Fire crews and police officers were called to reports of a fire at the Lincoln YMCA building on St Rumbold Street this afternoon.
Lincolnshire Fire and Rescue said they received a report of a fire at 4.24pm at the supported supported accommodation base.
Three fire crews attended along with Lincolnshire Police officers.
It is understood that crews found a small fire on arrival and this was dealt with.
The cause has not yet been confirmed.
It is not thought there have been any injuries in connection with the incident.