CO HB1036

Counties and municipalities may impose excise taxes or additional property taxes on vacant residential properties after voter approval, with taxes structured as flat rates or based on unit type, bedrooms, or square footage

"Vacant residential unit" is defined as residential property unoccupied for a locally-determined period of time, excluding licensed short-term rentals

Two or more local governments with shared or contiguous boundaries may form a Local Housing Tax Authority through intergovernmental agreement to jointly establish, levy, collect, and enforce vacant property taxes

All revenue collected must be used exclusively for affordable, attainable, or workforce housing as defined by the local government, and must align with housing needs assessments where required

County assessors have no mandatory duty to implement these taxes but may voluntarily assist with data and enter into compensated intergovernmental agreements