A great reward for building a mosque is being granted a palace in Jannah. The role of the masjid is to help people learn more about Islam and to nurture their moral and spiritual development. By building a masjid you will not only earn the reward of providing a community with a house of Allah, but your Sadaqah Jariyah will continue giving benefit for generations to come in sha' Allah.
The Prophet Muhammad (ﷺ) even helped in the construction of the first mosque in Medina, as it was part of his will to define a place of worship for Muslims everywhere. Building a mosque is a wonderful act of Sadaqah Jariyah
