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231 East 22nd Street, Suite 23 New York NY 10010

Fax: +88 (0) 202 0000 001
Central Pres Church Bell Tower


Walter B. Melvin Architects, LLC has provided expert architectural restoration services since 1975. A leader in the field of historic preservation, we employ traditional building methods as well as many new restoration techniques we have developed over the years to become industry standards. We have a deep appreciation for the detail and craftsmanship of historic buildings, a strong commitment to the preservation of historic material, and the high professional standards required to achieve clearly specified, first-class work.

With more than 45 years of experience, WBMA’s portfolio includes the successful restoration of hundreds of structures in the New York City area, including some of the city’s most iconic landmarks. Our areas of expertise include:

  • Masonry repair, restoration and reconstruction (stone, terra cotta, brick, concrete)
  • Cast iron repair and refabrication
  • Window and door restoration and replacement (wood, metal, stained glass)
  • Roofing and terrace replacement (membrane, sheet metal, slate shingle, terra cotta tile)
  • Interior finish restoration and replication

Specific services offered include:

  • Building Surveys, Existing Conditions Reports and Master Plans
  • Facade Inspection Safety Program (FISP, formerly known as Local Law 11) Reports
  • Construction Documents (Drawings, Specifications) and Administration
  • Leak Investigations
  • Professional Consultation, Expert Opinions and Peer Reviews
  • Landmarks Preservation Commission Presentations

Working with both the public and private sectors, WBMA’s clients include institutions, government agencies, businesses, and residents. Our project teams work closely with our clients, emphasizing open communication and establishing direct rapport. We look beyond the architectural and construction concerns for each project, considering financial planning equally important. Well-preserved buildings must be both financially and structurally sound.

Sergio De Orbeta


Sergio De Orbeta

With over 19 years of experience in the field, Sergio has been instrumental in the successful restoration, repair, and continued maintenance of numerous historic structures in New York City and beyond.  13 of those years have been at WBMA, where he has taken a detailed and methodical approach to his projects. Some of his noteworthy ongoing projects include Casa Italiana, Columbia University; The Osborne; 100 Hudson Street; 525 Park Avenue; 130 East End Avenue; and 300 West 108th Street.  Previous award-winning projects include 131 Duane Steet – the Hope Building, 451 Broome Street, Donald Judd Home & Studio, and Marymount School of New York.  He is a Registered Architect in the States of New York and New Jersey. Originally from Puerto Rico, Sergio received his Master of Science in Historic Preservation from the University of Pennsylvania and Bachelor of Architecture with a Minor in Architectural History from Carnegie Mellon University.



University of Pennsylvania, Philadelphia, PA
Master of Science in Historic Preservation

Carnegie Mellon University, Pittsburgh, PA
Bachelor of Architecture
Minor in Architectural History

Professional Registration

Registered Architect in the States of New York and New Jersey

Martin Lee Griggs, RA

Martin Lee Griggs

Martin has worked in the architecture and construction industry for over 30 years, including 26 years at WBMA specializing in the assessment and repair of exterior envelopes. He has overseen several award-winning restoration projects including St. Paul’s Chapel – Columbia University, 451 Broome Street, Liberty Tower and Alwyn Court, as well as restoration projects at Louis Sullivan’s Bayard-Condict Building, the Cosmopolitan Club, several City parks and residential cooperatives. Martin is well versed in the myriad building materials that have been used in the northeast and has extensive experience assessing and restoring a variety of masonry and roofing systems. He is a graduate of the University of Southern California and is a Registered Architect in New York State.

University of Southern California, Los Angeles, CA
Bachelor of Architecture

Professional Registration
Registered Architect in the State of New York

Robert C. Bates


Robert C. Bates

With 35 years of professional experience at WBMA, Robert has overseen restoration projects at many of New York City’s premier institutions, including The Met Cloisters, Donald Judd Home and Studio, Green-Wood Cemetery and Riverside Church, as well as McKim Mead and White’s 998 Fifth Avenue and William Tuthill’s Schinasi Mansion at 351 Riverside Drive. A graduate of Lehigh University, Robert is a Registered Architect in the States of New York, New Jersey and Connecticut, as well as a member of the American Institute of Architects. He has a strong understanding of traditional building materials and has developed many new restoration techniques over the years. Robert has published articles on waterproofing of historic masonry walls, restoration of cast iron, and roofing replacement.



Lehigh University, Bethlehem, PA
Bachelor of Art in Architecture

Professional Registration

Registered Architect in the States of New York, New Jersey and Connecticut