ANSWER:

The prayers are valid but he is sinning if the masjid is within his vicinity and he does not pray there without any valid reason. 

if a person prays 2 or 3 prayers at home…(intentionally or unintentionally)and rest of the prayers in masjid.Are prayers which he offers at home valid?Thank you..

Prayer | September 22, 2018 2:05 am
Previous

To attain complete reward of the Ishraq prayer, is it compulsory to sit in the same place where one has offered congregational Fajr prayer or remaining in the same Masjid (i.e changing place with in the premisis of the Masjid), remembering Allah Almighty and then offering 2 Rakat is enough?
Next

Sometimes when i am out i have to pray at public places..should i take off my niqaab or pray with it if there are men around?