Adding fire sprinklers to a building that wasn’t originally built with them is a different project than new construction, both in cost and in what it takes to get through it. Here’s what to expect.
Expect More Labor Per Square Foot
In new construction, pipe gets routed through open framing before walls and ceilings are finished. In a retrofit, the contractor has to work around existing finishes, structure, and often existing occupants, which adds time and cost compared to the same size system installed new.
Water Supply Gets Evaluated Early
One of the first steps is confirming whether the building’s existing water supply can meet the new system’s hydraulic demand. If it can’t, a fire pump may need to be added, which is a significant scope addition to plan for early rather than discovering mid-project.
Phasing Matters for Occupied Buildings
For buildings that stay occupied during the work, contractors typically phase the installation floor by floor or section by section to minimize disruption, which can extend the overall timeline compared to an empty building.
Code Often Requires More Than the Minimum
Depending on the jurisdiction and the scope of renovation triggering the retrofit requirement, code officials may require the new system to meet current code in full, not just the portions being renovated.
See our full Commercial Fire Sprinkler Retrofit guide and Cost Guide for more on what drives retrofit pricing.