Onyx Phaholyothin is a condominium project, developed by Sansiri, located at 1503 Thanon Phahon Yothin, Khwaeng Samsen Nai, Khet Phaya Thai, Krung Thep Maha Nakhon 10400. Sansiri is also the developer behind Autumn Hua Hin, Preen by Sansiri and Baan Siri Sathorn Yenakard. Construction of Onyx Phaholyothin was completed in 2013. Condominium comprises of a single building, having 26 floors and includes 620 units.