In early 2000s, DETECH anticipated a significant increase in demand for high-quality office space thanks to foreign direct investment (FDI) inflow and the economic development of Hanoi city DETECH has successively undertaken the construction of office buildings for lease, including DETECH Building (2006) and later DETECH TOWER I (2012) at 8 Ton That Thuyet Street, My Dinh 2 Ward, Nam Tu Liem District. Both buildings are conveniently located in a strategically planned area of Hanoi City, 250 meters from My Dinh Bus Station, 2 kilometers from the National Convention Center, and across from the headquarters of the Ministry of Natural Resources and Environment, the Ministry of Home Affairs, the Central Farmers' Association of Vietnam, Toyota My Dinh, Audi, Mercedes-Benz North Vietnam. Both buildings offer  more than 20,000 square meters of office space with high-quality construction and modern facilities, hence consistently have one of the highest occupancy rates in the Cau Giay and Nam Tu Liem districts.

In 2018, DETECH continued its success in Hanoi office space market with the introduction of DETECH TOWER II at 107 Nguyen Phong Sac, the center of Cau Giay District. With its experience in developing office building for lease, DETECH TOWER II, with nearly 15,000 square meters of office space for lease, achieved an occupancy rate of over 90% before its official opening and is now one of the top choices for tenants looking for space in this area. 

DETECH is currently implementing a mixed-use project – the company headquarters in D14 New Urban Area Cau Giay, My Dinh 2 Ward, Nam Tu Liem District, Hanoi. On a land area of 5,335.9 square meters, DETECH will construct a complex with two towers of 32 and 30 stories respectively, interconnected by a 10-story podium and a 4-story basement, which provide  138 four-star serviced apartments, 34,000 square meters of premium office space for lease, and 14,500 square meters of parking space.. 

Having nearly 20 years of experience in the development, management, and operation of office buildings for lease, DETECH has become a reputable and reliable brand in the Hanoi office rental market through the development of office buildings in prime locations, modern facilities, and international management and operation standards.