Business and Professions Code § 10240.2

As used in this article, “ dwelling” means any of the following units which are owned by a signatory to the mortgage or deed of trust secured by the dwelling unit at the time of execution of the mortgage or deed of trust:

(a) A single dwelling unit in a condominium or cooperative.

(b) Any parcel containing only residential buildings if the total number of units on the parcel is four or less.