The e PyunhanSesang is a leading brand that has developed eco-friendly and energy efficient apartment with innovative technology since the Daelim Engineering & Construction introduced Korea's first apartment brand in the early 2000s. The ePyunhanSesang is rated as the beginning point converting the corporate brand-led APT market into the era of individual brands. The vision of the ePyunhanSesang is to actualize the most comfortable residential living, based on quality and practicality, which are the brand concepts. The e PyunhanSesang is also evaluated to have built up strong brand powers with its recent advertising campaign, 'Built with Sincerity(or True heart Campaign)'. This paper examined the key success factors of this brand communications and investigated the working level and theoretical implications. The results showed the three key success factors of this brand : a systematic establishment of brand strategy, a providing different positioning, and a strategic management planning. On the basis of the findings, implications are discussed for academicians as well as practitioners.