Conditions.

An improvement to any real property used solely for residential purposes as a one-, two- or three-family residence shall be exempt from taxation to the extent of any increase in value attributable to such improvement if such improvement is used for the purpose of facilitating and accommodating the use and accessibility of such real property by a resident owner of the real property who is physically disabled or a member of the resident owner's household who is physically disabled, if such member resides in the real property.