What is to be done about the wife’s desire to buy a large house with a swimming pool and a garden, versus the husband’s desire for a small house with three bedrooms? And will the husband be rewarded if he buys what his wife desires? And will the saying, “You have exhausted your good things in your worldly life,” apply to him?

A Muslim should not make this world their ultimate concern. The Prophet (peace be upon him) did not fear poverty for his Ummah; rather, he feared the opening up of the world and competition over it, which could lead to destruction. Competition in worldly matters can lead to the destruction of one's faith. Whoever has the world opened up to them must beware of its evil consequences and temptation. They should not feel secure in its adornment nor compete with others.

Whoever is preoccupied with their worldly life to the detriment of their Hereafter is truly at a loss, for the Hereafter is better and more enduring. Allah Almighty has likened this world to vegetation that grows then perishes.

People may perish by competing over worldly matters, such as buying houses with usurious loans, which exposes them to Allah's wrath.

There is no reward for building houses for their own sake. Rather, the reward is for the intention of preserving and sheltering the family, not for the building itself. Building can even be a cause for sin and punishment in cases of extravagance and boasting.

Building a house with the intention of showing off and extravagance is blameworthy. However, if it is for a legitimate purpose, such as a family's need or providing housing for the needy, then there is no harm in it.

The owner of a dwelling is rewarded for building it if they spend seeking Allah's pleasure. As for boasting and extending in construction, there is no good in it other than wasting money.

Therefore, it is not permissible to buy a house from prohibited sources. There is no reward for merely building a house except with the intention of sheltering one's family, and it is not permissible to build with the intention of boasting and showing off. There is no objection to a house including facilities such as a swimming pool or a garden if it is without extravagance, as a spacious dwelling is a source of happiness. The cost of construction and the purchase price determine whether it is extravagant, based on the owner's financial situation. Extravagance is exceeding the limit and varies from person to person.