As proprietor of a renovated historic home in Southampton Village, I am happy to confirm that Mr. Ernest Schieferstein is a remarkable Professional in the Architectural field who has managed to complete all our requirements in a tough architectural review board district.
- Francisco D'Agostino

The team of architects and designers at Ernest Schieferstein Architecture in Sag Harbor, NY is committed to excellence. We have built our reputation one client at a time, developing strong and meaningful relationships through the successful completion of commercial and residential projects. We enjoy collaborating with our team and with our clients, sharing ideas that will propel each project to completion through solid workmanship and quality design. Our extensive menu of services ranges from design to construction documents to project management and more.

Since Ernest Schieferstein Architecture was first founded in 1982, our firm has grown steadily. From our original architecture firm, our base has expanded to include both interior and landscape design services. In 1998, we also added a construction component to our firm, making it one of the handful of full service design firms in our area.

Our team takes an individual approach to every project, whether it contains special design elements or it is considered traditional or modern. In our design portfolio, clients find evidence of our history of tackling design challenges that are as varied as our clients. Living within the community in which we work, our team is also strongly committed to the use of sustainable materials.

Ernest Schieferstein, R.A.

Ernest Schieferstein, R.A. graduated from Syracuse University, earning his Bachelor's degree in Architecture in 1976. His career began shortly thereafter in the Sag Harbor firm of E.L. Futerman Associates.

Michael Mensch

Michael Mensch, our Senior Project Manager, completed his education at Carnegie Mellon School of Architecture and Pratt Institute, earning his Bachelor's degree in Industrial Design in 1982.

The collaboration in architectural design between Ernest and Michael began more than twenty years ago. Since that time, the two, along with their team, have created a collection of widely diverse architecture throughout the east end.

Call (631) 458-0464 to learn more or to view our extensive project portfolio.

Our design services include:


  • Design & Master Planning
  • Site Selection Consultation
  • Pre Planning & Planning Negotiations
  • Project Estimating & Cost Control
  • Building Regulation Evaluation
  • Complete Design Services through Working Drawings, Project Management, Lighting Design, and Graphic Design.


  • Space Planning
  • Furniture Design and Layout
  • Kitchen & Bath Design
  • Electrical Plans
  • Window Treatments
  • Staging


  • Site Planning & Concept Design
  • Full Landscape Design
  • Garden Structure & Pergola Design
  • Residential Garden Design
  • Environmental, Revegetation Consultation Site, Responsive Planting Design, Construction, Documentation & Observation

Related Articles