Quality Auditing & Third Party Inspection is one of the most important factors during theconstruction projects; and in that auditing also plays very vital role to maintaining the quality of the projects during their various parameters. This study highlights the factors affecting on constrictionquality.A questionnaire was used to gather the relevant that involves 72 factors divided into four categories which are Engineering group, Contractor Group, Quality Control Group, Customer satisfaction group. The Relative Importance Index was determined and the factors were ranked. The top factors mainly affecting to the construction quality that are to be described.