Family Offices Are Adding Jurisdictions. UK Property Debt Can Become the Messy Part

The familiar story of a wealthy family “leaving Britain for Dubai” or “moving to Monaco” increasingly misses what is actually happening. New research from TMF Group suggests family offices are building access across several jurisdictions at once, creating more optionality but also more regulatory, governance and operational complexity.

TMF Group published its latest private-wealth research on 10 September, finding that family offices are no longer treating geographic diversification simply as a one-off response to political or economic uncertainty.

Instead, diversification is increasingly being used as a long-term risk-management strategy. Crucially, TMF says most family offices are not necessarily abandoning their established bases. They are expanding into additional jurisdictions as their businesses, investments and family interests grow.

That distinction matters for property finance. A family can have a sophisticated international wealth structure spanning several financial centres while the mortgage on a £5m London property remains tied to a lender that only accommodates one narrow version of that structure.

The Modern Family Office May Not Have One Financial Centre

For some internationally wealthy families, asking where they are “based” is becoming an increasingly difficult question to answer.

The principal family members may live in Monaco. Adult children may remain in London. A trust may be administered in Jersey. Investment assets may be custodied in Switzerland. The family business may operate from the Middle East, while UK property is owned personally or through separate companies.

Another family may divide time between Britain, Italy and Dubai while operating a family office from London and holding financial assets through institutions in several jurisdictions.

None of this necessarily represents a conventional relocation from one country to another. It is closer to the concept TMF describes as “optionality”: maintaining access to several markets, opportunities and wealth centres without becoming excessively dependent on any one jurisdiction.

Diversification Reduces One Risk and Creates Another Form of Complexity

TMF Group's research captures the paradox particularly well.

Geographic diversification can reduce exposure to political, economic or regulatory change in any one country. It can also bring a family closer to investment markets and provide greater flexibility over where businesses, assets and family members are located.

At the same time, every additional jurisdiction can introduce another set of reporting requirements, entities, advisers, governance obligations, banking relationships and administrative processes.

Tim Houghton, TMF Group's global head of private wealth and family offices, said diversification can protect families against local volatility and provide access to new opportunities, while requiring them to manage increasingly complex regulatory, reporting and governance requirements across borders.

Property debt has its own version of exactly the same problem.

The Lender Needs to Know Much More Than the Family's Net Worth

A family office may be able to produce a consolidated balance sheet showing £50m, £100m or considerably more in assets. That does not mean every UK lender will treat the borrowing requirement as straightforward.

The lender still needs to understand the actual borrower.

Where do they live? What citizenships do they hold? Where does their income arise? In which currency? Who legally owns the property? Is there a trust involved? Are guarantees being provided? Is the borrower an individual, an SPV or another corporate entity? Where are supporting investment assets held?

Those questions determine whether a lender can accommodate the structure rather than simply whether the family appears wealthy enough to repay the loan.

A £5m London Property Can Become the Awkward Part

Consider a hypothetical family whose principal members are now resident in Monaco.

They retain a £5m London home with a £2m mortgage approaching maturity. Investment assets of £15m are held between institutions in Switzerland and London. A Jersey trust forms part of the wider family structure, while income comes from a combination of investments and a business in the Middle East.

The family's overall wealth is not the issue.

The existing mortgage lender may nevertheless have questions about changed residence, acceptable income, the source and currency of that income, beneficial ownership, trust involvement and whether the structure still falls within its current policy.

A refinance that once looked like a simple £2m remortgage can therefore become a cross-border underwriting exercise.

Residence Is Only One Part of the Lender's Jurisdiction Map

Income Can Be Spread Across Several Countries Too

International wealth rarely fits neatly into a single UK payslip.

An entrepreneur may live in Dubai, draw income from a Middle Eastern company, receive dividends from another holding structure and hold investments through a Swiss institution. Their spouse may have separate income, while the UK property is held personally.

Another family member may have little conventional earned income because much of their financial strength sits in investments or family structures.

A lender therefore needs an underwriting approach capable of recognising the relevant income and assets. Different lenders can reach very different conclusions from the same family balance sheet because their appetite for foreign income, currencies, corporate earnings and international structures differs.

Ownership Structures Can Narrow the Market Further

The property itself may be owned by an individual, a UK company, an overseas company or within a structure involving trusts or other entities.

That distinction can materially change the finance available.

A lender comfortable providing a £3m residential mortgage to an overseas-resident individual may not necessarily accept a property held through the structure proposed by the family's legal and tax advisers.

Conversely, a private bank or specialist lender may be capable of considering a more complex ownership arrangement where there is a clear rationale, suitable security and sufficient transparency around the parties involved.

The structure should be determined with the family's legal and tax advisers. The finance then needs to be tested against lenders that can actually accommodate it.

Existing Loans Can Become Misaligned as the Family Evolves

One of the more easily overlooked issues is that property finance may have been arranged years before the family's current international structure existed.

A mortgage might have been agreed when the borrower was UK resident, received predominantly sterling income and held most financial assets in Britain.

Five years later, the same borrower may be resident overseas, have sold a business, moved investments to another jurisdiction and reorganised parts of the family wealth structure.

The property has not changed. The borrower may be considerably wealthier. But the lender's original underwriting assumptions may no longer describe the client.

That is why internationally mobile families can benefit from reviewing UK property debt well before the existing facility reaches maturity.

Moving Residence Before Reviewing the Mortgage Can Reduce Options

Timing matters particularly where a UK resident is considering an international move.

Changing residence can affect the lender universe. Income arrangements may change at the same time, bank accounts may move and the family may establish new investment or holding structures.

None of that means the mortgage will necessarily become problematic. It does mean the finance position should be understood before several variables change simultaneously.

For a family retaining substantial UK property, reviewing upcoming mortgage maturities before relocation can identify whether the existing lender is likely to remain suitable and what alternatives would be available after the move.

One Private Bank May See More of the Balance Sheet

Private banks can have an advantage in these cases because their underwriting may take a wider view of family assets, investments and the overall relationship.

A bank already holding £10m of investments may be more comfortable assessing a £2m UK property facility than a mortgage lender focused predominantly on conventional income multiples.

That can make a private-bank solution particularly effective for complex international borrowers.

It does not mean the property debt automatically needs to sit with the institution managing the assets. The bank may require a particular level of assets under management, collateral or wider relationship. Another private bank or specialist property lender may be able to structure the debt differently.

The value lies in comparing the available routes rather than assuming one institution must manage both assets and liabilities.

The Family May Already Have Too Many Banking Relationships

The opposite problem can also arise.

As families add jurisdictions, they can accumulate private banks, investment managers, property lenders and operating accounts across several countries. Each institution may only see one part of the overall structure.

A London mortgage lender sees the property. A Swiss bank sees the investments. A Jersey fiduciary understands the trust. A Middle Eastern bank understands the operating business.

No institution necessarily has responsibility for determining whether the debt arrangements across the family balance sheet remain efficient.

That can result in facilities being refinanced individually as they mature rather than considered as part of a coordinated liability strategy.

Should the Loans Be Consolidated?

Not necessarily.

A multi-jurisdictional family does not automatically need one global private bank providing every facility. There can be good reasons to maintain separate lenders, particularly where different institutions have stronger appetite for different properties or jurisdictions.

Consolidation can produce relationship benefits and simpler administration. It can also create concentration, with a large amount of family collateral and borrowing dependent on one institution.

The relevant question is whether each facility is separate for a good reason or simply because nobody has reviewed the debt collectively.

A Multi-Jurisdiction Debt Map Can Expose the Gaps

Before considering a refinance or new acquisition, it can be useful to map the family's UK property liabilities against the wider international structure.

New UK Purchases Need the Structure Tested Before Exchange

The same principle applies when an internationally structured family acquires new UK property.

A family office may have already decided, with its legal and tax advisers, which individual or entity should acquire the asset. The finance implications of that decision then need to be understood before the transaction becomes time-critical.

A £6m London purchase by an overseas-resident individual may have a different lender universe from the same property acquired through another structure. The family's ability to demonstrate wealth does not remove those underwriting distinctions.

Testing the proposed ownership and borrower structure early can identify whether the desired finance exists and what information lenders are likely to require.

Commercial and Investment Property Adds Another Layer

Family-office property exposure is not limited to London homes.

The same family may own residential investment portfolios, commercial property, development sites or operating real estate. Assets may be held through separate companies for legal, tax or commercial reasons.

Those properties can require different lenders and underwriting approaches even where the beneficial family behind them is the same.

A coordinated debt review therefore does not necessarily aim to force everything into one facility. It can instead identify which specialist lending markets are appropriate for each asset while keeping an overall view of leverage, security, maturities and guarantees.

Currency Deserves More Attention Than It Often Gets

A family can own a sterling asset while its economic life increasingly takes place in euros, dollars, Swiss francs or another currency.

That can create questions around how the debt should be denominated and how repayments will be funded.

Foreign-currency borrowing and hedging can introduce material risks and should be considered with suitably qualified advisers. From a property-finance perspective, however, the source and currency of income can also determine which lenders are able to consider the case in the first place.

It is another example of why “£100m family office” is not enough information to identify an appropriate UK property lender.

International Advisers Are Often the First to See the Problem

Fiduciaries, international accountants, private-client lawyers and family-office executives often have the clearest view of how the family's structure is evolving.

They know when a new holding company is being established, when residence is changing, when a trust is being reorganised or when assets are moving between jurisdictions.

Those changes can have consequences for existing or future property finance even where financing is not the reason for the restructuring.

That makes coordination particularly important. The legal or tax adviser determines what structure is appropriate within their professional remit. The finance adviser can then test how the proposed arrangement interacts with the available lender market.

Jersey and Other International Finance Centres Are Natural Coordination Points

TMF's research is particularly relevant to international finance centres because family-office diversification increases demand for professionals capable of administering entities and coordinating obligations across borders.

Jersey, for example, is identified by TMF's wider research as one of the less complex jurisdictions in its 2026 Global Business Complexity Index. Families may use established international centres for governance, administration or fiduciary functions while investments and property sit elsewhere.

For UK property finance, the significance is not that one jurisdiction is inherently preferable. It is that the professionals administering those structures can often identify upcoming property transactions, refinances and liquidity requirements long before a mortgage application is submitted.

Optionality Should Apply to the Debt as Well

TMF's description of modern private wealth as increasingly focused on optionality provides a useful way to think about financing too.

If a family deliberately maintains access to several markets and financial centres to avoid becoming dependent on one jurisdiction, it may also be worth considering whether its UK property borrowing has become unnecessarily dependent on one lender or banking relationship.

The objective is not to maximise the number of lenders. It is to preserve sufficient alternatives so that a change in residence, lender policy, asset custody or family structure does not leave a valuable UK property with very limited refinancing options.

That can mean maintaining relationships with private banks while also understanding the specialist property-lending market outside them.

How Willow Private Finance Can Help

Willow Private Finance works with internationally resident families, family offices, trusts, companies and high-net-worth borrowers requiring UK property finance across more complex ownership and income structures.

For a multi-jurisdictional family, the starting point is often not simply “how much can we borrow?”. It is understanding the complete borrower and ownership structure before determining which lenders can accommodate it.

That can involve mapping UK properties, existing debt, borrower and guarantor residence, ownership entities, income jurisdictions, relevant currencies, investment custody, private-bank relationships and upcoming finance requirements.

Willow can then assess the UK lending routes available across specialist property lenders and private banks, while working alongside the family's existing legal, tax, fiduciary and wealth advisers. We do not determine tax residence, legal ownership structures or fiduciary strategy. Those decisions remain with the appropriately qualified professionals.