Mortgage Lenders Revise Rates and Criteria: What London Landlords Must Do Now

Overview of Recent Mortgage Rate and Criteria Changes

Several key mortgage lenders have announced updates effective from 20–22 May 2026 that will directly affect UK landlords, especially those in London. NatWest, Barclays, Santander, Darlington Building Society, and Accord Mortgages have adjusted their mortgage interest rates, product availability, and lending criteria, with implications for buy-to-let (BTL) financing, tenant affordability, and future investment strategies.

Why These Changes Matter to Landlords

NatWest has notably increased buy-to-let mortgage rates, raising financing costs for landlords renewing or arranging new mortgages. Santander's withdrawal of mortgage products at 60% and 75% loan-to-value (LTV) bands for first-time buyers reduces borrowing options for prospective owner-occupiers, potentially affecting rental market supply as fewer buyers may enter the market.

Accord Mortgages has raised the minimum eligible income for borrowers with loan-to-income (LTI) ratios above 4.49 from £50,000 to £65,000. This tightened criterion could impact landlords who self-finance or those assessing tenant affordability indirectly, as higher income thresholds may limit some tenants' borrowing capability or delay their transition to homeownership.

Darlington Building Society and Barclays have also adjusted rates across various LTV bands, which should be reviewed carefully by landlords with properties financed through these lenders.

Practical Implications for Different Landlord Profiles

• Single-Unit Landlords: Increased BTL rates, particularly with NatWest, will raise mortgage servicing costs. Reassessing rental yields and considering rent adjustments may be necessary.

• HMO Landlords: Given the complexity of their financing and multiple mortgaged units, even small rate hikes multiply overall costs. An immediate portfolio review is advisable.

• Portfolio Landlords: Changes in lending criteria and reduced product availability might limit refinancing or acquisition strategies. Ensuring compliance with new lender income requirements and exploring alternate lending options will be critical.

• Accidental Landlords: Those who self-finance should note Accord’s raised income thresholds potentially affecting their borrowing capacity. Planning for possible increased financing costs or reduced leverage is prudent.

Recommended Next Steps for Landlords and Property Teams

1. Review Current Mortgage Arrangements: Identify which properties are financed through affected lenders and model the impact of rate increases on cash flow.

2. Communicate with Lenders: Confirm any specific eligibility criteria changes directly to avoid surprises during refinancing or new applications.

3. Advise Tenants and Buyers: Inform tenants, especially those aiming to purchase, about tightened lending requirements that may affect their ability to buy.

4. Update Strategies: Adjust property acquisition, disposal, and rent-setting plans in light of increased financing costs and potential shifts in rental demand.

5. Monitor Ongoing Transactions: Ensure mortgage applications in progress align with the new criteria effective late May 2026 to prevent compliance or financial planning issues.

How Rentals & Sales Can Support You

Our expert team can conduct a comprehensive portfolio mortgage review, assessing financing risks and opportunities under the new lender policies. We also offer compliance audits to ensure your mortgage and tenant communications meet regulatory expectations. Additionally, we provide tailored pricing strategies to maintain competitive rental yields amid evolving cost structures.

Compliance Disclaimer

This article provides general information and does not constitute financial advice. Landlords should consult directly with mortgage lenders and qualified financial advisors to obtain advice tailored to their specific circumstances and ensure compliance with all applicable regulations.