3411.8.7 Accessible dwelling or sleeping units. Where Group I-1, I-2, I-3, R-1, R-2 or R-4 dwelling or sleeping units are being altered or added, the requirements of Section 1107 for Accessible units apply only to the quantity of spaces being altered or added.
In new construction, the number of Accessible units is required in many types of facilities. The number of Accessible dwelling units and sleeping units provided determines the number of Accessible units, and starts when only one unit is provided (see Table 1107.6.1.1). The number of Accessible units required increased based on the anticipated need (see Section 1107).
This section sets forth the rate for providing Accessible dwelling or sleeping units in Groups I-1, I-2, I-3, R-1, R-2 and R-4 when such facilities are altered or have units added (i.e., additions, change of use, change of occupancy). Assuming that Accessible units are not already provided, the number of Accessible units to be incorporated into each alteration is based on the number being altered. For example, if a nursing home was being altered a portion at a time, 50 percent of the units being altered each time would be required to be wheelchair accessible. It is not the intent that all units being altered are required to be Accessible until 50 percent of the units in the entire facility are accessible. The total number of Accessible units in the facility is not required to exceed that required for new construction, as indicated in Section 3411.3. It is unreasonable to require a greater level of accessibility in an existing building than is required in new construction.
3411.8.8 Type A dwelling or sleeping units. Where more than 20 Group R-2 dwelling or sleeping units are being added, the requirements of Section 1107 for Type A units apply only to the quantity of the spaces being added.
Type A units are required in new construction when 20 or more apartments (including condominium style) are constructed on a site. Group R-2 requirements for Type A units would also include convents and monasteries with 20 or more sleeping units and could include some townhouse style units (see definition for "Townhouse" in Chapter 2 and Section 310.1).
This section sets forth the rate for providing Type A dwelling or sleeping units in Group R-2 facilities when more than 20 units are added either in an addition or changing the function of a space (i.e., a change of occupancy, such as creating apartments in an old warehouse, increasing the number of apartments by changing a storage area to apartment units or reconfiguring larger units into smaller units). Assuming that Type A units are not already provided, the number of Type A units required is based on the number being added. For example, if a story was being added onto an apartment building, the number of Type A units required would be based on the number of units in the new story, not the number of units in the entire building. If Type A units are provided, the total number of Type A units in the facility is not required to exceed that required for new construction, as indicated in Section 3411.3. It is unreasonable to require a greater level of accessibility in an existing building than is required in new construction.