Remortgage for raising capital
The amount of equity you have in your home is determined by the value of your mortgage less the outstanding balance remaining, so if your original mortgage (the price you paid for your home) was £250,000, and the outstanding balance remaining is £150,000, then the amount of equity in your home is £100,000. This amount will only increase over time as you continue with monthly repayments on the loan.
Mortgage companies or lenders may also include the increase in the market value of your property since you bought it (as determined during a professional valuation) in the equity in your home. But be aware that house prices can fall as well as rise, so you will not always be able to count on this, and that you will also never be able to borrow the entire value of your property.
Remortgaging your property can unlock the equity accumulated within it, delivering a sizable lump sum for you to use for whatever purpose you require. However, you should remember that almost all lenders will need a certain amount of equity to remain in the property (in the same way as needing a deposit on a mortgage), and some may only be willing to lend funds for specific reasons, as defined in their individual criteria.