In addition, the Board of Appeals, in granting a special use permit under this section, may also prescribe such further conditions or restrictions with respect to both the proposed extension or remodeling and the existing nonconforming structure or use as in its opinion will increase the compatibility of the nonconforming use, as extended or remodeled, with the general neighborhood, including but not limited to landscaping, redecoration, structural improvements, manner of operation and elimination of offensive uses or procedures.