Aims and Objectives: To assess the marked effect of periodontal conditions on oral health–related quality of life in the construction workers in poonamallee, Chennai. Materials and Methods: This cross-sectional study was carried out among 217 participants, with specific age group 20–60 years, through various camps conducted by the Faculty of Saveetha dental college and Hospital, Saveetha University, Chennai. The data collection included a combination of clinical examination for the assessment of oral health status and questionnaire administration. Pretested questionnaires and significant oral findings were the sources of data collection. The student t-test was applied for the statistical evaluation of differences in means whereas proportions were compared by use of the chi-square test. Confidence Interval was taken as 95%. Statistical significance of P< 0.05 was used. Results: The severity of periodontal disease has a direct effect on oral health–related quality of life. In CPITN index 8.29% had healthy gingiva and 4.61% had bleeding on probing. Participants with good OHIP, 18.89% had bleeding on probing, 11.52% had calculus and it was also found that 3.23% had pocket of 4 to 5mm.The extent and severity were also found to be proportional to the severity of periodontitis. Conclusion: Oral health–related quality of life worsens with the extension in severity of chronic periodontitis.