Derna Shura Council has called Turkey's Ozaltin Holding and South Korea's Won Construction to return to the city and resume their infrastructure projects.
The council, which controls the city, promised to provide full protection and security for both companies' workers and equipment.
The call came after the defeat of IS militants by fighters of the council in June.
Infrastructure Projects were stalled in 2011. Won Construction was about to finish the 2,500 housing-unit project in the city when it came to a halt due to unrest surrounded the 2011 revolution. 75% of the project has been already completed. Turkey's Ozaltin is engaged in urban planning.