Will the disabled person who prays in his home due to a legitimate Shar'i excuse be rewarded with twenty-seven degrees, like one who prays in the mosque?

If you are unable to attend congregational prayer and cannot perform it in your home, yet you were diligent in observing it when healthy, then it is hoped that you will be rewarded as if you had performed it. The Prophet, peace and blessings be upon him, said: "If a servant falls ill or travels, what he used to do when he was healthy and resident will be recorded for him." This hadith applies to one who was performing an act of obedience but was prevented from it, and whose intention was to continue performing it.