Cal. Health & Saf. Code § 50665
In residential rehabilitation areas designated pursuant to Section 37921, or in conjunction with financing of residential rehabilitation outside such areas as provided in Section 37922.1 or 37924.5, a person or family of low or moderate income that is the owner of an owner-occupied one-to-four dwelling unit property may receive a deferred-payment rehabilitation loan for the excess of the cost of meeting rehabilitation standards over the amount of financing the local agency is able to provide without exceeding the owner's ability to afford the monthly payments required. Owners of rental residences may receive deferred-payment rehabilitation loans if they have agreed to limit rent increases as provided in Section 37922.5, and if such loans are necessary in addition to financing otherwise provided in order to avoid increases in monthly debt service which would result in rent increases causing permanent displacement of persons of low income residing in the residence prior to rehabilitation. Such owners may also receive deferred-payment rehabilitation loans in the amount, if any, necessary to avoid such increases in monthly debt service as would make it economically infeasible to accept subsidies available to provide affordable rents to persons of low income, if the owner agrees to accept such subsidies.
Ca. Health and Saf. Code § 50665