Once you have decided to buy a property, you will need to know exactly how much can you afford? Having your finances in place and having a mortgage agreed in principle (if required) before you start looking at properties is an important first step in buying a property.
On top of the cost of the house itself, there are many other, one-off expenses involved in buying a home and moving e.g. Stamp Duty, Survey fees, Solicitors Fees, Removal Fees, any final bills e.g. gas, electricity, from your present home when you move out, etc.