Somewhere in the stack of paperwork your contractor hands you before work starts, there is a form called the Notice of Commencement. It looks minor compared to the permit application and the contract, but it is one of the few documents in the entire process that exists specifically to protect you, the property owner, financially.
A Notice of Commencement is a short, standardized form that identifies the property, the owner, the contractor, and the scope of work before construction begins. It gets recorded with the county clerk's office, and a copy is typically posted at the job site near the permit card. Most building departments require it on file before they will approve a permit for anything beyond minor repairs.
It is not optional paperwork. It is part of Florida's construction lien law, and it exists to create a public record of who is legally authorized to work on your property and who is entitled to payment for that work.
Florida's lien law allows subcontractors and material suppliers who are not paid by your general contractor to file a lien against your property, even if you already paid the general contractor in full. That sounds backwards, but it is how the law is structured, and the Notice of Commencement is one of the tools used to manage that risk.
When it is properly recorded and posted, subcontractors and suppliers are expected to serve a Notice to Owner if they want lien rights, which tells you who is working on your project and who to make sure gets paid. Skip the Notice of Commencement, and that visibility disappears. You can end up paying the full contract amount to your general contractor, only to find out later that a subcontractor was never paid and has a legal claim against your home.
Your contractor usually prepares this form as part of the permit package, but you sign it as the owner, so it is worth actually reading before you do.
Once signed, the Notice of Commencement has to be recorded with the clerk of court in the county where the property sits, and a certified copy posted at the job site, visible, usually right next to the permit itself. Building departments will check for this at inspection. No posted notice can hold up an inspection on larger projects.
For small jobs under a jurisdiction's minimum threshold, you may not need one. But for anything that requires a real building permit, going without it removes a layer of legal protection you are entitled to, and some building departments will simply refuse to issue the permit at all. There is no upside to skipping it when it is required.
The Notice of Commencement is a one-page form, but it carries real legal weight. It creates the paper trail that protects you from paying twice for the same work. Read it before you sign it, make sure the details match your contract, and confirm your contractor actually records it. Do not assume it happened just because someone mentioned it.