Applying for a remortgage is much the same as appling for the initial home loan. You will need documents and information to support your application.
You'll a need a statement of earnings and the costs of your expenditure. The lender may send an agent to view the property for valuation or they may ask for you to pay for an independant valuer to inspect and give you a written report. Sometimes a real estate agent's report will suffice.
If property searches are required you may have to bear the costs of theses through a solicitor. Some lenders will accept title insurance to cover anything that the searches may miss.
If you're nearing the end of a fixed rate or discounted period you should begin looking around for a better deal for your mortgage. If you are prepared as soon as your discounted period ends, you may be moving straight into your negotiated remortgage deal. Saving you money in the long run.