Chapter 18.26 RESIDENTIAL DENSITY BONUS, CONCESSIONS, AND INCENTIVES This chapter is included in your selections. Sections: 18.26.010 Purpose. 18.26.020 Definitions. 18.26.030 Applicability. 18.26.040 State Density Bonus and Affordable Housing Concessions and Incentives. 18.26.050 Application and Review. 18.26.060 Density Bonus Housing Agreement. 18.26.070 Enforcement.