Background: The construction sector is the main pillar in the Palestinian economy, where the Qatari Grant projects form the largest part of the construction projects spent in Gaza Strip. Objective: This research aims to improve the performance of all parties involved in the Qatari projects by identifying the factors of success and revising the factors of failure dominating the construction projects in Gaza strip. Methods: This study was carried out through distributing ninety-three questionnaires to the contracting companies working in Qatari grant projects, the consulting offices supervising Qatari grant projects, the Ministry of Public Works and Housing, and the Qatari committee. Results: The study found that the most affecting factors are: the clear scope of the project, the experience of the design team, the experience of the contractor, closure of crossing points, the highly qualified technical staff, the availability of funding, the mechanism of payments, reputation of the contractor, delay in obtaining fund and sufficient time for design. Conclusion: The results have led to several recommendations aimed to achieve the success of construction projects in general and Qatari projects in Gaza Strip in particular. These are: the need to give sufficient time to design, sufficient consideration of all proposals, the inclusion of all parties in the design phase, studying the surrounding circumstances, identifying alternatives to materials to be used instead of others, and the need to employing a highly experienced technical team and conducting training courses. In addition, the contractor's interest in delivering a high-quality work that satisfies all parties must be taken into consideration. © 2018 Tayeh et al.