On residential projects, subcontractors and suppliers must send a preliminary notice to the owner and prime contractor by the 15th day of the 2nd month following the month that work was performed and unpaid. (Notice must be sent for each month work was performed and unpaid.) For example, if the unpaid work was performed on any day in January, notice would be due no later than March 15th.
On non-residential projects, first-tier subcontractors and suppliers (those who contract with the prime contractor) must send notice by the 15th day of the 3rd month following each month work was performed and unpaid. For example, if work was performed in January, notice would be due no later than April 15th.
Subcontractors and suppliers who contract with anyone other than the direct contractor on non-residential projects must send a notice by both the 15th day of the 2nd month, and the 15th day of the 3rd month following each month in which work was performed and unpaid.
Note: Effective on all original contracts entered into on or after 1/1/22, the 2nd-month notice on non-residential projects will no longer be required.