All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
Zakah is not due on the pieces of land referred to because they are not trade commodities. For further information, please refer to Fatwa 96293 which clarifies that no Zakah is due on land purchased for building on it rather than for trade; and Fatwa 90450 which clarifies that Zakah is due annually on the land purchased for the purpose of trade.
Allaah Knows best.