Topgay Raja married Princess Mayum Choying Wangmo, the youngest daughter of the Sikkimese Chogyal, at Bhutan House on April 5, 1918.
Jigme Palden Dorji was assassinated amid a political struggle between modernist pro-Dorji and monarchist pro-Wangchuck factions.
[citation needed] Topgay's elder daughter Ashi Tashi Dorji served as the Gyaltshab (King's Representative / Regent) of Eastern Bhutan.
[13] Administering from Bhutan House, Sonam Topgay Dorji was also Governor of Haa, directly abutting the estate, between 1917 and 1924.
[2] On April 23, 1948, Topgay Dorji headed the Bhutanese delegation to recently independent India, meeting Prime Minister Jawaharlal Nehru.
In 1917, he was granted the titles of Rai Bahadur and Raja by King George V. In 1918, he was made Deputy Minister (Kashag officer of the fourth rank) by the Thirteenth Dalai Lama of Tibet.
[citation needed] Topgay Dorji passed away at Bhutan House in September 1953, due to his diabetes which had worsened over time.