Equity

Definition
The difference between your property’s value and the debts secured against it. On paper it is simple; in a refinance, three filters reduce the amount available. The lender uses its own value, often an appraisal, not your estimate. It caps the new loan at 80% of that value. And from the amount obtained, the current balance, the penalty, and the fees come off. Example: a home estimated at $600,000, balance of $350,000. Gross equity is $250,000, but 80% of $600,000 is $480,000; minus the balance, $130,000 of theoretical room remains. If the appraisal comes in at $570,000, the room falls to $106,000, and after a $6,000 penalty and $2,500 of fees, the net cash is about $97,500. That last figure is the one to budget with.
For your plans
Subtract secured debts from recognized value, then apply the financing limit and fees. Book equity is not the same as net funds available.