Find Phone number, Location Address and all other information of Construction Companies in Islamabad Great Wall Developers & Traders (Pvt) Ltd. Islamabad on Branches.pk, Pakistan’s Largest Branches Directory. You can contact them directly on Phone number +92-51-2876752, or you can visit their location in person, address location is: Office# 13, Ist Flr. Beverly Centre, Blue Area, Islamabad.