A Chinese man has spent six years building his dream mountaintop villa – on top of a Beijing apartment block.

Eccentric Professor Zhang Lin shifted tons of rubble and rock onto the roof of the building to construct the outrageous home which looks like it has been carved from a mountainside.

The property even has a rocky mountain garden, complete with rubble and shrubbery.

But his distraught neighbours are less than impressed with the project and fear the building is about to collapse.

The rooftop home, which never received planning approval, has caused cracks to appear in his neighbours’ ceilings and walls while some have had to put up with leaks from broken pipes and drains.

They have also been forced to live with the noise and disturbance caused from the building work.

One resident said their apartment is constantly flooded while another described the academic as a ‘menace’.

Mr Lin could now be ordered to tear down his mountain penthouse if it is deemed unsafe.

‘It has come to our attention that Professor Zhang did not apply for permission for this structure. So unless he can prove it is safe, it will have to come down,’ explained an city official.