Multi-family housing, which is defined to include existing apartments, townhomes, and condominiums, shall be subject to the following additional provisions:

1. All external modifications of existing multifamily. units shall be subject to the provisions of this code.
2. The board of zoning appeals shall have exclusive jurisdiction and authority to grant a conditional use permit for the external modification of multi-family housing, including all accessory buildings, structures, parking areas, walkways, entrances, exits and driveways. The board shall authorize such a permit only if it is the finding of the board that such proposed use and/or buildings will not impair an adequate supply of light and air to adjacent property, materially increase the congestion of public streets, increase the public danger by reason of fire, impair the public safety, impair the public health by creating a smoke nuisance, materially diminish or impair established property values within the surrounding area, or in any other respect impair the public health, safety, comfort, morals, and welfare of the community.
3. The board of zoning appeals may require, in addition to the specific requirements of the applicable ordinances, as a condition for the approval of a permit, such provisions and safeguards as will preserve the integrity and character of the city, and will prevent the proposed use from imposing any undue financial burden upon the City. 
4. Where application is made for a permit for external additions, alterations or changes to an existing multi-family structure, such application shall be accompanied by a site plan drawn to scale showing the actual dimensions of the parcel of land to be built upon or used, the size of the building to be erected or converted, the position of the proposed or existing building upon the lot, the position of any future contemplated or projected buildings to constitute a part of said multi-family structure, the position and dimensions of any existing and proposed parking area, and other information as may be deemed necessary by the planning director, or by the board of zoning appeals, for consideration of the application. Such application, together with the supporting documents and information furnished by the applicant, shall be filed with the planning director who shall transmit the same for consideration to the board of zoning appeals.
5. Nothing in this appendix or the adoption of this appendix shall be read to authorize the construction of any new or additional multifamily structures within the City.