Active job

Kitchen floor very soft, to fix it underneath

Found some areas of kitchen floor become soft when step on. Possibly rotten or? Underneath. ? Need to change a timber? Wants this job done as soon as possible. Please come have a look and get a quote. I don’t know what is the problem and how much the this will cost. Please ignore the price. We need to know the job first. Wel will see the price. Thanks.