The paper presented a method for solving a construction planning problem in a housing development project using a mathematical model which is an integer linear programming for dividing house construction jobs to three contractors in a project case study. 169 units of the houses in the project would be constructed by the three contractors in two methods, conventional construction method and precast method. The results found a minimum construction cost of the project was 417.69 million baht (M$13.92), and within the total project duration of 72 months. Conclusions and recommendations were discussed in this article.Keywords: Housing Development Project, Mathematical Model, Precast Concrete Construction.eISSN 2398-4295 © 2018. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open-access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. DOI: http://dx.doi.org/10.21834/ajbes.v3i13.140