The massive Fishermans Bend development zone will undergo further expansion with the addition of a new "employment precinct" that will have no height limit.

The changes will expand the power of Planning Minister Richard Wynne in the development zone.

The precincts of Fishermans Bend.

Mr Wynne announced on Friday that the area will increase from 250 to 455 hectares to accommodate a fifth precinct within the Fishermans Bend renewal area. The expansion will double the size of the city centre.

Mr Wynne said interim height controls of 40 storeys would be put in place in the Montague and Lorimer areas in Fishermans Bend. However, there will be no interim height limits on the employment precinct.