Find out the fair market value of your property. To get the value of your home you can have it appraised. An appraisal might cost between $300 and $500 depending on your location. You can also find a rough estimate by visiting certain websites, such as Zillow (link in Resources), that provide property values in your neighborhood that have recently sold.
Check your most recent mortgage statement or call the customer service department of your mortgage lender to find out your mortgage balance. You will need all mortgage loan balances, so repeat as necessary. Additional mortgages are called second mortgages or home equity loans or home equity lines of credit, (HELOC).
Subtract the mortgage balance(s) from the property value. For example, if your home is valued at $175,000 and you have a mortgage balance of $90,000 your equity is $85,000, ($175,000 minus $90,000). If you refinance your home to tap into the equity, the equity decreases by the amount you borrow.