Serb military operations and the Nato bombing wrecked more than 120,000 buildings including 60,000 homes.
The international community has pledged $2.1bn for reconstruction, which is expected to begin in earnest this year.
But the US says many governments which promised money have failed to pay up.
Emergency repairs last year aimed to restore basic communications and utilities and ensure each family had one habitable room by winter.
Mine clearance also continues. More than 16,000 houses and 80% of all schools have been demined and more than 15,000 mines, cluster bombs and other ordnance removed from public areas.