What was filed
The pied-à-terre tax has its first courtroom test. On Friday, August 7, three New York City homeowners — Simon Hedley, Rachel O'Brien and Carmine Morano — filed a petition in state court on Staten Island against Mayor Zohran Mamdani and Finance Commissioner Richard Lee over the rollout of the non-primary residence surcharge, according to reporting by CBS New York, CNN, Bloomberg and NY1.
The petitioners say the city wrongly identified their homes as potentially subject to the surcharge even though the properties are their primary residences, and argue the administration required owners to prove they don't owe a tax the city never properly determined they owed, per CNN's account of the filing.
What the petition asks for
Per CBS New York's summary of the relief sought, the petition asks the court to:
- Declare the "you may be subject" notices — roughly 17,000 of them, per the reporting — legally void;
- Declare the city's online lookup database of roughly 900,000 records unlawful and order it removed from the Department of Finance's website;
- Pause any requirement for homeowners to respond to the notices while the case is pending;
- Delay enforcement of the surcharge until a lawful implementation process is completed.
What it does not do
The petition does not ask the court to strike down the pied-à-terre tax itself — it targets how the city implemented it, not the statute. The broader constitutional challenge that law-firm commentary has anticipated — built on New York's uniformity principle — remains unfiled. Our legal challenges tracker follows both.
Where that leaves owners
The filing itself pauses nothing — that is among the things the petition asks the court to do. As of publication, DOF's published deadlines remain in effect: the response date printed on each notice, and the extended September 18, 2026 exemption-application deadline, which DOF lists for homes, condos and co-ops alike and which the Mayor's August 1 announcement said "applies to everyone who received a notice." Owners whose letter dates have passed still fall under that published extension. How the process works, step by step: the notice playbook.
If the court later pauses response obligations, that changes the calendar for everyone — we will update the tracker, this news desk, and our phone line the same day.
The number the entire dispute runs on is DOF's market value for each unit — our free checker shows yours, with its source.
Sources
- CBS New York — Lawsuit seeks to delay NYC's pied-à-terre tax, saying the rollout was botched
- CNN — NYC homeowners file lawsuit challenging rollout of Mamdani's pied-à-terre tax
- Bloomberg — NYC homeowners sue over pied-à-terre tax rollout
- NY1 — Lawsuit filed against Mamdani administration's rollout
- Gothamist — New lawsuit slams pied-à-terre tax for creating "mass confusion"