The residential flat promoter services are vastly providing more different offers and opportunities to the buyers. The customers have to consider so many factors before and after purchasing the residential flat. The objectives of study are to study growth and development of residential flat promoter services and to show the buyers behaviour towards the service quality of the residential flat promoters in the Coimbatore city. The study analyzes the factor that affects purchase decisions of residential flat and perceptions of the respondents about the service quality of the promoters in Coimbatore city, interview schedule method has adopted for the present study. The researcher has taken 400 buyers of residential flat were selected from the Coimbatore City. The primary data were used to analysis the perception level of the customers in the study area. The present study has been used the tools like descriptive analysis and ANOVA test to find out the perception level of the apartment buyers. The promoter’s quality service is changing the buyer’s behaviors and satisfied in their perception level towards purchase of residential flats in Coimbatore city.