A Let to Buy mortgage is a structured financial arrangement that allows a homeowner to retain their current property and rent it out while purchasing a new residential home. In practical terms, the existing property is converted to a rental investment, while a new mortgage is secured for the onward purchase. This approach is commonly assessed by lenders under separate affordability and risk frameworks, with each element considered independently. What is a Let to Buy mortgagehttps://smartcitymortgages.co.uk/blog/let-to-buy-mortgage-guide-how-it-works-criteria-costs-and-risks-2026/ ? It is a dual-transaction process involving the refinancing of an existing residential mortgage into a rental-based agreement, alongside the acquisition of a new owner-occupied property. The borrower effectively becomes both a landlord and a residential homeowner at the same time, subject to compliance with lending criteria and regulatory expectations. How does a Let to Buy mortgage work? Typically, the borrower remortgages their current home onto a product that permits letting, often aligned with rental yield expectations. Simultaneously, a new mortgage is arranged for the purchase of a second property intended for personal occupation. The rental income generated from the original property is considered by lenders when assessing affordability, although stress testing and conservative assumptions are usually applied. Who is Let to Buy suitable for? This structure may be relevant for individuals seeking to move home without selling their existing property, particularly where long-term capital growth or rental demand is anticipated. It can also be considered by borrowers with sufficient income stability and asset backing to manage two mortgage commitments under varying market conditions. Let to Buy vs Buy to Let: what’s the difference? While both involve rental property, the distinction lies in ownership history and intent. Buy to Let typically refers to purchasing a property specifically for rental purposes, whereas Let to Buy involves converting a previously owner-occupied residence into a rental asset while purchasing a new primary home. What are the lending criteria for Let to Buy mortgages? Lenders generally assess creditworthiness, income stability, existing debt exposure, and projected rental income. Stress testing is applied to ensure the borrower can meet obligations even if rental income fluctuates or interest rates increase. Additional scrutiny may apply where borrowers have multiple properties or complex income structures. How much equity or deposit do you need? Equity requirements can vary, but lenders often expect a significant proportion of equity in the existing property, alongside a deposit for the new purchase. This is to mitigate risk and ensure sufficient loan-to-value ratios across both mortgages. How do lenders assess rental income? Rental projections are typically based on independent valuations, with lenders applying coverage ratios to determine whether the income sufficiently exceeds mortgage repayments. Conservative assumptions are used to account for vacancies, maintenance, and market volatility.