Two aspects that has to be considered in a construction project are project management which usually associates with maturity model and sustainability. Sustainability in construction usually known as sustainable construction, emerge as a result of waste generated by construction project which responsible for an estimated 50 percent of solid waste. Construction of a meteorological instrument station also takes part in contribution of solid waste. Due to weather uncertainty, more meteorological instrument stations are being construct progressively. Aside from the time consuming construction, it is also located among residential area which will be used for a long period of time. The sustainability theory itself has 3 pillars that is economy, environment, and social. Therefore, it is important for contractor to implement sustainability practices. The purpose of this article is to assess sustainability practices in case studies addressed to construction of meteorological instrument stations in 3 different locations in Indonesia. The result, which processed using Distance to Ideal Maturity Level (DIML) and Important Performance Analysis (IPA), shows one location with lowest maturity level (3 out of 5). Furthermore, recommendations on sustainability practices are provided in order to improve the maturity level of the project. © 2021 Alpha Publishers. All rights reserved.