The third floor, also known as the legislative floor, contains the chambers for both the House and Senate, along with the Supreme Court.
When the building was first completed the north-east corner of this floor contained the library, which has since been relocated, and the area divided into smaller offices.
 At the end of the west atrium area is the entrance to the House of Representatives.
The House is composed of 75 members, who serve two-year terms, and represent approximately 40,000 citizens each.
During the restoration the House chamber was restored to the original paint colors and period carpets.
Two 103 in (260 cm) plasma display screens were installed at the front of the chamber for voting processes and presentations, a first of its kind system in a state capitol.
New desks were created, based on the originals, but now allow room for modern technology such as printers and computers.
The ceiling of the chamber is a large skylight, allowing natural light to illuminate the room.
The chamber also features four murals painted on the rounded ceiling coves, two of which (east and west) are original to the buildings, while the other two were painted during the renovation.
The east mural, entitled The Dream of Brigham Young was painted by New York artist, Vincent Aderente, and shows Young standing near the Salt Lake Temple and holding their blueprints.
The east mural, entitled Discovery of the Great Salt Lake, shows Brigham Young conversing with Jim Bridger about the Great Salt Lake, and is the work of A. E. Foringer.
The north mural features Utah resident, Seraph Young, voting in Utah's first election following the granting of women's suffrage in the territory.
The south mural features the Engen brothers building their first Ski jump, representing the importance of outdoor recreation to the economy of Utah.
The House Lounge, located directly behind the chamber, was restored to its original size and configuration, and furnished with period carpets and furniture.

The Senate chamber, which houses the Utah State Senate, is located in the northern part of the center wing.
The Senate is composed of 29 members, who serve for terms of four-years.
Senators sit facing north, towards the speaker.
The chamber was expanded during the renovation, removing the walls on each side, opening what were hallways to the floor of the chamber.
Like the House's chamber, the Senate Chamber was restored with original paint colors and period furniture.
Included within the chamber are three murals, the first is original to the building, and was painted across the entire, upper-part, of the front wall.
The mural, known as a polyptych, is a landscape by A.B. Wright and Lee Greene Richards showing Utah Lake, located a 45-minute drive south of the capitol, in Utah County.
During the restoration, two new paintings, by Logan artist Keith Bond were painted.
The eastern mural, entitled Orchards along the Foothills, shows the Wasatch Mountains of Northern Utah.
The western mural, entitled Ancestral Home shows an Anasazi ruin amongst the red-rock hills of Southern Utah.

The Supreme Court chamber is located at the far east end of building.
The chamber is currently only used for ceremonial purposes as the Utah Supreme Court relocated to the Scott M. Matheson Courthouse in downtown Salt Lake City in 1998.
The third floor, also known as the legislative floor, contains the chambers for both the House and Senate, along with the Supreme Court. When the building was first completed the north-east corner of this floor contained the library, which has since been relocated, and the area divided into smaller offices.  At the end of the west atrium area is the entrance to the House of Representatives. The House is composed of 75 members, who serve two-year terms, and represent approximately 40,000 citizens each. During the restoration the House chamber was restored to the original paint colors and period carpets. Two 103 in (260 cm) plasma display screens were installed at the front of the chamber for voting processes and presentations, a first of its kind system in a state capitol. New desks were created, based on the originals, but now allow room for modern technology such as printers and computers. The ceiling of the chamber is a large skylight, allowing natural light to illuminate the room. The chamber also features four murals painted on the rounded ceiling coves, two of which (east and west) are original to the buildings, while the other two were painted during the renovation. The east mural, entitled The Dream of Brigham Young was painted by New York artist, Vincent Aderente, and shows Young standing near the Salt Lake Temple and holding their blueprints. The east mural, entitled Discovery of the Great Salt Lake, shows Brigham Young conversing with Jim Bridger about the Great Salt Lake, and is the work of A. E. Foringer. The north mural features Utah resident, Seraph Young, voting in Utah's first election following the granting of women's suffrage in the territory. The south mural features the Engen brothers building their first Ski jump, representing the importance of outdoor recreation to the economy of Utah. The House Lounge, located directly behind the chamber, was restored to its original size and configuration, and furnished with period carpets and furniture.
The Senate chamber, which houses the Utah State Senate, is located in the northern part of the center wing. The Senate is composed of 29 members, who serve for terms of four-years. Senators sit facing north, towards the speaker. The chamber was expanded during the renovation, removing the walls on each side, opening what were hallways to the floor of the chamber. Like the House's chamber, the Senate Chamber was restored with original paint colors and period furniture. Included within the chamber are three murals, the first is original to the building, and was painted across the entire, upper-part, of the front wall. The mural, known as a polyptych, is a landscape by A.B. Wright and Lee Greene Richards showing Utah Lake, located a 45-minute drive south of the capitol, in Utah County. During the restoration, two new paintings, by Logan artist Keith Bond were painted. The eastern mural, entitled Orchards along the Foothills, shows the Wasatch Mountains of Northern Utah. The western mural, entitled Ancestral Home shows an Anasazi ruin amongst the red-rock hills of Southern Utah.
The Supreme Court chamber is located at the far east end of building. The chamber is currently only used for ceremonial purposes as the Utah Supreme Court relocated to the Scott M. Matheson Courthouse in downtown Salt Lake City in 1998.
Utah State Capitol