Choi Hung Estate will be redeveloped in three phases, with the first batch of affected residents set to be relocated in about four years’ time, according to a paper submitted by housing authorities on Wednesday.

The redevelopment plan’s timeline for the estate built in the 1960s and famous for its rainbow colour theme was unveiled in the paper submitted to the Wong Tai Sin District Council, in which the Housing Department said the first phase would involve three blocks – Pik Hoi House, Kam Pik House and Tan Fung House – as well as two vacant school sites.

"The new Mei Tung Estate, which is expected to start taking in residents in 2028-29, will provide 2,450 units for the first phase of relocation, accommodating about one-third of the affected Choi Hung Estate residents," the paper said.

After the area in the first phase is cleared out, construction will begin immediately and it will be able to provide about 3,200 units to residents of four blocks affected by the second stage of redevelopment, expected to take place from 2035-36.

The area involved in the second phase will then be able to take care of the last batch of households. These residents will move into some 4,100 newly built units between 2042 and 2043.

The relocation process would take roughly 15 years, the department added, and by 2048, the last phase of the estate is expected to be redeveloped to offer 1,900 flats.

In total, the new Choi Hung Estate will be able to accommodate 9,200 households, up from the current 7,400.

Officials said the redevelopment would also provide an opportunity to improve traffic conditions at the Choi Hung Interchange.

“The Housing Authority has begun discussions with relevant departments to free up part of the Choi Hung Estate site to alleviate traffic congestion in the area,” the paper said.