The move makes existing sites, managed by the NDA, to be the obvious and natural choice for new nuclear build.
According to a statement from the NDA, the move is in response to both market interest in building new nuclear, and to, "invite proposals which meet its strategic objectives and maximise value for the UK taxpayer."
The NDA suggests interested parties should approach them, and state which assets and activities they have an interest in, by April 3, and then consider responses.
The department for Business and Regulatory Reform said, it had, "invited energy companies to come forward with proposals for new nuclear power stations, there has been considerable interest from the energy industry in the role the NDA's sites could play."
Business Secretary John Hutton was delighted by the news. "Interest in building new nuclear power stations in the UK is strong. Planning applications for new plants are likely to focus on areas in the vicinity of existing sites and so it's welcome that the NDA is making its significant land and other assets available to the market."
The NDA offers its land, fuel manufacturing business at Springfields and uranic material. All could be used in building or operating the next generation of stations, or for other commercial opportunities.
However, the body warns that those wanting to build new nuclear power stations must wait for the government's Strategic Siting Assessment, which begins this Spring.
The NDA owns 18 existing nuclear sites. Two are still operational: Wylfa and Oldbury. Seventeen are in decommissioning: Dounreay, Hunterston A, Chapelcross, Calder Hall, Trawsfynydd, Sellafield, Windscale, Winfrith, Sizewell A, Bradwell, Berkeley, Hinkley Point A, Dungeness A, Springfields, Capenhurst and Low Level Waste Repository.
Greenpeace are still considering a fresh legal challenge to the government's second consultation into new nuclear build. Greenpeace turned the government's first consultation over under judicial review.