How to work out the zakaah for commercial companies

He put his building up for sale and sold it a year later. Does he have to pay zakaah on it?

He has a piece of land that is the subject of a dispute with the municipality and he cannot sell it. Does he have to pay Zakaah on it?

He has invested money in the investment fund; how should he pay zakaah?

Does zakah have to be paid on all bought land?

A contractor who owns real estate and building equipment; does he have to pay zakaah?

If the land does not sell, is zakah due on it?

It is not permissible to estimate anything other than fruits

Zakaah on shares

Zakah on shares in real state companies