Smart Environments (SmE) are a growing combination of various computing frameworks (ubiquitous, pervasive etc), devices, control algorithms and a complex web of interactions. It is at the core of user facilitation in a number of industrial, domestic and public areas. Based on their application areas, SmE may be critical in terms of correctness, reliability, safety, security etc. To achieve error-free and requirement-compliant implementation, these systems are designed resorting to various modeling approaches including Ontology and Statecharts. This paper attempts to consider correctness, reliability, safety and security in the design process of SmE and its related components by proposing a design time modeling and formal verification methodology. The proposed methodology covers various design features related to modeling and formal verification SmE (focusing on users, devices, environment, control algorithms and their interaction) against the set of the requirements through model checking. A realistic case study of a Bank Door Security Booth System (BDSB) is tested. The results show the successful verification of the properties related to the safety, security and desired reliable behavior of BDSB.