The 1900s sees rapid development in technology. Automobiles go into mass production, the Wright Brothers make their first flight at Kitty Hawk, and radio broadcasting takes to the airwaves. In 1902, Willis Carrier develops air-conditioning for the workplace and later patents the equipment allowing design to better control temperature, humidity and ventilation. In 1906, the Illuminating Engineering Society of North America (IES) is founded.

The Great Baltimore Fire also ravages the central portion of the city, destroying over 1,500 buildings, and requiring a major reconstruction effort. It spurs improved fire protection codes and standards and leads to the establishment of the Engineer’s Club in 1905.

Henry Adams completes the Belvedere Hotel in 1903, the Equitable Building in 1906, and the Maryland Institute for Arts in 1908. The Belvedere becomes the premiere hotel in Baltimore hosting U.S. Presidents and celebrities. The new home for the Maryland Institute for Arts is awarded a gold key by the New York Association of Independent Architects, the highest award in architecture at the time. The firm also completes projects in China and Manila.