Secretary-General of King Abdullah for Developmental Housing Dr. Ahmed bin Hasan Aerjana has signed a number of construction contracts to build 900 housing units spreading over Riyadh, Hail, Northern Border, Makkah, Asir, Najran, Al-Baha, Qassim, Al-Joaf, as each location includes 100 housing units, a mosque ,and cooperative association with a total cost of SR350 million. The implementation of the project, assigned to a number of national companies, will take 24 months while the supervision of construction work will be awarded to a specialized consultancy office, Aerjana said following the signing ceremony.