Ngang Ihakhang is a private lhakhang founded in the 15th century by a Tibetan Lama Namkha Samdrup who was well known as Tshampa lama. He is also said to have built Namkhoe lhakhang in Tang valley. The oral history says that Lama Namkha Samdrup walked from Lhodrak Kharchu in Tibet and settled in the north of Bumthang. The lhakhang is said to be built as per the prophecy made by khandrom (angle) in a dream. The next day, he walked south. When he reached the place where the lhakhang stands today, he saw two beautiful swans (Ja Ngangpa) came flying in circles and landing on a lake. The lama considered this an auspicious sign and decided to build a one-storied structure as his residence. The lhakhang is believed to have been built on the lake with the help of lay monks (Gomchens) and the local communities. The lhakhang was razed to the ground by a fire in the late 19th century and it was then restored as two storied by the late 6th Kolay Lama who is one of the lama’s collateral lineage. Later, it was renovated by the descendants of Pema Lingpa.