The Reason for naming the Ka'bah The House of Allâh'
Question :
Why was the Ka'bah named 'The Sacred House of Allâh'?
Answer:
The Ka'bah was named the House of Allâh because it is a place of magnifying Allâh, the Mighty and Majestic. Verily, the people come to it from everywhere in order to perform the obligation that Allâh has prescribed for them, which is the Hajj (pilgrimage) to His House. It is also because the people face it in their prayers in every place in order to fulfill a condition from the conditions for the correctness of the prayer.
This is as Allâh said:
"And from wherever you come, turn your face (in prayer) to the direction of the Sacred Mosque (Al-Masjid Al-Haram). And wherever you are turn your faces (in prayer) in its direction."
Allâh connected it to His Name in possessive form as a means of honoring, magnifying and respecting it. For verily, that which is connected in possessive form to Allâh (i.e., His Name) is divided into two types. Either it is an attribute from His Attributes, like the Hearing of Allâh and His Sight and His Knowledge and His Power and His Speech, or it is from His creations. And it (the creation) is mentioned in possessive connection with Him as a means of honor, like His Saying:
"And purify My House for those who perform Tawaf (circu- mambulate) around it."
Source:
Ash-Shaykh Ibn 'Uthaimin
Fatawa Islamiyah, Vol. 4 Page 302