I Blocks [1] are a design of public housing in Hong Kong. It is mainly divided into three variants: Single I, Double I, and Triple I. Only a few estates currently have I blocks as of today. The existing blocks were built between 1981 and 1983.
The I block can be divided into three variants: Single I, Double I, and Triple I.
The building looks like the letter I. There are three wings - two long and one at the middle. It can be modular by connecting another or two more I blocks. This gave birth of Double I and Triple I.
Unlike other blocks, Double I blocks are only given one name. Such examples include Mei Fung House in Mei Lam Estate and Shek To House in Shek Wai Kok Estate.
The first I blocks was completed in 1981, located at Sun Tin Wai Estate. (Shing Wai House, Foo Wai House, Yan Wai House, Fung Wai House, Wing Wai House) The first Double I buildings are located at Shun Tin Estate, completed about the same as shown above. The last I blocks to be built are located at Chak On Estate, completed in 1983.
Usually, the height of I blocks may vary. (14-21 stories) Only medium and large units are provided inside the block. (32-39 sqm) Therefore, in public housing estates, it is built with Old Slab to balance the size of units.
Due to the I block taking a lot of space and units focusing on only one size, the I block was stopped being built in future projects. Therefore, few currently have I blocks as of today.
The I blocks take up a large amount of space. Therefore, most are found in the new towns of Sha Tin, Kwun Tong, Sham Shui Po, and Tsuen Wan.
| District | Estate | Stories | Units per floor | Completed | Notes |
|---|---|---|---|---|---|
| Sham Shui Po | Chak On Estate | 14 | 27 | 1983 | Last I block in Hong Kong. |
| Lai Kok Estate | 14 | 81（27x3 blocks） | 1981 | Triple I (given one name) | |
| Kwun Tong | Kai Yip Estate | 14 | |||
| Shun Tin Estate | 21 | 54（27x2） | Double I block (one name) | ||
| Tsuen Wan | Shek Wai Kok Estate | 21 | 54 | 1982 | |
| Sha Tin | Mei Lam Estate | 1981 | First Double I block in Hong Kong. | ||
| Sun Tin Wai Estate | 21×5 | 27×5 | Location of the first I blocks in Hong Kong. | ||
| Total：12 houses (18 blocks) |