Nassau County, FL Fire Regulations: Smoke Detectors (2026)

5 spells out the minimum plan review criteria the Building Department applies to every permit application. For one- and two-family dwellings and townhouses up to three stories built to the Florida Building Code, Residential, the reviewer's checklist runs through site requirements, fire-resistant construction where required, egress, structural details and accessibility, and item 3 on that residential list specifically requires the plans to show fire, smoke and/or carbon monoxide alarm and detector locations. That means a homeowner or contractor cannot get a new-construction or major-alteration permit approved without first marking exactly where the smoke and CO devices will go on the floor plan, not simply asserting that the finished home will comply.

5, item 3. The requirement applies alongside the broader egress and fire-resistant construction items on the same list, so a plan is reviewed as a whole: the alarm and detector locations sit next to egress window sizing and stair construction requirements on the same residential-plan checklist, reflecting the code's expectation that life-safety systems are coordinated rather than treated as an afterthought.