together should clarify how advisory, sourcing and installation are priced.
Michael Vincent Design
Michael Tomei founded this Bellport studio in 2019. Its described projects mix inherited or antique objects with modern furniture and art, ranging from Manhattan apartments to Long Island cottages. The approach is useful for families who want to retain meaningful pieces while updating circulation, lighting and everyday comfort.
Mojo Stumer Associates
Founded in New York in 1980, Mojo Stumer Associates is an interdisciplinary architecture and interior-design studio, so it appears in both categories. The source describes modern-lined homes enriched with texture and natural materials and reports more than 100 design awards, without listing or breaking down those awards in the available text. Treat the award count as the source’s historical claim, not as a comparable score.
Ram Design
Ram Design is associated with principal designer Cristina Peffer. The profile describes interiors connected to nature with traditional design notes and notes that Peffer has spoken at the Parrish Art Museum about the business of design. Request a portfolio that shows how the firm handles the balance between natural references and the formality your house requires.
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Studio HP Designs
Led by Holly Pesahovsky, Studio HP Designs is described as creating interiors that support family life as well as entertaining. This is a useful starting point for households that need robust daily circulation, storage and seating alongside rooms that can host guests.
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Sussan Lari Architect
Sussan Lari Architect, based in Roslyn, is listed under interiors and architecture. Architectural Digest describes the firm as licensed in the tristate area and active on residential projects in Manhattan and Long Island, offering interior architectural design and shaping interior details with an emphasis on indoor-outdoor flow. Confirm the specific license, jurisdiction and services that apply to your project before signing.
The 1818 Collective Interiors
The practice is associated with industry veterans Kristin Fine and Analisse Taft-Gersten. Its profile describes a balance of historical and contemporary design and mentions a similarly named East End shop as a sourcing resource. Ask whether sourcing through that shop is part of the design service or a separate retail transaction.
Winter McDermott Design
Founding principal Maureen McDermott worked alongside Vicente Wolf before opening Winter McDermott Design in 2015, according to the source. The firm emphasizes alignment between architecture and decor and high-quality craftsmanship. That focus can help when a renovation involves custom details that must read as part of the building rather than as add-on decoration.
Which architects and building firms should you consider?
For ground-up work, additions or major structural changes, clarify who is responsible for design documents, permitting coordination and construction administration. The source’s architecture entries include two firms that are not also listed in interiors, plus three interdisciplinary practices described above.
BMA Architects
Blaze Makoid founded this Hamptons studio in 2001. Its houses are designed around clients’ lifestyles, with light-filled interiors and continuity between indoors and outdoors. A consultation should establish whether the firm’s role would cover a full custom house, an addition, renovation or only a defined architectural phase.
Koral Brothers Inc.
Koral Brothers is described as a Hamptons-focused building firm with structural engineers, architects, project managers and craftspeople on staff. Its work ranges from contemporary beach houses to traditional country homes, and it also works in New York City and Aspen. The in-house mix may simplify coordination, but request a written breakdown of design, preconstruction and building responsibilities.
Mojo Stumer Associates, Beril Khalaf Interior Design and Architecture, and Sussan Lari Architect also appear in the architecture category. Their overlapping profiles are summarized above; the important practical question is whether the same engagement can cover architecture, interior architecture and decoration or whether separate agreements are required.
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Which Long Island landscape designers cover gardens, pools and restoration?
Landscape work is more than planting. Drainage, stonework, grading, ecological goals, maintenance and structures such as pools or sports courts can change the right consultant and the project budget, so describe the whole outdoor program at the first call.
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Catania Landscape Design
Catania is described as a team of craftsmen and horticulturists with expertise in stonework, planting and construction. The profile says many team members had been with the firm for more than 16 years at publication time and that its gardens support homeowners’ hobbies, hosting and relaxation. Ask how design, installation and ongoing maintenance are divided.
LaGuardia Design Group
LaGuardia’s stated approach extends beyond appearance to restoration, preservation, biodiversity and ecological health. It is a strong conceptual match for a property where habitat, water management or the recovery of an existing landscape matters as much as ornamental planting. Have the firm identify measurable ecological objectives in the proposal.
Landscape Details
This East Hampton studio designs residential landscapes in response to nature, history and homeowner preferences, from estates to poolside cottages. The range suggests it can address both large properties and more intimate outdoor rooms, but confirm the scale and construction services available for your site.
Marshall Paetzel Landscape Architecture
Led by Jonathan and Stacy Paetzel, this practice uses native and indigenous plants and works on challenging sites. Services described include kitchen gardens, sports courts, pools, environmental restoration and commercial or institutional landscapes. It is one of the more program-diverse options in the directory, so provide a complete list of desired outdoor uses rather than asking only for a planting plan.
Quincy Hammond Landscape Architect
Quincy Hammond founded the firm in 2010 and is described as a third-generation landscape architect who previously spent eight years at Hollander Design. The practice specializes in formal gardens interpreted through a modern, minimalist lens and works on estates on Long Island and beyond. Confirm how a formal-garden concept would be adapted to your property’s existing vegetation, maintenance capacity and architecture.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Where does Mayfair Construction fit?
Mayfair Construction is the directory’s builder and subcontractor entry. The New York-based company is described as emphasizing architectural variety and detailed interiors. If you are already working with an architect or designer, ask Mayfair to price the drawings you have rather than assuming the builder’s scope includes design development.
How were these 25 names selected?
This is an editorial directory based on Architectural Digest’s February 11, 2026 article, not a standardized ranking. The selection reflects the source’s four categories, the project types and design approaches described in each profile, and the firms’ stated Long Island or broader regional reach. The source does not provide uniform prices, schedules, current availability, comparable client-review scores or a common method for measuring quality, so the order here follows work type and the source’s grouping rather than a first-to-last verdict.
How do you turn this list into a practical shortlist?
- Write a one-page brief. Include the property location, whether it is new construction or existing, rooms or outdoor areas involved, desired changes, any historic constraints, household needs, target timing and a realistic budget range.
- Choose the lead discipline. Select an interior designer for finishes and furnishings, an architect for building changes, a landscape professional for site and planting work, or a builder when design documents are already in hand. For interdisciplinary firms, state which responsibilities you expect them to own.
- Shortlist by evidence of fit. Look for projects with a similar setting, scale, age, construction complexity and aesthetic direction. A coastal cottage, Manhattan apartment, formal estate and ecological restoration demand different experience even when all are labeled “residential.”
- Verify current facts directly. Ask whether the firm is accepting work in your geography, who would lead the project, which services are in-house, and whether the leadership, office locations and project examples described in the 2026 article remain accurate.
- Request comparable proposals. Ask each finalist to separate design phases, procurement, site visits, construction administration, travel, consultant costs, markups and reimbursable expenses. Without that breakdown, fee totals that look similar may cover very different work.
- Check the agreement before work begins. Confirm payment schedule, ownership or licensing of drawings, change-order procedures, purchasing responsibilities, cancellation terms, insurance and the process for resolving defects or delays. For architecture and construction, verify the credentials and permits required in the project’s jurisdiction.
What does the source not establish?
The directory does not establish that every listed practice is currently available, that a named person still holds the same role, or that every described service is offered to every client. It also does not publish comparable fees, project durations, current opening dates, independent rankings or client-satisfaction data. Those are the questions to settle in your initial calls and written proposals, not assumptions to make from a directory listing.
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Frequently asked questions
How current is this Long Island designer list?
The underlying article was published February 11, 2026, and this guide labels its comparison table “Checked November 2026” for the assignment’s reference date. That date does not mean each firm’s capacity, leadership, office or services were independently reverified, so contact the practice before relying on any profile.
What should I send a designer before asking for a proposal?
Send the property address or town, approximate size, photos or plans, a short scope, the people who use the space, target milestones and a budget range. Include non-negotiables such as preserving antiques, meeting accessibility needs, protecting mature trees or coordinating with an existing architect.
Can one firm handle both architecture and interior design?
Some entries are explicitly listed in both categories, including Beril Khalaf Interior Design and Architecture, Mojo Stumer Associates and Sussan Lari Architect. Even then, ask for a written scope showing where architectural services end, where interior architecture or decoration begins, and which outside consultants or contractors remain your responsibility.
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How should I compare landscape proposals?
Compare the site assumptions as well as the plant list: survey and grading requirements, drainage, irrigation, hardscape, pool or court coordination, restoration goals, installation and maintenance. Ask each finalist to identify which items are included now, which are allowances, and which would be designed or priced in a later phase.
Frequently Asked Questions
How current is this Long Island designer list?
The underlying article was published February 11, 2026, and this guide labels its comparison table “Checked November 2026” for the assignment’s reference date. That date does not mean each firm’s capacity, leadership, office or services were independently reverified, so contact the practice before relying on any profile.
What should I send a designer before asking for a proposal?
Send the property address or town, approximate size, photos or plans, a short scope, the people who use the space, target milestones and a budget range. Include non-negotiables such as preserving antiques, meeting accessibility needs, protecting mature trees or coordinating with an existing architect.
Can one firm handle both architecture and interior design?
Some entries are explicitly listed in both categories, including Beril Khalaf Interior Design and Architecture, Mojo Stumer Associates and Sussan Lari Architect. Even then, ask for a written scope showing where architectural services end, where interior architecture or decoration begins, and which outside consultants or contractors remain your responsibility.
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Compare the site assumptions as well as the plant list: survey and grading requirements, drainage, irrigation, hardscape, pool or court coordination, restoration goals, installation and maintenance. Ask each finalist to identify which items are included now, which are allowances, and which would be designed or priced in a later phase.

