This paper discusses change orders in public construction projects in Jordan. A host of factors affecting change orders in public projects were identified and classified according to Drewin’s open conversion system. The most common factors were evaluated by using both the data collected through a survey conducted on construction projects’ consultant engineers, contractors, and owners and interviews with senior professionals and managers in the field. Most correspondents agreed that factors related to the owner’s internal environment,“Owner instructs modification to design,” and “Owner instructs additional works” are the leading factors directly affecting change orders in public construction projects. Exogenous factors,“Safety rules and regulations are not followed within the contractor's organization”,“Severe weather conditions on the job site” and “Changes in government regulations and laws” ranked lowest by all three parties.