Duval County / Jacksonville is the largest city by area in the contiguous United States and one of Florida's highest-volume jurisdictions for Notice of Commencement filings. Florida law (Fla. Stat. § 713.13) requires a recorded Notice of Commencement for most direct contracts over $2,500 — recorded with the Duval County Clerk of the Circuit Court in Jacksonville, and posted on the jobsite before the first inspection.