Filing a mechanic’s lien in New York can be a complex process, but here are some of the most important points to keep in mind:

1. Timing: In New York, a mechanic’s lien must be filed within eight months of the last day that work was performed on the project.
2. Notice of Lien: Before filing a mechanic’s lien in New York, you must provide a “Notice of Lien” to the property owner and other interested parties, such as the general contractor or lender. This notice must be served at least 30 days before the lien is filed.
3. Lien form: In New York, there is a specific form that must be used when filing a mechanic’s lien. This form is available from the New York State Department of State.
4. Description of work: The mechanic’s lien should include a description of the work that was performed, as well as the date that the work was completed.
5. Amount of lien: The lien should also include the amount of money that is owed for the work performed, including any unpaid labor or materials costs.
6. Proper filing: The lien must be filed in the appropriate county clerk’s office in the county where the property is located. You will need to pay a fee to file the lien.
7. Enforcement: If the property owner fails to pay the amount owed, you may need to take legal action to enforce the lien. This could involve filing a lawsuit or taking other legal steps.

It’s important to note that mechanic’s liens can be a complicated legal matter, and it’s often best to seek the advice of an attorney who specializes in construction law. They can help ensure that you follow all of the proper steps and procedures when filing a lien, and can also help you understand your legal rights and options if the lien is contested or if enforcement is necessary.