Hong Kong plans to crack down on poor-quality subdivided flats are leaving many low-income residents uncertain about their future in one of the world's most expensive housing markets.

Tens of thousands of people in densely populated, land-poor Hong Kong live in tiny dwellings made by dividing up apartments, most smaller than a parking space. It's an affordable option for students and low-income families but can also mean banging shins in cramped and in some cases substandard living spaces.

Her cramped Hong Kong home is one of four units carved out of what was once a single apartment. Most of the space is occupied by the bunk bed she shares with her husband and son, and their sleep is often disrupted by neighbors returning late or heading out early.