The following uses are permitted in the O-R District:
a.
Single-family residential use as permitted and regulated in the R-1 Residential District.
b.
Single-family and two family residential use as permitted and regulated in the R-3 Residential District and as permitted by this section.
c.
Professional office use including medical, dental or legal offices, banks and similar financial institutions, real estate offices, and other uses of similar nature as defined by this chapter.