Client Voices
Words From Those
Who Know Best
Our clients include heads of state, sovereign wealth funds, celebrated families, and global executives. Their words, offered voluntarily and with gratitude, speak more than any accolade could.
Client retention across 40 years
Completed transactions worldwide
Continents of active client relationships
Clients referred by an existing client
Only since 1984
In Their Words
Client Testimonials
Unedited, unsolicited accounts from our most valued clients — shared with their permission.
Onyx Realty found us a penthouse we had only dreamed of — off-market, in the exact building we wanted, at a price our previous agents had told us was impossible. Their network and discretion are in a class entirely of their own. We have since used them for three further acquisitions and would recommend them without reservation to anyone who expects the very best.
The white-glove service from first call to closing exceeded every expectation. I have purchased properties in twelve countries. None as seamlessly as this.
In thirty years of high-end real estate dealings, I have never encountered a team that so thoroughly understands what truly private means. Onyx Realty is extraordinary.
We had been searching for an Alpine retreat for two seasons. Onyx presented us with Chalet Morgenröte within ten days of briefing them — a property we would never have found on the open market, precisely because it was never there.
Our family office has used Onyx to assemble a six-property international portfolio over four years. The investment advisory team understands real estate as an asset class the way our private equity advisors understand equities. Institutional rigour, applied to the finest addresses in the world.
After twenty years of working with different agencies across Europe, I can say with complete conviction that Onyx Realty operates at a level that no other firm comes close to. Their access, their people, and their discretion are simply without equal.
How We Serve You
A Relationship Built for a Lifetime
A client relationship with Onyx Realty is not transactional. From the moment we accept a mandate, our commitment to your interests becomes permanent — whether that means a single acquisition or forty years of ongoing portfolio management.
Our 98% retention rate is not a statistic we market. It is the natural result of a service model designed around lifelong loyalty, not short-term commissions.
Introduction & First Call
Every relationship begins with a referral or direct approach to our office. A senior advisor contacts you within 24 hours.
Confidentiality Agreement
Before any substantive discussion, a mutual NDA is executed. Your identity and intentions remain protected from this moment forward.
Bespoke Brief & Mandate
We spend as long as necessary understanding your exact requirements — property, location, lifestyle, legacy, and financial parameters.
Transaction & Lifelong Relationship
We execute, close, and remain your trusted advisor indefinitely — for future transactions, portfolio reviews, or any property matter that arises.
Real Outcomes
Client Acquisition Stories
Three anonymised accounts of extraordinary outcomes achieved for our clients.
"We had tried everywhere else first."
A senior diplomat and his family had spent 18 months seeking a suitable pied-à-terre in central London with another agency. After introduction to Onyx, their advisor identified and secured a Mayfair townhouse — never publicly listed — within 28 days. The property had been held by the same family for three generations.
"We needed to sell without anyone knowing."
A prominent European family needed to liquidate a Côte d'Azur estate discretely, following a restructuring of family holdings. Onyx conducted the entire sale under NDA, approaching 22 qualified international buyers. The property transacted in 74 days with no public record of the listing or the vendor's identity.
"We needed a portfolio, not just a property."
A Gulf-based family office instructed Onyx to construct a $300M real estate portfolio across four jurisdictions. Over 22 months, our advisory team sourced, structured, and closed nine acquisitions — all off-market, all currency-diversified — with no single asset exceeding 18% of total allocation.
Our Clientele
Who We Work With
Our client base spans private individuals, family structures, and institutional entities — united by a shared standard of expectation.
Private Individuals
Ultra-high-net-worth individuals seeking primary residences, trophy assets, or lifestyle properties in the world's most prestigious locations.
Family Offices
Single and multi-family offices seeking portfolio diversification through trophy real estate, with institutional-grade advisory and reporting.
Dynastic Families
Multi-generational family structures requiring estate management, succession planning through real estate, and long-horizon portfolio construction.
Sovereign & Institutional
Sovereign wealth funds, royal families, and institutional investors requiring geopolitical sensitivity and ultra-discretion in all dealings.
Our Commitment
The Onyx Confidentiality Pledge
Since 1984, not a single client identity, transaction detail, or acquisition intention has been disclosed without explicit written authorisation. This is not a policy. It is the foundation on which every client relationship is built.
- Mutual NDA executed at the start of every engagement
- No public listings of client-linked transactions without consent
- All staff bound by perpetual non-disclosure agreements
- Zero data sold to third parties under any circumstance
- Dedicated private communication channels for all active clients
Become a Client
The First Step is a Conversation
Every Onyx client relationship begins with a single confidential call. There is no obligation, no pressure, and no public record. Tell us what you are looking for, and we will tell you what is possible.
Request a Private IntroductionAll enquiries acknowledged within 24 hours. Identity protected from first contact.