This one-story brick building is the final addition to the Nebraska Boiler Company that started its operations at the corner of 9th & Q Streets. As the business grew, additions were added to the original site by extending the roof and adding new walls. The Nebraska Boiler Building/Garage was built to handle the manufacture of boilers and had an assembly line operation complete with an industrial ceiling hoist. As boilers were assembled, the product would move along the hoist. The final stage included testing in the corner room. Boilers were then loaded and transported to the ultimate user.

Today, the Nebraska Boiler Building serves an integral role as a parking facility. Daytime parking is for owners and employees in Haymarket. During evenings and weekends, the general public can park in the Nebraska Boiler Building. A coin box is located on the wall adjacent to the south entrance for parking payment.

Two unique features have been pioneered in the Nebraska Boiler Building, which is located on the block bordered by P, Q, 8th and 9th Streets. First, to enter, one must enter the alley running between 8th and 9th Streets. Despite this "hidden" entrance, patrons are pleased to find covered parking immediately across from the Haymarket Square Courtyard.

Second, the concept of "tandem" parking was pioneered in the Nebraska Boiler Building. Because of the long parking stalls, monthly parking is assigned to two vehicles which park in "tandem", thereby doubling the capacity of the Garage.