The primary premise is that prayer should be offered in the Masjid which is why Masjids were built. The Prophet (Sallallahu Alayhi Wasallam) said: Whomever hears the call to prayer but does not react has no prayer (i.e., his prayer is not perfect) unless he has a reason. (Tirmizi) It is compulsory therefore for the one who hears the call to respond and pray in the Masjid in congregation. It is necessary to worship in a congregation, and this congregation should take place at the Masjid. It is acceptable to worship at the workplace if the Masjid is too far away.