Globally, green buildings (GBs) are receiving more and more attentions. GBs with it's benefits has been recognized by many governments and promoted as a strategy for reaching Sustainable Development (SD). However, barriers of GBs, such as higher initial cost and lack of awareness, further indicate that proper strategies need to be devised for promoting the wider adoption of GBs in construction industry as well as buildings development. To date, there are limited empirical studies identifying the strategies for promoting GBs in developing countries, especially in Vietnam. This study aims to propose the suitable promoting strategies for GBs in Vietnam conditions by researching on consumer's behaviors on green - certified buildings. An empirical study was conducted with 308 responses of Vietnamese people to figure out main factors that affects to consumer's behaviors. The econometric analysis results confirmed the importance of 'income', 'environmental awareness', 'knowledge', 'personal benefits' and 'trend' to consumer willingness to buy (WTB) green – certified buildings. Then, by combining the results and reviewing comprehensive literature, “availability of better information on cost and benefits of GBTs”; “educational programs for developers, contractors, and policy makers related to GBTs” were identified as the most important promotion strategies. Additionally, ‘financial and further market-based incentives for GBTs adopters’ also need to pay an attention to ensure overall performance of promoting GBs.