Contingency reserves are designed as a cushion for unforeseen or unexpected repairs uncovered during renovation. The amount of financed contingency reserves varies and they may or may not be used for discretionary purposes, depending on the loan type. In most cases, any funds left over in contingency are applied as a principal reduction once the project has been completed. But if you elect to self-fund your own contingency reserves and there are funds left over, those may be refunded back to you.
On some renovation loans, a mortgage payment reserve may be financed to cover mortgage payments when a property will remain uninhabitable for a period of time during renovation.