This chapter is not intended to abrogate or annul any ordinance, rule, regulation, permit, easement, covenant, or other private agreement previously adopted, issued, or entered into and not in conflict with the provisions of this chapter.

However, where the regulations of this chapter are more restrictive or impose higher standards or requirements than other such ordinances, rules, regulations, permits, easements, covenants, or other private agreements, the requirements of this chapter shall govern.