Science and Education Publishing American Journal of Civil Engineering and Architecture 2328-3998 4 6 2016 11 14 Effects of Faulty Design Phase on School Buildings Maintenance in Gaza Strip 199 210 EN B.A. Tayeh Civil Engineering Department, Islamic University of Gaza, Gaza, Palestine Khalid Al Hallaq Fathi A. Sabha AJCEA2016462 10.12691/ajcea-4-6-2 2016 5 30 2016 10 15 2016 11 12 The aim of this paper is to identify and rank the design phase faults/errors affecting on the maintenance of the United Nations Relief and Works Agency (UNRWA)'s school's buildings in Gaza Strip, and to propose recommendations for minimizing the future maintenance problem related to the school buildings at Gaza Strip. A survey was conducted to collect the required data were adopted in this study. This study reveals the important factors that leading to defects in the design stage which includes: lack of workshops to discuss construction problems between project parts, Inadequate QA/QC programs during design stage, Lack of auditing and archiving of approved as-built drawing documents electronically after the completion the project. The study recommends several actions to improve maintenance performance of UNRWA's schools in Gaza Strip. The designer must take into account maintenance considerations during the design and supervision stages by choosing of durable materials. The UNRWA should conduct workshops or training courses for designers, supervisor, and maintenance engineers.