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.
Additions to any building site improvements shall comply with the requirements of this code for new construction. Unaltered portions of a building site shall be in accordance with the provisions of the code in force at the time of their construction.
Where additions to a building, or additions to building site improvements result in the alteration of existing portions or improvements of the building site, those alterations shall comply with this section and Section 1103.
Additions to an existing building site shall be made to ensure the following:
1.Existing building site improvements together with the additional or expanded improvements are not less conforming to the provisions of this code than the existing building site was prior to the addition; and
2.Where additions to any building reduces, or requires alteration to, building site improvements, the alterations to the building site together with unaltered site improvements shall not be less conforming to the provisions of this code prior to the addition to the building or structure.
Alterations to existing portions or site improvements on building sites shall be in accordance with the provisions of this code for those portions or building site improvements being altered. Unaltered portions and site improvements of the building site shall be in accordance with the provisions of the code in force at the time of their construction. Alterations shall be such that the existing building site is no less conforming to the provisions of this code than the existing building site was prior to the alteration.
Unaltered portions and site improvements of a building site shall be in accordance with the provisions of the code in force at the time of their construction or preservation.
Exception: Where, in the opinion of the code official, there is no significant compromise of the intent of this code, the code official shall have the authority to approve materials and assemblies that perform in a manner that is at least the equivalent of those being replaced.
Where existing hardscapes are altered, the alterations shall comply with the provisions of this code.
1.Existing hardscapes and vegetation are permitted to be replaced with materials shown in previously approved construction documents.
2.Where existing vehicle surface parking lots are altered without changing parking space configuration or increasing the number of parking spaces, the altered parking lot shall not be required to comply with Section 407.4.
3.Alterations to accessible parking spaces shall not be required to comply with Section 407.4.
Where a change in the use or occupancy of a building or tenant space places it in a different group of the same occupancy classification or in a different occupancy classification, as determined in accordance with the provisions of the International Building Code, compliance with Section 1104.2 shall be required. Altered portions of, and additions to, existing buildings and existing building sites that are not a result of change of occupancy requirements, shall comply with Chapter 10 and this chapter.
Where a change in occupancy results in an increase in the occupant load of the building, bicycle parking shall comply with the following:
1.Short-term bicycle parking spaces shall be provided in accordance with Section 407.3 equivalent to a new building of the new occupancy.
2.Where the existing building and building site have parking for motorized vehicles, long-term bicycle parking shall be provided in accordance with Section 407.3, equivalent to a new building of the new occupancy. Where the existing building does not contain covered parking spaces for vehicles, only 25 percent of the long-term bicycle parking needs to be covered.
Provisions of this code relating to the construction, repair, alteration, addition and restoration of building sites and site improvements shall not be mandatory for historic building sites, provided a report has been submitted to the code official and signed by a registered design professional, or a representative of the State Historic Preservation Office or the historic preservation authority having jurisdiction, demonstrating that compliance with that provision would threaten, degrade or destroy the historic nature of the building site. This section shall not apply where the authority having jurisdiction for environmental safety determines the building site constitutes a distinct environmental hazard.