D.C. would require quarterly real estate tax payments starting July 2028

Property owners would owe four equal tax payments each year, due quarterly. The schedule would cover real estate taxes in D.C. An authorized payment plan could set a different payment schedule. The schedule would apply for the tax year beginning July 1, 2028, and each tax year after that.

Assessors would estimate land's market value as if empty and available for its most valuable suitable use. This rule would cover the land portion of D.C. property tax assessments. Similar properties with similar zoning could not receive different land values because of the presence, absence, or value of buildings or other structures. The rule would apply to assessments and updated valuations for the tax year beginning July 1, 2028, and each tax year afterward.

The Mayor would separately test land values in published studies comparing tax assessments with sale prices. Studies would cover property types citywide and within each assessment area. Land values would use the same accuracy standards as total property assessments. The Mayor would note when a study lacks enough sales data. This requirement would begin after mayoral approval or a Council veto override, a 30-day congressional review, and publication in the D.C. Register.