Constructability, as per the Construction Industry Institute (CII) (1986), is defined as the optimum use of construction knowledge and experience in the conceptual planning, detailed engineering, procurement, and field operations phases to achieve the overall project objective. Since the nineteen-eighties, when it was first known, researchers investigated constructability implementation into different types of projects and addressed the benefits and challenges associated with implementing constructability (Jester, 2003). There were few studies related to constructability in the Gulf countries, with no study recorded in Oman. This research aims to review the concept of constructability and evaluate the level implementation of constructability practices in the construction industry in Muscat Governorate. The methodology followed in this research consist of a systematic literature review based on PRISMA. Based on the state-of-art, a questionnaire is developed with consultations with academics and practitioners from the industry. The questionnaire is then distributed to different stakeholders involved in construction projects such as clients, contractors, engineers, and architects in Muscat to collect the relevant required information to identify the level of implementation of constructability in Muscat Governorate in Oman. Following PRISMA methodology, 113 publications were identified to fall within the interest of this study field. In short, most of the publications (26%) were published in the US, which can be reasoned that it was first known there. Most of the journal articles that conducted the literature review as the methodology for their studies were done a post to 2011. The justification of this result can be attributed to the researchers' aim to aggregate the research advancement in constructability. Eighty-five respondents participated in the distributed questionnaire. The questionnaire showed that constructability efforts are recognised, supported, and practiced by clients, designers, and builders, indicating the acceptance of constructability throughout the industry. In addition, 45% of the respondents said that constructability efforts typically begin in the pre-project planning which shows a positive awareness among the respondents that constructability efforts must start at the earliest stage of a project's life cycle. Also, 60% of the respondents showed that they performed constructability during the design by following a constructability manual. Finally, the respondents agreed that the obstacles regarding constructability implementation remain, such as the cost, time and the project delivery method. However, it can be concluded that the level of constructability of implementation, although the awareness exists, is still developing. Further efforts, especially from the owners perspective, is required to improve it to achieve a mature level.