Construction projects located in the Gaza Strip, Palestine suffer from many problems and complex issues. Consequently, the objective of this study is to identify the factors affecting the performance of local construction projects; and to elicit perceptions of their relative importance. The most important factors affecting project performance are: delays because of borders/roads closure leading to materials shortage; unavailability of resources; low level of project leadership skills; escalation of material prices; unavailability of highly experienced and qualified personnel; and poor quality of available equipment and raw materials. Based on these findings, the study recommends that: 1) project owners must work collaboratively with contractors and facilitate regular payments in order to overcome delays, disputes and claims; 2) project participants should actively have their input in the process of decision- making; and 3) continuous coordination and relationship between project participants are required through the project life cycle in order to solve problems and develop project performance.