No, there is a maximum of 4 per household, with 2 individuals caring for 2 patients each. It's like this;
1 person can grow for themselves and 2 others in a single dwelling, 2 persons can grow for a maximum of 4 patients under 1 roof, This includes themselves ie. Sir.G grows for himself and 2 other patients, assuming sir.g is marries or with spouse, his spouse can add 1 additional patient under her totaling 4 production licenses under 1 roof.