Is it preferable to offer Al-Sunan Al-Rawatib (supererogatory acts that were stressed and regularly performed by the Prophet) in the Masjid (mosque) or at home?
It is preferable to offer supererogatory Salah (prayer) whether Al-Sunan Al-Rawatib or others at home except what is intended to be performed in the Masjid as Tahiyyat-ul-Masjid (two-unit Prayer to salute the mosque). It was authentically reported that the Prophet (peace be upon him) said:
"Observe some of your Salahs in your houses and do not make them like graves."
The Prophet (peace be upon him) also said:
"The Salah a man offers in his house is more excellent than any other Salah performed in the Masjid except for the obligatory one."
However, Salah that is intended to be performed in congregation such as Tarawih (special supererogatory night Prayer in Ramadan) and Salat-ul-Kusuf (Prayer at the time of a solar eclipse) should be performed in the Masjid, and likewise Salat-ul-`Eid (the Festival Prayer) and Salat-ul-Istisqa' (Prayer for rain) that are to be performed in Musalla (a place for Prayer).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.