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Buy-to-let mortgages · Client case study

Refinancing five SPV buy-to-lets with portfolio-wide cost control

A portfolio landlord refinanced five limited-company investment properties as fixed rates expired, balancing competitive pricing, lower transaction costs and flexibility for future growth.

SPV buy-to-let Portfolio refinancing Interest-only
Steve Verrell, Willow Private Finance adviser
The adviser behind the case

Steve Verrell

Steve reviewed the five mortgages as one portfolio decision, comparing pricing, fees, underwriting and company-structure requirements rather than treating each property as an isolated refinance.

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The case at a glance

The challenge
Five SPV buy-to-let mortgages were approaching the end of their fixed-rate periods, with costs and portfolio underwriting to manage across every property.
The solution
Refinance all five on consistent 28-year interest-only terms with a lender offering competitive fixed-rate options and lower ancillary costs.
The outcome
The portfolio retained its preferred repayment structure while free valuations, free legal work and no lender arrangement fees reduced refinancing costs.
01 / The challenge

Five maturities. One portfolio decision.

The landlord owned five residential investment properties through the same Special Purpose Vehicle. All were financed with one lender on interest-only terms, and the fixed-rate periods were due to end later in the year.

The underlying portfolio was performing well. Rental income was consistent and borrowing remained moderate relative to property values. The refinancing question was therefore not about rescuing a stressed portfolio; it was about deciding whether staying with the existing lender still represented the best overall route.

  • Portfolio-level underwriting Each property needed to support its own borrowing while the lender also considered the company, shareholders, directors and wider portfolio exposure.
  • Costs multiplied across five transactions Valuation charges, legal fees and product fees that might look modest on one remortgage could become significant when repeated five times.
  • Future flexibility mattered The clients wanted payment certainty without choosing a structure that unnecessarily restricted future refinancing, overpayments or portfolio expansion.
02 / The refinance strategy

Compare total cost, not just the headline rate.

Steve compared lenders on the basis of the complete refinancing proposition. The selected lender offered both two-year and five-year fixed-rate products, no lender arrangement fees, included standard valuations and free legal services when its nominated conveyancer was used.

  1. Review all five properties together

    Assess rental performance, leverage, existing mortgage terms and the cost of refinancing the portfolio as a whole.

  2. Select a lender around total portfolio cost

    Balance fixed-rate pricing against arrangement fees, valuations, legal costs, underwriting approach and overpayment flexibility.

  3. Keep the repayment structure consistent

    Refinance each property over the remaining 28-year term on an interest-only basis, preserving cash flow and a common portfolio structure.

The refinancing decisions used in this case. Individual loan amounts, property values and mortgage rates have not been disclosed.

The interest-only structure aligned with the clients' investment strategy: rental income and capital growth remained central, with future repayment expected to come from property sales or later refinancing rather than accelerated capital reduction during the mortgage term.

03 / Company underwriting

Resolve the ownership issue without disrupting the refinance.

During underwriting, one shareholder who held more than 25% of the company was not currently recorded as a Person with Significant Control. Under the selected lender's policy, that shareholder also needed to become a party to the mortgage application.

Steve worked with the clients and their accountant to understand the implications before proceeding. Once the accountant confirmed that the proposed Companies House changes would not create adverse consequences, the remaining question was timing.

Changing company records during the legal process risked introducing avoidable delay. The recommendation was therefore to complete the refinancing first and make the agreed company-record update afterwards, keeping the legal process stable while still satisfying the lender's governance requirements.

04 / The outcome

A consistent refinance with lower ancillary costs.

All five properties were refinanced on 28-year interest-only terms. The structure retained healthy monthly cash flow and gave the clients access to both two-year and five-year fixed-rate options, together with the ability to make annual overpayments of up to 10% without penalty.

The absence of lender arrangement fees, together with included standard valuations and free legal work through the lender's nominated conveyancer, reduced the ancillary cost of completing five remortgages at the same time.

Just as importantly, the shareholder issue was identified and planned for before it became a legal obstacle. The resulting structure supported the current portfolio while keeping future acquisitions, overpayments and later refinancing open as strategic options.

The key lesson

For a portfolio refinance, the right result is measured across pricing, fees, underwriting and future flexibility—not by the mortgage rate in isolation.

05 / Your questions

Understanding SPV portfolio refinancing.

Can several SPV buy-to-let mortgages be refinanced at the same time?

Potentially. Lenders will usually assess the proposed loans alongside rental cover, property values, company ownership and the landlord's wider portfolio. Coordinating maturities can make costs and product choices easier to compare, but lender criteria vary.

Why do fees matter more when refinancing a portfolio?

Because charges can be repeated across each property. Arrangement fees, valuations and legal costs that appear manageable on one remortgage may become material across five or more transactions, so the total cost of the package matters alongside the rate.

Can an SPV buy-to-let mortgage stay on interest-only?

Interest-only remains a common structure for investment property where the lender accepts the case and there is a credible repayment strategy. The capital balance does not reduce through normal monthly interest payments and still has to be repaid at the end of the term.

Do shareholders and directors affect limited-company mortgage underwriting?

They can. Lenders set their own requirements around directors, shareholders, guarantees and company control. This case required an additional shareholder to join the application, which is why the ownership structure needed to be reviewed before the legal process progressed.

Is a two-year or five-year fixed rate better for a portfolio landlord?

Neither is automatically better. A shorter fix can preserve earlier refinancing flexibility, while a longer fix can provide more payment certainty. Fees, early repayment charges, planned acquisitions or sales and the landlord's wider strategy should all be considered.

Your portfolio. Your next refinance.

Make every property work as part of the wider strategy.

If several buy-to-let mortgages are approaching renewal, the useful comparison is not just rate against rate. Willow can review lender fees, rental cover, company structure and future portfolio plans together.

Understand your options before you commit. Your initial conversation, assessment and presentation of suitable options are free, with no obligation. Any fees are explained before you decide whether to proceed.

  • 01 Review the portfolio Map maturities, rent, leverage, ownership and objectives.
  • 02 Compare total cost Look beyond rates to fees, legal work, valuations and flexibility.
  • 03 Coordinate the refinance Manage lender, valuation, underwriting and legal requirements together.
Steve Verrell, Willow Private Finance adviser

Steve Verrell

Adviser at Willow Private Finance

Start with the five-property picture rather than five separate product searches. The Willow team can assess the portfolio and explain suitable routes before you decide whether to proceed.

Enquire with the Willow team Or call 0207 082 5175

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About this case study. Client details have been anonymised. This is an individual case, not a guarantee of lending terms. Criteria, pricing and availability can change; applications remain subject to assessment, valuation and underwriting.

Interest-only mortgage payments do not reduce the capital balance. A credible repayment strategy is required, and landlords should allow for rental shortfalls, voids, maintenance, tax and other property costs when assessing affordability.

As a mortgage is secured against your home or property, it could be repossessed if you do not keep up the mortgage repayments. The Financial Conduct Authority does not regulate some forms of buy-to-let mortgages.