A first-time buyer was looking to purchase a newly built one-bedroom flat in London. While a gifted deposit was available from family, the core challenge was affordability. On a sole-income basis, the applicant's salary was insufficient to support the borrowing required, despite a strong employment record, clean credit profile, and supportive family circumstances.

Working closely with the client, Steve Verrell explored whether a Joint Borrower Sole Proprietor (JBSP) mortgage could provide a practical solution. By incorporating the income of the client's parents, both highly qualified medical professionals working in Dubai, the transaction became achievable while allowing the property ownership to remain solely in the client's name.

This type of scenario is increasingly common as property prices continue to outpace earnings, particularly for first-time buyers looking to purchase in London. Many prospective homeowners searching for ways of increasing mortgage affordability using parents' income or securing a UK mortgage with overseas family support face similar challenges.

Why Traditional Mortgage Affordability Was Not Enough

The client was employed on a permanent basis and earning £36,500 per annum. While this represented stable employment and a positive career trajectory, mainstream affordability calculations significantly restricted the available borrowing.

Following a detailed assessment, maximum borrowing on a sole-name basis was estimated. Although some initial affordability models suggested a higher figure could be achievable, lender underwriting became more restrictive once commitments such as student loan deductions, council tax, property-related costs, and standard living expenditure assumptions were applied.

This left a substantial gap between available borrowing and the funding required to purchase the chosen property.

Traditional lenders often struggle to accommodate scenarios where a buyer's future earning potential is strong but their current income does not yet support the desired purchase price. While the client was clearly capable of managing responsibility for homeownership, affordability models remain heavily focused on current verified income.

Using a Joint Borrower Sole Proprietor Structure

To bridge the affordability shortfall, Steve explored a Joint Borrower Sole Proprietor arrangement.

Under this structure, the client's parents would be added to the mortgage application as supporting borrowers, allowing their income to be included within affordability calculations. Importantly, the property itself would remain solely owned by the client.

The parents were both employed as senior medical consultants in Dubai. They also had experience managing UK property investments and maintained a strong financial position.

The challenge was that many lenders either do not accept overseas income or apply significant restrictions when assessing foreign currency earnings. Some lenders will also decline applications where supporting borrowers are non-UK residents.

Specialist lenders are able to assess these circumstances differently. Rather than automatically excluding overseas income, they evaluate the stability of employment, the currency involved, the applicants' professions, and the wider financial profile of the family.

Because both supporting borrowers worked in established medical professions and received substantial, verifiable income, specialist underwriting teams were comfortable considering their earnings despite being paid in UAE Dirhams.

Balancing Deposit Size and Mortgage Costs

Several funding structures were modelled to determine the most suitable route forward.

The first option involved a gifted deposit and a mortgage. This achieved the purchase objective but resulted in higher monthly repayments due to the elevated loan-to-value ratio and the specialist nature of the lending.

The second option increased the gifted deposit, reducing the required borrowing. This produced significantly lower monthly repayments and generated substantial interest savings over both the initial fixed-rate period and the longer term.

The trade-off was straightforward. Retaining family capital provided greater liquidity but increased borrowing costs. Contributing a larger deposit reduced the overall cost of borrowing and improved affordability metrics.

This type of decision frequently arises in family-assisted mortgage arrangements, particularly where parents have accumulated significant wealth and are deciding whether to support children through gifting capital, income support, or a combination of both.

Why Specialist Lending Was Required

Not all lenders approached the case in the same way.

Several mainstream providers were unsuitable due to restrictions surrounding overseas income, non-UK resident supporting borrowers, and affordability limitations linked to the applicant's personal earnings.

New-build properties can also introduce additional underwriting considerations, particularly in London where some lenders apply reduced loan-to-value limits or stricter valuation criteria.

Specialist lenders were better positioned to assess the overall strength of the case. Rather than focusing solely on the applicant's income, they considered the combined financial profile, parental support structure, professional occupations, and long-term sustainability of the arrangement.

The resulting solution enabled borrowing levels that would otherwise have been unattainable.

For clients exploring related scenarios, similar underwriting principles often apply to expat mortgage cases, foreign currency income mortgages, and other forms of complex income structures where standard affordability models do not tell the full story.

Creating a Pathway to Future Independence

An important aspect of the recommendation was future flexibility.

The client was at an early stage of their career, with strong potential for income growth over time. By securing the property now through a Joint Borrower Sole Proprietor structure, there would be opportunities in future years to review the mortgage and potentially remove the parents from the arrangement once affordability could be supported independently.

This was one reason why shorter fixed-rate options were also considered. While longer fixes provided certainty, shorter arrangements could allow the client to benefit from future salary increases and potentially access more competitive products later.

The strategy therefore solved both the immediate objective of homeownership and created a clear route toward future financial independence.

The Outcome

Through careful lender selection and specialist structuring, Steve Verrell was able to identify a Joint Borrower Sole Proprietor solution that allowed the purchase of the London property to proceed.

The arrangement enabled the client's parents' overseas income to be included within affordability calculations while ensuring the property remained solely owned by the client. Multiple deposit scenarios were assessed to provide clarity on both affordability and long-term borrowing costs, allowing the family to make an informed decision based on their priorities.



Alongside the mortgage recommendation, income protection was also arranged to help safeguard the client's ability to meet living costs and financial commitments in the event of illness or injury.