Chapter 17.44 BASEMENTS This chapter is included in your selections. Sections: 17.44.010 Purpose. 17.44.020 Definitions. 17.44.030 Locations for Basements. 17.44.040 Floor Area Calculations. 17.44.050 Lightwells, Stairwells, and Other Excavated Features in R-1B and Smaller Lots in the R-1A. 17.44.060 Design Requirements.