The project attracted attention and debates in the country's mass media concerning the construction site and conservation of Ba Đình Hall.

With the expectation that this land (now Quần Ngựa Sports Palace) would be devoted to the new National Assembly building, the joint Sino-Vietnamese team submitted their completed plans to the Ministry of Construction.

Upon the return of the experts to China, the Vietnamese leaders announced their agreement with the idea but the domestic and international situation of the country meant that construction was not feasible.

[14][9][7] After reunification and the Đổi Mới reforms, Prime Minister Võ Văn Kiệt proposed building a new legislative hall on a grander scale to represent Vietnam's new era of development.

The Ministry proposed the site of 18 Hoàng Diệu Street as it was an expansive, undeveloped piece of land with only Ba Đình Hall having been built there.

[9] In October 2002, the government established the Steering Committee for Construction of the National Assembly House and Ba Dinh Hall (new) initiated by then-Deputy Prime Minister Nguyễn Tấn Dũng.

[9] The Politburo decided to suspend the project in October 2003, instead focusing on excavating the Imperial Citadel of Thăng Long and building the Vietnam National Convention Center.

[20] When the time came to restart the project, new sites were proposed at the locations of 37 Hùng Vương Street, the Vietnam Military History Museum; the area formerly occupied by Cột Cờ stadium (behind the Ministry of Defence on Nguyễn Tri Phương Street), left of Ba Đình Hall (behind General Võ Nguyên Giáp's residence and the Ministry of Foreign Affairs) and various other places.

[25][26] In July 2007, the Government established the Steering Committee for the construction of the National Assembly House headed by standing Deputy Prime Minister Nguyễn Sinh Hùng.

734 / TTg-KTN approving the selection of an architectural plan for the National Assembly House, and started the process of appointing a contractor for the design and construction of the project.

[29] Between 2008 and 2009, the renowned firms gmp International GmbH - Inros Lackner AG conducted the adjustment and completion of the detailed design of the National Assembly project to carry out construction.

[29] Due to the large size and complexity of the project, Prime Minister Võ Văn Kiệt requested that a competition be held to choose the architectural plans.

[9] 25 contest plans from 22 design organizations in 12 countries were submitted to a judging committee consisting of leading Vietnamese experts and four foreign members nominated by the International Architects Association.

[30] Experts in the field of architecture said that the contest was held unprofessionally, not following the standards of international competition for works of the caliber of the National Assembly, leading to quantity and quality.

Deputy Minister of Construction Trần Ngọc Chính, who served as the chairman of the selection council, said that out of those options, one would be used while the other four would get consolation prizes.

[34][35] At last, the architectural plan of the National Assembly House was selected as the one to win the National Assembly House Architectural Design Competition (2007) with some upgrades and adjustments such as: narrowing the size to 102m × 102m, ensuring the reverse position is not more than 20m to the East of Ba Dinh Hall campus, the maximum construction density at Lot D is 40% combined with the construction of auxiliary works for relic conservation at 18 Hoang Dieu.

Joint venture gmp International GmbH - Inros Lackner AG (Federal Republic of Germany) as the main consultant.

[43][44] The total ground for the construction of the National Assembly House in Ba Dinh political center (about 22 ha) was bounded as follows:[29] The hall is located on the corner of Independence and Bắc Sơn streets.

[7][46] The National Assembly meeting room in the middle that extends from the bottom to the roof is placed on eight circular columns surrounding the main hall.

[50] The Tan Trao room serves as the meeting place of the Standing Committee of the National Assembly and is located on the second floor in the east wing.

A tunnel connects the National Assembly House and the Headquarters of the Ministry of Foreign Affairs (1 Tôn Thất Đàm street) 60m long, with two separate pedestrian and car sections.

The chairs, variants of the Sensó RT, are exclusively designed by Figueras International Seating Company for the National Assembly House and manufactured in Spain.

[42] A copy of the emblem of Vietnam hangs in the middle of the building's facade, made of pure copper, weighing 2.5 tons domestically.

The lobby outside the building and Bắc Sơn Square are paved with hundreds of thousands of tons of anti-slip granite mined in Bình Định.

The high-rise outdoor area of the building has 14 hanging gardens interspersed with offices, forming patches on the cube, planted with palm trees, bamboo, and sesame buds.

Archaeological excavation site 18 Hoang Dieu is divided into 4 zones by the Archaeological Institute, named A, B, C, D.[12][60] In the excavation areas, many types of architectural relics and relics have been discovered, overlapping for 1300 years: starting from the La Dynasty (7th – 9th century), through the Dinh - Pre-Le dynasties (10th century), Ly (1009–1225), Tran (1226–1400), Ho (1400–1407), Le s (1428–1527), Mac (1527– 1592), Le Trung Hung (1592–1789) and Nguyen (1802 –1945).

The bottom layer is the architectural system of the Pre-Thang Long period, also known as the period of Annam Province or Đại La, clearly shown through the system of wooden pillars, architectural foundations, drainage sewers, water wells and relics such as "Jiangxi Quan" bricks, the head of the tile is decorated with the image of a beast, a clown face and many objects.

[12] Archaeologists have found unique monuments and artifacts associated with the state monarch of Vietnam and royal life but still controversial about name as well as function: altar,[64] piece of wood engraved with the word "Fate Chi Bao"[65]...

[67] In 2015, the management board of the investment project to build the National Assembly House and Ba Dinh Hall (new) handed over the archaeological site of 18 Hoang Dieu to the Thang Long Heritage Conservation Center - Hanoi.

(illustration of the food canister for birds in the Palace) ...[70][56] Displaying in the basement of the National Assembly has reached international standards that few museums in Vietnam do.