MO HB3297

Political subdivisions must allow multifamily and mixed-use residential development in commercial, industrial, or mixed-use zones if at least 40% of units remain affordable for at least 30 years

Local governments cannot restrict density below the highest allowed density in their jurisdiction, nor restrict height below the highest allowed within one mile or three stories, whichever is higher

Qualifying developments must be administratively approved without requiring zoning changes, variances, special exceptions, or comprehensive plan amendments

Multifamily projects with more than 70 affordable units qualify for property tax exemptions: 100% exemption for units housing families at or below 80% of area median income, 75% exemption for units housing families between 80-120% of area median income

Improper exemption claims trigger penalties of 50% of unpaid taxes plus 15% annual interest; provisions take effect for tax year 2027