1990 W.C. Vaughan begins collaboration with E.R. Butler & Co. to standardize Vaughan design series.
Scripps Neurosciences Research Institute San Diego, CA 1992–1995 Tod Williams Billie Tsien, Architects E.R. Butler & Co., Manufacturer
1993 E.R. Butler & Co. receives award form the American Institute of Architects (San Diego Chapter) for the Neurosciences Institute at the Scripps Research Institute, “in recognition of the outstanding contribution in design.”
Central Synagogue New York, NY Restoration, 1998–2001 Henry Fernbach, Architect E.R. Butler & Co., Manufacturer
Tweed Courthouse New York, NY Restoration, 1999–2001 John Kellum, Architect, 1861 Leopold Eidlitz, Architect (Alteration), 1871 John G. Waite Associates, Architects E.R. Butler & Co., Manufacturer
Hermès International S.A. (Flagship) New York, NY Restoration, 1999–2007 McKim, Mead & White, Architects, 1927 Beyer, Blinder, Belle, Architects E.R. Butler & Co., Manufacturer
2003 E.R. Butler purchases the Prince Street Works, the historical Tiffany silver department, at 55 Prince Street, NYC.
Harrison Gray Otis House II Boston, MA Restoration, 2011 Charles Bulfinch, Architect, 1802 E.R. Butler & Co., Manufacturer
2012 May 7: Rhett Butler, of E.R. Butler & Co., receives the Arthur Ross Award for Artisanship from the Institute for Classical Architecture & Art.
Astor Beechwood Mansion Newport, RI Restoration, 2016 Downing & Vaux, Architects, 1852 Richard Morris Hunt, Architect (Alteration), 1881 McKim, Mead & White, Architects (Alteration), 1901 John Grosvenor, Architect E.R. Butler & Co., Manufacturer