The pink areas represent each of the proposed new homes

The 43-year-old Hollywood star, who has pledged $5m (�2.4m) of his own money to the initiative, made an appeal for further donations to the fund.

Each house in the city's Lower Ninth Ward, which was deluged by flooding in 2005, will be built on stilts.

Pitt and partner Angelina Jolie own a mansion in New Orleans' French Quarter.

Their home in the fashionable district is said to be valued at some $3.5m (�1.7m).

'Adopt-a-house'

Jolie and the couple's son Maddox accompanied Pitt as he campaigned for further funds on The Today Show on US network NBC.

Pitt's partner Angelina Jolie and son Maddox lent their support

"This is really an adopt-a-house campaign," said Pitt, who hoped that wealthy individuals, church groups and businesses would make pledges of $150,000 (�72,750), the sum needed to give a family a new home.

The actor admitted that he was "not much of a salesman" in his appeal for people to become involved in the Make It Right initiative.

But he added that he hoped to see the foundations for the houses in place by the summer.

"There is no reason why we can't do 1,000 homes, why we can't do 10,000 homes," said Pitt, against a backdrop of pink shapes, representing locations where the houses will stand.

The buildings, which have been designed by a team of 13 architects, have been planned to environmentally-friendly specifications.

1. Rooftop solar panels act as a source of clean, renewable power for the house 2. Rainwater harvesting system captures runoff from the roof to provide water for toilet flushing and the garden 3. Back-up emergency generator to provide power during storms or other crises 4. House elevated on concrete stilts to provide protection from floodwater.