Whether rental apartment buildings, residential properties with retail space or luxury apartments: regulatory interventions are noticeably altering the valuation and potential buyer base for New York residential real estate. The special levy on second homes introduced in the summer by Mayor Zohran Mamdani was projected by official estimates to channel around $500 million annually in additional revenue into municipal coffers. While political figures described the measure as a tax on absentee billionaires, the statute formally defines it as a levy.
This legal nuance is the subject of ongoing court proceedings to clarify whether the revenues may be exempted from the city's constitutional property tax limit. In addition, the methodology by which the administration identified potentially affected properties is being challenged. For the 2026-27 and 2027-28 tax years, the regulation provides for annual rates between 4 per cent and 6.5 per cent on eligible condominiums and cooperative apartments. The assessment base is the value determined by the Department of Finance, not necessarily the purchase price.
Liability risks for associations and purchasers
The model carries particular risks for housing cooperatives (co-ops). The levy for an individual unit is invoiced to the cooperative corporation rather than directly to the shareholder. If payment fails to materialise, the liability falls back upon the community of owners. Furthermore, outstanding claims, late payment penalties and interest constitute a statutory lien on the property that persists across a change of ownership. Non-profit bodies such as universities or religious organisations are also not automatically shielded from the special levy by existing tax exemptions.
Commercial office and retail components, as well as standard multi-family rental buildings in New York Building Class 2, do not fall under the new regulation. For mixed-use Class 1 properties, a case-by-case assessment is required. According to Trystan Polsinelli, Senior Executive Director at Compass Commercial, commercial units such as practices, offices or retail units, as well as multi-storey rental buildings, gain in attractiveness from this differential treatment, as they offer regular income without the tax surcharge.
Due diligence requirements in transaction reviews
Prior to entering into contracts, parties should coordinate key parameters with legal and tax advisers to avoid unexpected financial demands:
- —Cut-off date 5 January: The registered use on this date determines liability for the levy; a purchaser's mere intention to occupy or let the property in future does not discharge an existing encumbrance.
- —Tenancy agreements: If the apartment is used as a primary residence by a qualified tenant under an arm's-length agreement with a term of at least one year, this may establish an exemption.
- —Corporate structures: In the event of acquisition via trusts or LLCs, the beneficial owners as well as the actual occupants must be analysed precisely to ensure compliance with the exemption criteria.
For vendors, the new levy means setting out the status of the property transparently, while purchasers must precisely define the contractual distribution of existing liabilities. This differentiation is fundamentally shifting the composition of parties at New York negotiating tables.
