Offering plan

An offering plan is the disclosure document a sponsor must file with the state attorney general before selling cooperative or condominium interests: the building's condition, the deal's economics, the sponsor's obligations, unit details, and the risks — amended over time as facts change, and declared effective when sales thresholds are met. It is the founding prospectus of every co-op and condo.

Analytically, offering plans and their amendments are dense primary sources: construction and conversion history, sponsor identity, financial projections against which the building's reality can be compared, and — in conversions — the tenant-protection and occupancy facts of the transition era. For sponsor-controlled buildings, the amendment trail documents what remains unsold and who still holds the obligations.