According to the U.S. Fire Administration’s Nonresidential Building Fires report, smoke alarms were not present in an estimated 50% of larger, nonconfined fires in occupied nonresidential buildings. Automatic sprinklers, full or partial, were present in only 22% of those same fires. That means in the majority of commercial fires serious enough to make the national data, the building either had no detection or the fire outran what was there.
This is the newest full breakdown of its kind. The USFA report covers 2017 to 2019 data and was published in December 2021. As of mid-2026, USFA has not put out a newer report with this level of device-by-device detail, and its own report index still lists this one as current. The number is not stale by accident; it is the best the federal data has, and it is worth reading as a baseline rather than a headline from last year.
For a Kentucky building owner, the useful question is not what the national rate was in 2019. It is whether your own building would have landed on the right side of that 50/50 split if a fire started there tomorrow. The code that governed your building’s detection and suppression requirements was written for the building as it existed when it was permitted. If the layout, occupancy, or use has changed since, the coverage installed then may not match what the space needs now.
Vacant and idle buildings are the worst case
The same USFA report found that only 3% of fires in unoccupied nonresidential buildings had smoke alarms that were both present and operating. Unoccupied covers buildings that were vacant, under construction, or undergoing major renovation at the time of the fire. Those buildings were not a small slice of the problem: buildings not currently or routinely occupied accounted for an estimated 24% of all nonconfined nonresidential fires in the study period, according to the same USFA report.
The pattern makes sense once you think through how a building goes idle. A tenant moves out and the space sits empty while it’s marketed. A renovation stalls. A seasonal facility shuts down for the off months. Nobody is walking those spaces daily, so a monitoring gap that would get caught in an occupied building goes unnoticed. The fire risk does not go down when the people leave. Idle buildings still have electrical systems, sit through storms, and attract entry they were not designed for. What goes down is the chance that a working detection system is watching when something starts.
The ten-year trend in nonresidential fire deaths
According to USFA’s Nonresidential Fire Estimate Summaries, 2023 saw an estimated 110,000 nonresidential building fires nationally, causing 130 deaths, 1,200 injuries, and $3,164,400,000 in direct property loss. Over the ten years from 2014 to 2023, nonresidential fires rose 19%, and deaths rose 70% (93% if the 2016 Oakland “Ghost Ship” fire, which killed 35 people, is pulled out of the trend). Injuries fell 14% over the same period, and inflation-adjusted dollar loss rose 10%. There were 9 multifatality nonresidential fire incidents in both 2022 and 2023, up from 5 in 2021.
A rising death count alongside a falling injury count is worth sitting with. Fewer people are getting hurt and walking away, but more are dying. That shift is consistent with what happens when detection and early warning are missing: a fire that would have been caught and evacuated at the injury stage instead runs long enough to become fatal.
Those are nonresidential numbers only. For national scale across every fire type, NFPA’s Fire Loss in the United States During 2024, published in November 2025, counted an estimated 1.39 million fires, 3,920 civilian deaths, and $19.1 billion in direct property damage in 2024. Nonresidential buildings are one slice of that total, and the slice a commercial owner has any direct control over.
Structure fires are the category where this plays out. According to the National Fire Sprinkler Association’s analysis of NFPA and NFIRS data, structure fires make up about 35% of all U.S. fires but account for 77% of civilian fire deaths and 83% of dollar loss. Detection and suppression systems are built for exactly this category of fire. When they are missing or not working, the building is exposed to the fires that do most of the damage.
How Kentucky compares
According to USFA’s Kentucky Fire Loss and Fire Department Profile, based on 2023 data reported by 466 Kentucky fire departments, Kentucky recorded 3.4 fire deaths per 1,000 fires across all fire types, against a national average of 2.1 deaths per 1,000 fires. Kentucky’s injury rate, 4.7 per 1,000 fires, ran below the national rate of 6.4, so fires here are somewhat less likely to injure someone but more likely to kill them when they do.
The mix of fatal fires differs too. Structure fires, residential and nonresidential combined, accounted for 63.6% of Kentucky’s fire deaths, compared with 73.1% nationally, and Kentucky’s fatal-fire mix leans harder toward vehicle fires (31.8% of deaths, versus 22.7% nationally) than the rest of the country’s. None of that changes the core fact for a commercial building owner: when a structure fire in Kentucky turns fatal, it is happening at a higher rate per fire than the national average. A building without working detection is not protected by living in a state with fewer fires overall.
A self-audit for your own building’s detection coverage
You do not need a consultant to find out where you stand. Pull what you already have and check it against what is in the building right now.
Start with the last inspection or test report on file, not the cover page summary but the device list. Does it show every area of the building, or only the areas someone happened to check? A report that says “smoke detection: pass” for the whole building without listing zones or device locations is not telling you anything about coverage, only that someone signed a form.
Walk the building against a current floor plan, not the one from when the system was installed. Note every part of the layout that has changed since: a warehouse bay converted to office space, a mezzanine added for racking, a tenant that subdivided open floor area into rooms. Detection density that made sense for the original layout does not automatically follow the space when the space changes.
Check the occupancy status of every part of the building right now, not just the parts you use daily. If any section sits vacant, is under renovation, or only runs seasonally, ask directly whether that section has working detection. The national data above says this is exactly where coverage most often disappears.
Look at how the system reports a signal. Does it go to a monitored station, or only to a local horn and strobe that someone has to be present to hear? A building that is fully occupied during the day but empty at night depends on which of those two you have.
Finally, check the date the system was last tested against the date it was last modified for a layout or use change. A test date alone does not tell you whether the system still matches the building it is protecting.
What triggers a required upgrade
A few events reliably bring detection and suppression requirements back into play, even on a building that has not had a fire alarm problem in years. A change in occupancy classification, such as a warehouse converting part of its floor to assembly or retail use, triggers a code review of what detection that use requires. An addition or a renovation large enough to need a building permit does the same, because the permitting process checks the building against current code, not the code in force when it was originally built. Adding square footage past a jurisdiction’s threshold can do it as well. And when a local authority having jurisdiction adopts a newer edition of the fire and life safety codes, buildings undergoing any of the above are often required to bring existing systems forward to the new edition rather than being grandfathered indefinitely.
None of these triggers announce themselves. They surface during a permit application, an insurance renewal, or a fire marshal walkthrough, usually after the change has already been made.
What this looks like when handled well
Versys, LLC has done fire alarm work in Kentucky and Southern Indiana that ranges from small riser monitoring systems to full replacements in facilities up to 1 million square feet, and design-build is how most of that work starts: matching the system to the building as it exists now, not as it existed on the original permit set. Inventory is tracked device by device with Building Reports barcode software, so an owner gets a report that shows what passed, what failed, and what is missing, the same level of detail this post argues you should be checking for in your own paperwork.
If your last inspection report cannot answer the questions in the self-audit above, that is the starting point. Call Versys at (270) 358-2200 and have your current coverage walked against your building as it stands today.
