Property developer Goodman Group says it will start developing new projects worth about $451 million across key Australian markets.

The 210,000 square metres of new industrial and commercial development projects would be in addition to the $227 million of development projects currently in progress, it said on Monday.

"Goodman Australia's development team has finished the 2012 year strongly, with a number of key customer pre-commitments across NSW and Victoria," Goodman's general manager Australia Jason Little said in a statement.

The continued growth in development activity reflected the strength of Goodman's existing customer relationships, the high demand for prime logistics and business space, and the strategic location of the group's development pipeline in highly-sought-after regions across Sydney and Melbourne, it said.

Goodman securities were steady at $4.64 at 1131 AEDT on Monday.