[8] The building features a sandstone facade, originally intended to extend only six feet above street level.

[10] Delivery of one block of stone from quarries at Table Rock weighing 14,000 pounds required a team of eight horses.

[11][12] In 1904 Tourtellotte & Co. began constructing a 4th floor of the building, and the architects supervised an interior renovation and installed an elevator.

[14] When completed, the new top floor was designed further by architects Wayland & Fennell to accommodate the Boise Commercial Club.

Plans for the new building were drawn 18 months prior to construction in 1891, and the delay may have reflected concern at the bank that Idaho would not remain a state but revert to its pre-1890 status as a territory.

King became the architect amid concern that Boise City did not have resources to construct the Chicago design.