What is Islam's view on constructing elaborate mansions which is the norm with affluent people?

Answer

Regarding palatial mansions, the Qur'aan Majeed states: "What! Do you construct palatial mansions as if you are going to live forever (in this world)?" Casting aside fiqhi technicalities, this Aayat should be an adequate response for the people of intelligence. The healthy heart of a Muslim is a sufficiently qualified Mufti to answer your question. Rasulullah (Sallallahu alayhi wasallam) said: "Seek a fatwa from your heart." Life on earth is a practical affair which requires practical implementation of the Sunnah with its culture, norms, attitude and ethos.

Since we lack understanding of the shortness of earthly life and the reality of the Aakhirat, we conduct ourselves as if we shall be living in this dunya perpetually. When Maut will stare man in his face, only then will his eyes of the heart open up to understand the reality. But, alas! It will then be too late. The money and the mansions will be left behind.

The Mu'min is required to build palatial mansions in Jannat by means of his Ibaadat and Taa-at (Obedience). The Mu'min is required to reflect on the misery and hardship of millions of Muslims who are living in squalor and poverty in shacks, hovels and under plastic sheeting in extreme weather conditions. He will then also understand the waste, futility, his insensitivity and destructiveness of his palatial mansion. "Take lesson! O People of Intelligence!" (Qur'aan)