Sushil Gyewali, who was recently appointed to head the National Reconstruction Authority, said reconstruction work will formally begin on Jan. 16.
Officials will send 1,500 engineers to villages in all of the 40 affected districts to take detailed damage surveys. They will train technicians to build safer houses, coordinate between the government offices and also collect money from donors.
Nearly 9,000 people were killed in the April 25 earthquake and aftershocks. Nearly a million houses and buildings were damaged.
Foreign donors have pledged $4.1 billion for earthquake reconstruction, but only a small amount of that money has reached Nepal because it took months to set up the new agency to deal with the task.
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Nepal's main political parties were able to finally reach agreement last month and new laws were approved in parliament to allow the government to form the agency and appoint Gyewali as the chief executive officer.
Aid groups have warned of a crisis unfolding in Nepal during the winter, especially for many of the estimated 400,000 people who live at elevations of 1,500 meters (4,920 feet) or higher.