A pre-approval can give you peace of mind, but they generally last for 90-180 days, so you don't want to be applying for them too soon.
If you're serious about buying within the next couple of months a pre-approval can give you confidence to sign for your next property.
At Clear Vision Finance we fully assess your borrowing capacity, using the latest lenders calculators so that you know what you can borrow, before you make an offer to purchase, but if you have found a property already that's ok, we can move straight to applying for unconditional approval.