Mortgage brokers are warning that homeowners who become landlords after changing personal circumstances face a complex lending landscape that differs significantly from standard buy-to-let arrangements.
According to the government’s latest English Private Landlord Survey, 37% of individual landlords originally bought their first rental property to live in themselves, while 52% purchased with the intention to let. A further 6% acquired their first rental through inheritance.
Billy McCluskey of Commercial Trust highlighted the mortgage challenges facing these ‘accidental landlords’. “If I could give accidental landlords one piece of mortgage advice, it would be not to leave this until the last minute,” he said.
Consent to let not a permanent solution
Homeowners with residential mortgages must obtain lender permission before renting their property. While some lenders offer ‘consent to let’ arrangements allowing temporary letting on residential mortgage terms, this is not a long-term strategy.
The transition to permanent letting typically requires a consumer buy-to-let mortgage, which differs from standard buy-to-let products. Consumer buy-to-let mortgages exist specifically for circumstances where homeowners become landlords due to changed personal situations rather than deliberate property investment.
Loan-to-value ratios create barriers
Equity levels can significantly restrict options. Many high street lenders cap buy-to-let lending at 80% loan-to-value (LTV), meaning borrowers requiring higher LTV ratios face a reduced pool of willing lenders.
McCluskey cited a recent case where a client needed to borrow at 83% LTV, which eliminated most mainstream lenders from consideration. The combination of consumer buy-to-let classification, high LTV requirements and landlord experience classification narrowed available options considerably.
Market remains active despite complexity
UK Finance recorded 58,272 new buy-to-let loans worth £10.8 billion in Q1 2025, up 3.3% by number and 7% by value year-on-year. Average gross rental yields rose from 6.93% to 7.21% during the same period.
However, lending criteria vary significantly between lenders, with factors including LTV, rental income, personal income, landlord experience, property type and how the borrower became a landlord all affecting eligibility. This complexity has contributed to longer transaction times in parts of the property market.
The mortgage structure also differs from residential lending. While residential mortgages typically operate on a repayment basis, buy-to-let mortgages are often arranged on an interest-only basis, resulting in lower monthly payments but no reduction in the principal amount borrowed.
Conclusion
The accidental landlord market represents a significant portion of the private rental sector, but homeowners considering letting their properties face mortgage arrangements that differ substantially from both residential and investment buy-to-let lending. Industry professionals recommend early consultation with mortgage advisers before committing to tenancies, as lending criteria and product availability vary considerably depending on individual circumstances.
