The building has been restored and renovated by the São Paulo State Government, as part of the downtown revitalization in that city.

Governor Mário Covas visualized the Julio Prestes Space as ideal for symphonic presentations and because OSESP did not have a permanent home at that time.

After the 1929 New York Exchange crash and recession that followed, the São Paulo coffee stock market declined in importance.

The FEPASA line, which had become infamous for lateness & technical problems, was finally replaced by the automobile and most stations closed their doors to passenger transportation between SW towns and the state capital.

From the 1980s on the Companhia de Trens Metropolitanos - CPTM - took over the line, operating only in the metropolitan area and municipalities in the Greater São Paulo region.

In the beginning of the 21st century, engineers working on the transformation of the Grand Hall have also had their difficulties to reconcile today's technology with historical conservation.

It has portable risers which allow choir and orchestra to alternate in mid concert, as well as a stage elevator for a piano.

For this reason the main hall's 15 centimeter-thick floating floor was built on an immense neoprene slab which functions like a massive wedge between two concrete layers lined with Brazilian walnut, ideal material for absorbing noise.

In addition to this, ante-chambers were built in all the circulation areas and accesses to the concert hall to exclude undesirable noises.

Over the ceiling there is a polycarbonate cover with rounded ends, which respects the concept of the building's original project but uses more modern materials.

This is equal to the added weight of the concert hall ceiling, acoustic isolation, technical floor and air conditioning system.