200 Material Stone for the first house upgrade. 700 Material Stone for the second house upgrade.
you can upgrade your house at the bank
You can't upgrade handy smurf's house,you can only upgrade all the working smurf's house.
You have to upgrade your house once. Talk to Gotz the woodcutter to upgrade your hen house then again to upgrade your house.
dependspon the house but usully $100
Fully pay off your mortgage with Tom Nook and he will upgrade your house.
Electricity costs are not based on the value of your home but rather what and how much electricity you use in the home.
go to gannon and pay for him to upgrade it.
don't use so much electricity
go to gannon and select house upgrade and the next day it will be done