Customers 40 gallon water heater was leaking in the garage. Replaced Watet heater with new 40 gallon Bradford white water heater. Upon removal of the old water heater I noticed customer had severe water damage to water heater closet as well as inside of the house in the kitchen, laundry room, and living room. Recommended doing proper remediation. Quoted approximately $8-10,000 from demo and Drydown. Explained a separate quote could be given for our back once demo was done.