Chapter 18.31 ADDITIONAL REQUIREMENTS IN THE NC, NEIGHBORHOOD COMMERCIAL ZONE This chapter is included in your selections. Sections: 18.31.010 Purpose. 18.31.020 Minimum Lot Area. 18.31.030 Setbacks. 18.31.040 Maximum Height of Structures. 18.31.050 Allowed Residential Density. 18.31.060 Landscaped Areas. 18.31.070 Service Areas. 18.31.080 Exterior Light Regulations. 18.31.090 Sign Design Standards.