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.
Islamic jurists held different opinions as to whether someone who owns nothing but a house or money set aside to own a house is required to perform Hajj.
Maaliki scholars held that such a person is required to perform Hajj and must sell the house and use the money to perform Hajj. Shaafi‘i and Hanbali scholars held that such a person is not required to perform Hajj unless this house or the money he set aside for it is in surplus to his needs.
Hanafi scholars held that he is not required to sell the house even if it is in surplus to his needs.
The preponderant opinion is that such a person is not required to perform Hajj unless the house or money set aside for it is in surplus to his needs.
Hence, you are not required to perform Hajj and you may postpone it if you need this house, provided that you build it according to what is needed and no more than that.