The masjid is the heart of any Muslim community. Providing much more than a place of worship, many offer education and are a base from which essential community services are delivered.

The first and foremost duty performed by the Messenger of Allah SallAllahu ‘alayhi wasallam upon entering Madinah was to build a Masjid.

‘Whosoever builds a house (masjid) for the pleasure of Allah, whether it be small or large, Allah builds for him a house in Paradise.’
[Tirmidhi]

Ummah Welfare Trust builds new masjids or reconstructs damaged masjids in several countries. You can donate the whole cost of the masjid or part of it.

It is an excellent form of Sadaqah Jariyah as the donor can expect to receive rewards as long as people worship there.

https://uwt.org/projects/masjid-construction/