Triaco formerly started as a Non Profit entity in 1984 in Jakarta and most of their works are related on Community Development projects.

Upon demand, an Architecture, Master Planning / Urban Design and Construction Management Division was added under a For Profit arm . Since It has established a reputable track record of its works,which strongly show its originality and quality, with its recognition by IAI (Indonesian Institute of Architects) as one of the best Architects in Indonesia, awarded the Aga Khan Award of Excellence in the early 90’s. In 95, Triaco has expanded with a branch in Bali.

The Community Development Division itself has expanded and merged with friends with the same vision from Australia. Now active in several countries in Asia , Africa, India, and Latin America (Community Housing Ltd Australia and Community Housing Indonesia).

Our partners:
OG Architect
Eco Sanur


With three Main Architects from USA, Japan, and Germany as a team with other young Indonesian Architects continue Architectural works. Most of our works are custom houses and villas as well as hotels, shops, schools and still master planning for estate developers.

Antonio Ismael Risianto (MIT/ UC Berkeley Graduate)

Antonio Ismael Risianto, Born in Amsterdam, Educated in Architecture and Urban Planning (@ UC Berkeley and MIT , Post Master’s 1981 ).

Practiced in San Francisco, among others, with   Escherick , Dodge, Homsey Assoc., HOK , and Oakland Redevelopment Agency for a total 10 years, before moving to Indonesia in 1984. Set up Triaco Architect & Development Consultant (Now Triaco Arch) for the last 30 years. Most of the works are on urban planning , housing , and commercial buildings. Received the Alcoa Award, Aga Khan Award for Architecture and Best IAI   (Indonesian Architects Association) Architects Award.

Teaching as a Guest Lecturer in various local as well as overseas Universities , such as NUS Singapore, Darmstads University Germany, University of Hawaii, Chulalongkorn University in Thailand. Currently a Technical Advisor for the Government relating to Housing for the Poor.

Oliver Gehlen (Technical University Munich & ETH Zurich)

Oliver Gehlen completed his architectural studies in the 90s at the Technical University of Munich, Germany and at ETH Zürich, Switzerland with Masters qualification. In 2001, Oliver Gehlen moved from Berlin to Indonesia. He had been permanently continuing his architectural career and living in Bali ever since.

Shin Hasegawa (Chuo University, Japan)

Shin Hasegawa graduated from Architecture Department at Chuo University, Japan. He began his architectural career at nSTUDIO, Tokyo-based Architecture Office in Japan from 2007 – 2009. In 2010, he moved to Indonesia and joined Triaco Bali as Senior Architect and Associates.