IHere is a detailed step-by-step guide on how to buy a house in Marbella, Spain from the UK:

• Research the real estate market in Marbella and determine your budget and preferences.
• Hire a real estate agent to assist with the property search and purchase process.
• Obtain a tax identification number (NIE) from the Spanish authorities, which is required for all legal transactions in Spain, including property purchases.
• Research and compare mortgage options from Spanish and UK banks. If you are a non-resident in Spain, you may be required to provide a larger down payment and may have to pay higher interest rates.
• Find a property that meets your criteria and make an offer through your real estate agent.
• Once the offer is accepted, sign a private purchase contract (contrato privado de compraventa) with the seller, outlining the terms of the sale.
• Pay a deposit to secure the property.
• Hire a lawyer to handle the legal aspects of the property purchase, including conducting due diligence on the property and representing you in the transaction.
• Obtain any necessary approvals or permits, such as planning permission or building certificates.
• Pay the purchase price and any applicable taxes, such as the purchase tax (impuesto sobre la compraventa de inmuebles) and notary fees.
• Register the property in your name at the Land Registry (Registro de la Propiedad).
• Obtain any necessary insurance, such as homeowner’s insurance.

It is recommended to work with a real estate agent and legal and financial professionals to ensure that the property purchase process goes smoothly and to understand all of the costs and requirements involved