The provisions of this chapter shall control the alteration, repair, maintenance and operation of existing building sites and the alteration to building site improvements. Chapter 11 applies where building site improvements are being made, or where additions are made to, or changes of occupancy occur within, the existing buildings on the site.
Building sites shall be operated and maintained in conformance to the code edition under which the site improvements were installed. The owner or the owner’s authorized agent shall be responsible for the operation and maintenance of building sites. To determine compliance with this section, the code official shall have the authority to require a building site to be reinspected. The requirements of this chapter shall not provide the basis for removal or abrogation of protections or systems from existing building sites.
Alterations and repairs to building sites shall comply with the provisions of this code unless provided otherwise in this chapter. Where differences occur between the provisions of this code and the provisions of other locally adopted land use, zoning or site development regulations, the provisions of the most restrictive code or regulation shall apply.
Building materials used for building site development shall comply with the requirements of this section.
Materials and systems already in use on a building site in compliance with the requirements or approvals in effect at the time of their installation shall be permitted to remain in use unless determined by the code official to be unsafe or dangerous. Where such conditions are determined to be unsafe, they shall be mitigated or made safe.
Existing buildings and site improvements located within or located closer to protected areas than permitted by Section 402.1 but that are in compliance with the requirements or approvals in effect at the time of their installation shall be permitted to remain in use unless determined by the code official to be unsafe or dangerous. Where such conditions are determined to be unsafe or dangerous, they shall be mitigated or made safe.
Except as otherwise required or permitted by this code, materials, assemblies, configurations and systems permitted by the applicable code for new construction shall be used. Like materials shall be permitted for repairs and alterations provided a hazard to life, health or property is not created. Hazardous materials shall not be used where the code for new construction would not permit their use at building sites of similar occupancy, purpose and location.