1-53-6.15. Primary use.
(a) Additional living units in single-family residential districts. Except as provided by the following subsection or by specific provisions elsewhere in this code, no individual parcel of land in a single-family residential zoning district shall be permitted for more than one permanent residential structure or mobile home.
(b) Medical hardship.
(1) A mobile home constituting a second living unit on one parcel may be permissible by special permit in any district permitting mobile homes, [or] a guest cottage or garage apartment in other districts where additional living accommodations are necessary and a clearly demonstrated medical hardship prevails upon an immediate family member of the head of the household.
(2) The immediate family is defined for this subsection as father, father-in-law, mother, mother-in-law, daughter, daughter-in-law, son, son-in-law, sister, sister-in-law, grandparents, step relations (relationship through the previous marriage of a spouse or through the remarriage of a parent rather than by blood) and certain other persons for whom the head of the household has been appointed legal guardian. The medical hardship must be substantiated with a written certification from a duly licensed physician that a medical hardship exists and that such hardship requires constant or recurring physical care and assistance. This hardship requires constant or recurring physical care and assistance. This hardship shall be subject to annual review and shall be discontinued when the hardship no longer exists. Should the hardship cease to exist prior to annual review it shall be the responsibility of the applicant to notify the zoning director immediately.
(3) The mobile home shall be removed within 60 days after the expiration of a special exception or cessation of the hardship.