A legally created lot that contains less area than the required minimum lot size or minimum lot width of the applicable zone district is considered a building site for any permitted use or conditionally permitted use provided one of the following criteria is met:

Flag lots may be permitted as part of a subdivision where conditions reasonably preclude direct street frontage. In such case the access strip shall be a minimum of 20 feet wide and shall not exceed one lot in depth. In calculating the lot size, the square footage in the access strip shall not be counted. The lot width shall be measured at the front setback line which is measured from the interior end of the access strip. In all cases the residence shall be sprinklered for fire safety.

The regulations applicable to each zone district shall be applied to the portion of the area within that zone district, and no use, other than the required parking serving a principal use on the site, as provided in Chapter 17.25, shall be located in a zone district in which it is not a permitted use or a use that first requires a use permit.

In every zone district the minimum lot size, lot width and yard standards for condominium developments shall be determined by the subdivision map.