The developers Chartered Land say they hope to start work within months on restoring buildings on Moore Street where leaders of the 1916 rising held their last council of war.
The Department of Finance has confirmed that NAMA will fund the project and it is hoped this means the restoration will be completed in time for the centenary of the rising.
The four buildings, numbers 14 to 17 Moore Street, have been declared a national monument.
Architects have reported that much of the interiors remain intact since 1916 and they have found the remains of tunnels made through the walls by rebels as they tried to fight their way out.
Chartered Land also has planning permission for a major shopping centre development in the area called Dublin Central.
Last year Minister for Arts, Heritage and the Gaeltacht Jimmy Deenihan gave permission for the developers to restore the national monument and build an interpretative centre.
However the Minister added a number of conditions including scrapping an underground car park planned to be built under the monument.
The conditions also state that the back yards of the buildings have to preserved, meaning that the retail development will be further away from the historic site.
The developers have agreed that any piling to be carried out to build the shopping centre will be further away from the monument.
In drawing up its revised plans, Chartered Land have had a number of meetings with the Department to make sure they comply with the conditions.
The plans will be submitted shortly and if cleared by the Minister and Dublin City Council work could start in May.
Two buildings either side of the monument will have to be demolished for work to start, one is the popular Paris Bakery and it’s understood that Chartered Lands are in discussions with the bakery about a relocation.
Some relatives have welcomed the restoration of the monument but James Connolly Heron of the Save Moore St Campaign says much more of the area is a battlefield and should be preserved.