Two into one: combining flats can be complex issue in Hong Kong
Joining flats together requires time and patience as there are structural issues that need to be addressed
Kenny Tse is a director at Raymond Chan Surveyors. He talks about regulations relating to combining two flats into one
I want to combine two flats on the same floor into one home. Is this possible? What planning issues would I have to consider?
To convert two flats into a single dwelling, the first thing you would need to know is if the units are structurally safe to combine. You will need to appoint an authorised person, such as a building surveyor, structural engineer or architect, to look at the original plans and discern where the structural load-bearing walls are, where the water and gas lines are, and the like. If it is structurally feasible, then the building professional will draw up appropriate plans and handle all the applications with the Buildings Department and site works. If a structural wall is demolished or altered, strengthening works, such as installation of steel beams, might have to be carried out. Afterwards, the new building plan will have to be submitted to the Buildings Department for proper authorisation. In some newer complexes with green-building features, each flat is designed with a balcony. If two flats are combined, there will be two balconies attached to a flat. This modification will also have to be filed with and authorised by the Buildings Department.
Is there any difference if I want to convert two floors into a duplex?
Similarly, any alteration to the structure of the premises, such as opening a hole in the floor and installing a new staircase, would have to be authorised by the Buildings Department. But if the staircase planned leads up to the rooftop terrace, a roof hatch or shelter would have to be built as access and protection from rainwater. In this case, the landlord would not only have to seek the authorisation of the Buildings Department, but would also have to apply for an “occupation permit”. Also, the new structure should not violate fire safety and building codes. For example, it cannot block fire escape routes of other residents.