REGIONS of Victoria ravaged in the 2009 Black Saturday fires will be rebuilt within four years.

Deputy Premier Peter Ryan spoke of the rebuilding process at the launch of a Victorian Bushfire Recovery report, ahead of the third anniversary of the February 7 disaster which killed 173 people.

"I am confident that within the next two, three, four years, this whole region and across the state will have recovered very substantially from this shocking disaster, recovered in a material, in a reconstruction, in a physical sense," he said.

"The issues around the poor people that suffered this, of course, for many of them they will never recover, that's the fact.

"For many others it's a generational issue (that) we will continue to support them."

Mr Ryan said the recovery effort was continuing, with about 77 per cent of the homes damaged having either been rebuilt, going through the process of rebuilding or owners having found another property.

Another 16 per cent of residents were in the process of making application to begin rebuilding.