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 is His slave and Messenger.
If the deceased did not leave any heirs except those mentioned in the question, then the estate will be divided among the son and the daughters, the male getting twice the share of the female. Based on that, the estate should be divided into 5 shares; two shares for the son and one share for every daughter.
If the stated house cannot be divided, then it can be sold and its price is to be divided among the heirs according to everyone's share or that some of the heirs can take it and financially compensate the others for their shares, or they may leave it commonly owned among themselves, using it and sharing its returns according to their shares, i.e. two shares for the son and one share for every daughter. Also, they may agree among themselves on dividing it in a way that suits them and achieves their interests. The same thing applies to the land if it cannot be divided.
Anyway, there is nothing wrong regarding all those options for they are not obliged to divide it in a certain way unless there is a dispute and disagreement among them and in that case the matter should be raised to the Islamic judge to settle it for them.
Allaah Knows best.