In 1898 the Commissariat Store was renamed the Government Store to reflect the Federation movement.
By 1911 an additional storey was designed by Leonard Kempster, an architect for the Department of Public Works, in order to increase accommodation and provide access to William Street.
Contractor, William Kitchen oversaw the construction of the new addition, which was completed in 1913.
An electrical lift was then installed in 1914, operating between the three storeys.

The Queensland Government created the State Stores Board in Queensland on 23 March 1923, which would purchase and distribute all goods required by all government departments.
The inaugural meeting of the State Stores Board was then held on 29 March 1923 at the Government Store.
It was renamed the State Stores Building, and eventually vacated by them on 12 September 1960.

The Building resumed providing accommodation for other overcrowded government departments, such as the Stock and Water Supplies Branch of the State Irrigation and Water Supply Commission until 1962, and the State Archives until 1968.
The Firms Branch, Department of Justice, and Department of Stores shared the second floor.
While the State Library and Law Reform Commission also occupied the building temporarily, all vacating the building by 1976.

In time, and as the city developed, the river location became less convenient.
By 1907 it was deemed by the storekeeper to be too far from the steamer wharf and railway station.
In 1911 he suggested that if relocation was not possible, the addition of a lightweight upper storey with access to William Street would be helpful, providing increased floor space and improving lighting and summer cooling conditions.
This suggestion was adopted and the work was commenced by contractor William Kitchen at a cost of £2194 pounds in late 1912.

The new storey was constructed of rendered brick in a Georgian Revival style sympathetic to the existing building.
To keep costs down, as many as possible of the old roof timbers were reused and clad with new corrugated iron.
A ventilation fleche and dormer windows were inserted to allow the attic space to be used and timber columns were added to the lower floors to help support the extra weight.
A gantry and new main entrance to William Street with a semicircular hood effectively changed the orientation of the building towards the city.
A new concrete retaining wall was constructed along part of the Miller Park frontage on William Street.
The timber paling fence extended the full width of both lots was refurbished.
Work was completed in 1913 and an electric goods lift added the following year.

In 1923, the State Stores Board was created as an initiative of the Labor government to facilitate efficient and economical purchase and distribution of goods used by government departments.
This system ran with little change until the 1980s and it was administered from the former Commissariat Store, now renamed the States Stores Building.
As storage needs increased, some sections moved to other buildings and in 1960 Stores vacated the building.
Queensland State Archives then occupied the ground floor until 1968 and various government departments used the upper floors.
Some alterations were made to accommodate their use, including installation of a new lift, which necessitated the removal of the penthouse of the 1914 lift, and probable removal of the fleche.

A plan from 1944 indicates that a number of ancillary buildings stood in the yard surrounding the Commissariat Store at that time, including: the two-story brick annexe in the southern corner (1886 and 1900); a packing case shed in the western corner; storage sheds along the northern part of the eastern elevation and the north and south- eastern walls of the building; a saddlery store along the entire north-eastern wall of the building (almost filling the gap between the building and the retaining wall to William Street); and a toilet block in the northern corner of the site.

During World War II, occupants of the store utilised a stair and walkway constructed at the top of the W
In 1898 the Commissariat Store was renamed the Government Store to reflect the Federation movement. By 1911 an additional storey was designed by Leonard Kempster, an architect for the Department of Public Works, in order to increase accommodation and provide access to William Street. Contractor, William Kitchen oversaw the construction of the new addition, which was completed in 1913. An electrical lift was then installed in 1914, operating between the three storeys.
The Queensland Government created the State Stores Board in Queensland on 23 March 1923, which would purchase and distribute all goods required by all government departments. The inaugural meeting of the State Stores Board was then held on 29 March 1923 at the Government Store. It was renamed the State Stores Building, and eventually vacated by them on 12 September 1960.
The Building resumed providing accommodation for other overcrowded government departments, such as the Stock and Water Supplies Branch of the State Irrigation and Water Supply Commission until 1962, and the State Archives until 1968. The Firms Branch, Department of Justice, and Department of Stores shared the second floor. While the State Library and Law Reform Commission also occupied the building temporarily, all vacating the building by 1976.
In time, and as the city developed, the river location became less convenient. By 1907 it was deemed by the storekeeper to be too far from the steamer wharf and railway station. In 1911 he suggested that if relocation was not possible, the addition of a lightweight upper storey with access to William Street would be helpful, providing increased floor space and improving lighting and summer cooling conditions. This suggestion was adopted and the work was commenced by contractor William Kitchen at a cost of £2194 pounds in late 1912.
The new storey was constructed of rendered brick in a Georgian Revival style sympathetic to the existing building. To keep costs down, as many as possible of the old roof timbers were reused and clad with new corrugated iron. A ventilation fleche and dormer windows were inserted to allow the attic space to be used and timber columns were added to the lower floors to help support the extra weight. A gantry and new main entrance to William Street with a semicircular hood effectively changed the orientation of the building towards the city. A new concrete retaining wall was constructed along part of the Miller Park frontage on William Street. The timber paling fence extended the full width of both lots was refurbished. Work was completed in 1913 and an electric goods lift added the following year.
In 1923, the State Stores Board was created as an initiative of the Labor government to facilitate efficient and economical purchase and distribution of goods used by government departments. This system ran with little change until the 1980s and it was administered from the former Commissariat Store, now renamed the States Stores Building. As storage needs increased, some sections moved to other buildings and in 1960 Stores vacated the building. Queensland State Archives then occupied the ground floor until 1968 and various government departments used the upper floors. Some alterations were made to accommodate their use, including installation of a new lift, which necessitated the removal of the penthouse of the 1914 lift, and probable removal of the fleche.
A plan from 1944 indicates that a number of ancillary buildings stood in the yard surrounding the Commissariat Store at that time, including: the two-story brick annexe in the southern corner (1886 and 1900); a packing case shed in the western corner; storage sheds along the northern part of the eastern elevation and the north and south- eastern walls of the building; a saddlery store along the entire north-eastern wall of the building (almost filling the gap between the building and the retaining wall to William Street); and a toilet block in the northern corner of the site.
During World War II, occupants of the store utilised a stair and walkway constructed at the top of the W
Commissariat Store, Brisbane