Top-tier American brokerages serve UHNWI clients with sophisticated domestic capability. The same brokerages structurally miss international acquisitions their clients are making across European markets. American agents typically learn of their clients’ European real estate activity after the fact: the Paris pied-a-terre, the Tuscan villa, the Comporta estate, the Mykonos summer house. The acquisition has been completed before the American advisor knew the client was actively looking. The relationship loss is structural, not personal.

The gap exists for structural reasons. American brokerage training focuses on local market expertise. Cross-border advisory skills, multi-jurisdictional structuring fluency, and European partner network depth are not typically part of the American agent’s professional development. The result is that American agents handle US transactions confidently and competently, then watch their clients make European acquisitions through brokerages and advisors the agents do not know.

Estimates suggest that approximately 35 percent of American UHNWI clients of top-tier brokerages have meaningful European real estate exposure their American agents are not actively advising on. The figure is approximate, based on industry surveys and brokerage-internal data, but the directional reading is consistent across multiple sources. For the brokerages whose clients are actively expanding European exposure, this represents substantial unrecaptured advisory revenue and relationship-share leakage.

Underlying behaviour is documented in Henley and Partners’ application data. American nationals submitted applications for alternative residence and citizenship at a rate 200 percent higher in Q1 2025 than Q1 2024, with Americans now accounting for over 30 percent of all Henley applications globally (Henley and Partners, 2025). The investment migration application precedes the European real estate transaction by 12 to 18 months in most cases. The deal pipeline is enormous. American brokerages whose clients filter through Henley’s application volume systematically miss the resulting European acquisitions because the brokerages lack European partner coverage at the cities and price points where the acquisitions happen.

Specific market dynamics make the gap visible. Italian flat-tax driven acquisitions in Milan and the surrounding Lombardy market are concentrated through Italian brokerages (Engel and Volkers, Sotheby’s International Realty Italy, Christie’s International Real Estate Italy, local specialists like Coldwell Banker Casalanova). American agents without partnerships with these brokerages do not see the deal flow. The trends every American agent should be tracking include the Italian flat-tax effect (Italian Ministry of Finance, 2024), the post-London UHNWI migration (HM Treasury, 2024; Henley and Partners, 2025), the rise of Lisbon and Comporta (Knight Frank, 2025b), and the broader Mediterranean fragmentation toward Montenegro, Greek islands, and Croatia.

Brooke Harrington’s analysis of cross-jurisdictional wealth management documents the architectural infrastructure underlying these acquisitions. The American family office director coordinating a Milanese acquisition relies on a network of Italian private client lawyers, Italian tax counsel, and Italian property advisors operating through documented economic and operational arrangements (Harrington, 2016). The American real estate agent who has not been integrated into this network is not a participant in the transaction. The American agent’s relationship with the family office director may continue for US transactions, but the European acquisition flows through a separate advisory channel the American agent does not control.

Caroline Knowles’ framework helps decode why the gap persists. Knowles documents how UHNWI principals operate through dense advisory networks where introductions and acquisitions happen through trust-based channels rather than through formal marketing (Knowles, 2022). The American agent who sees their client at Aspen in December and again in New York in March is operating outside the principal’s European advisory network. By the time the principal is back in New York to discuss the Florentine villa acquisition, the transaction has been structured through Italian advisors. The American agent’s relationship is downstream of the decision rather than upstream.

There is a counterintuitive dimension worth flagging. The American clients are not deliberately excluding their American agents from European acquisitions. They are following the natural path of advisory infrastructure. The Italian transaction requires Italian advisors. The Italian advisors are accessed through European networks the American agent has not built. The exclusion is structural, not relational. The American agent who builds genuine European partner relationships rejoins the principal’s advisory network for European transactions. The American agent who does not build these partnerships remains structurally excluded.

The opportunity cost is substantial. A top-tier American UHNWI client typically generates 200,000 to 800,000 dollars in annual brokerage relationship revenue. If 35 percent of these clients have European exposure their American agents are not advising on, the average relationship is leaving 70,000 to 280,000 dollars per client per year on the table. For a senior agent with 30 to 50 active UHNWI clients, the annual European-advisory revenue gap runs to 2 to 14 million dollars. Capturing even a portion of this through structured European partnerships represents a material change in the agent’s revenue trajectory.

The structural solution is direct: American brokerages need credible European partnerships with documented economics and operational integration, not just referral agreements. Compass, Christie’s International Real Estate, Knight Frank, Sotheby’s International Realty, and the major luxury brokerages have all invested in cross-border architecture, with varying degrees of operational depth. The Barnes-Compass partnership announced in 2023 is one explicit example of cross-Atlantic infrastructure designed to retain American clients’ European acquisitions within the Compass network rather than losing them to non-affiliated European brokerages. The success of any such partnership depends on operational depth: shared client management, joint marketing, integrated commission arrangements, and senior partner-level relationships that survive client introductions.

American agents whose brokerages provide credible European partnership infrastructure should map their UHNWI client base against the European intent signals (Henley application activity, European aviation subscription patterns, family office European hiring) and proactively engage with European partners before the principal initiates the acquisition. The early-stage engagement is what preserves the relationship across the transaction. The post-acquisition introduction typically arrives too late to capture the advisory economics.

For brokerages whose European infrastructure is shallow, the cost of building credible cross-Atlantic partnerships is substantial but recoverable. The capital investment in establishing operational integration with European partners, training senior agents in cross-border advisory, and developing the documentation and process infrastructure for joint client management typically runs 1 to 3 million dollars over 18 to 24 months for a mid-sized luxury brokerage. The recovery against retained client relationships and additional advisory revenue follows within 12 to 18 months for brokerages with substantial UHNWI client bases. For brokerages without UHNWI scale, the investment may not justify the recovery. For brokerages with substantial UHNWI scale, the investment in credible European partnership infrastructure is not optional. One in three UHNWI clients buys European real estate without their American agent. The European market is not optional.

References

• Harrington, B. (2016) Capital Without Borders: Wealth Managers and the One Percent. Cambridge, MA: Harvard University Press.

• Hay, I. and Beaverstock, J.V. (eds.) (2016) Handbook on Wealth and the Super-Rich. Cheltenham: Edward Elgar Publishing. ISBN 978-1-78347-403-5.

• Henley and Partners (2025) Henley Private Wealth Migration Report 2025. London: Henley and Partners and New World Wealth, June 2025.

• HM Treasury (2024) Autumn Budget 2024: Non-Domiciled Individuals: Reform Policy Document. London: HM Treasury, 30 October 2024.

• Italian Ministry of Finance (2024) Decreto-Legge n. 113 del 9 agosto 2024 (Decreto Omnibus). Gazzetta Ufficiale, 10 August 2024.

• Knight Frank (2025b) The Residence Report 2025/26. London: Knight Frank Research.

• Knowles, C. (2022) Serious Money: Walking Plutocratic London. London: Allen Lane (Penguin).

• Paris, C. (2016) ’The Residential Spaces of the Super-Rich’, in I. Hay and J.V. Beaverstock (eds.) Handbook on Wealth and the Super-Rich. Cheltenham: Edward Elgar Publishing, Chapter 12, pp. 244-263.