An explosion was reported in a water pipe used by firefighting sprinklers fitted in a building.
A decorative element collapsed due to the incident, leading to the property's evacuation.
Kuwait Fire Service Directorate (KFSD) said that employees of the Civil Service Commission (CSC) in Shuwaikh were evacuated as a precautionary measure.
KFSD said the collapse was "minor".
No injuries were reported from the incident, KUNA reported, citing a statement by KFSD.
This July, Gen Khaled Al-Mekrad, director-general of KFSD, outlined key details about Kuwait's fire safety sector.
Site supervisors "are responsible for most" fire incidents that have occurred at Kuwaiti construction sites in the recent past, he said.
KFSD is taking "necessary measures" against those causing fires, "regardless of that person's identity".
The number of "deliberate fires in 2016 reached 409", Al-Mekrad told state agency KUNA.
Most fires in buildings under construction, according to Al-Mekrad, can be attributed to "the way [...] iron was cut inside the site, causing sparks to start [fires] when they land on wood".
Recent fires at the Sabah Al-Salem University City, Kuwait Credit Bank, and a Sharq-based tower's construction sites were caused due to the same reason, he added.
Iron should not be cut within the project premises, Al-Mekrad continued, according to KUNA's report.