CHAPTER 8. ADDITIONS

801.0 General Requirements
802.0 Heights and Areas
803.0 Structural Loads
804.0 Smoke Detectors in Use Groups R-3 and R-4
805.0 Accessibility
806.0 Energy Conservation

801.0 General Requirements

801.1 -- An addition to a building or structure shall comply with the building, plumbing, electrical, and mechanical codes, without requiring the existing building or structure to comply with any requirements of those codes or of these provisions.

801.2 -- An addition shall not create or extend any non-conformity in the existing building to which the addition is constructed with regard to accessibility, structural strength, fire safety, means of egress, or the capacity of mechanical, plumbing or electrical systems.

801.3 -- Any repair, renovation, alteration or reconstruction work within an existing building to which an addition is being made shall comply with the requirements of Chapters 3, 4, 5 and 6 respectively of these provisions.

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802.0 Heights and Areas

802.1 -- No addition shall increase the height of an existing building beyond that permitted under the applicable provisions of Chapter 5 of the Building Code for new buildings unless fire separation as required in the Building Code is provided.

802.2 -- No addition shall increase the area of an existing building beyond that permitted under the applicable provisions of Chapter 5 of the Building Code for new buildings unless fire separation as required in the Building Code is provided.

Exceptions:

1. Existing one and two story buildings shall be permitted to be expanded beyond what is permitted by up to 25 percent of the existing floor area, not to exceed an area of 125 percent of that permitted by the Building Code, without providing fire separation.

2. Infilling of floor openings, non-occupiable appendages such as elevator and exit stair shafts, and the addition of mezzanines and equipment penthouses shall be permitted beyond that permitted by the Building Code.

802.3  Fire Protection Systems -- Existing fire areas increased by the addition shall comply with Chapter 9 of the Building Code.

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803.0 Structural Loads

803.1 -- An addition shall not impose loads which would cause the existing building to be subject to stresses exceeding those permitted by the Building Code.

803.2 -- An addition shall not increase the stress in any structural element of the existing building or structure by more than 5 percent, unless the increased stress on the element is still in compliance with the Building Code for new structures.

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804.0 Smoke Detectors in Use Groups R-3 and R-4

804.1 -- Whenever an addition is made to a building or structure of Use Group R-3 or R-4, hardwired, interconnected smoke detectors meeting the requirements of the Building Code shall be installed and maintained in the addition.

804.2 -- Whenever an addition is made to a building or structure of Use Group R-3 or R-4, the existing building shall be provided with smoke detectors as required by the Building Code. The smoke detectors are not required to be interconnected.

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805.0 Accessibility

805.1 -- Additions shall comply with the accessibility requirements in the Building Code.

New Jersey, in an effort to develop a complete code applicable to rehabilitation of existing buildings, has undertaken to extract the relevant accessibility requirements from its Building Code. The following requirements based on New Jersey's draft are included for reference: "1 -- All work in the addition shall comply with the requirements of Chapter 11, Accessibility, of the building code, where applicable. "2 -- The addition shall include an accessible entrance unless the building code requirements for accessible entrances have been met. "2.1 -- If the only accessible entrance to the addition is located in the existing building or facility, at least one interior accessible route shall provide access through the existing building or facility to all rooms, elements, or spaces in the addition. "3 -- If there are no toilet rooms in the addition, and if accessible toilet facilities are required by the building code, accessible toilet facilities shall be provided in the existing building."

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806.0 Energy Conservation

806.1 -- Additions to existing buildings or structures may be made to such buildings or structures without making the entire building or structure comply with the requirements of the Energy Code. The addition shall conform to the requirements of the Energy Code as they relate to new construction only.

This is based on the 1995 CABO Model Energy Code.

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