Equity is the difference between what your property is worth and what you owe on it. Accessing part of it can fund a deposit, a renovation, or an investment without selling anything.
It also increases your debt and the security is your home, so it deserves more thought than it usually gets.
Lenders typically allow borrowing up to a percentage of the property's value, less what you currently owe. Going beyond a certain loan-to-value ratio generally triggers LMI, which changes the arithmetic.
Lenders also ask what the funds are for, and some purposes are scrutinised more closely than others. Larger cash-out amounts usually require evidence of purpose.
Equity release converts something you own into something you owe. Used to buy an appreciating asset or to improve the property itself, that can be sound. Used to fund consumption, it turns a short-term expense into a debt secured against the roof over your head, repaid across decades.
The interest rate is attractive precisely because your home is the security. That's the trade-off, and it's worth naming clearly rather than glossing over.
I'd rather talk you through the downside properly and have you proceed with your eyes open than have you find out later.
Usually yes. The lender needs a current view of the property's value to work out available equity. Some lenders accept automated valuations for smaller releases; larger ones typically require a full valuation.
Often yes, through a top-up or increase with your current lender. Whether that's better than refinancing elsewhere depends on their rate and their appetite, and it's worth comparing both.
It can. Funds used for investment purposes may be priced differently from owner-occupier borrowing, and lenders treat business purposes differently again.