A market counted in hundreds of transactions
Nationally, 949,000 existing homes changed hands on a rolling twelve-month basis to the end of May 2026, up 5.7% year on year, compared with 945,000 to the end of December 2025. On 17 June 2026, the FNAIM (the French federation of estate agents) forecast between 900,000 and 920,000 sales for the year, a decline of 5 to 6% compared with 2025. These orders of magnitude describe a mass market that is normalising after a low point reached in 2024.
The Paris prestige segment has nothing in common with this market. It records around 2,800 transactions a year above €1 million, of which 800 to 900 above €2 million. Narrowed down to one price bracket and one arrondissement, the number of comparable sales over a year is counted in dozens. In so narrow a pool, information circulates through personal networks before it circulates through listings, and advertising loses part of its usefulness.
This is the first reason for the off-market, and it is structural. When the number of solvent buyers for a given property fits on one page, wide distribution brings no additional buyers. It merely exposes the seller.
Why a seller refuses advertising
The reasons are rarely speculative. An unsettled estate, a separation under way, an unannounced professional relocation, a public or diplomatic position, the wish not to inform a tenant, a business partner or the neighbours: at the top end, discretion is often a precondition for putting a property on the market, not a negotiating argument.
A second category of reasons is tax-related, and it can be read in the timetable. Capital gains on property realised by individuals are taxed at 19% income tax and 17.2% prélèvements sociaux (social security levies). The holding-period allowance amounts to 6% per year from the sixth to the twenty-first year, then 4% in the twenty-second, with full income tax exemption after 22 years. Social security levies follow a slower pace, 1.65% per year from the sixth year, with full exemption after 30 years. A surtax of 2% to 6% is added above €50,000 of taxable gain.
An owner close to one of these thresholds has no interest in declaring himself a seller. He prefers to listen, without a public mandate, to a proposal that would justify bringing the sale forward. Understanding the seller's timetable is often worth more than knowing his price, because it determines his ability to wait.
What the buyer must be able to prove
A confidential seller does not accept a viewing, he accepts a buyer. Prior qualification covers four points: the real budget including works, the source and availability of funds, the decision timetable, and the identity of the decision-makers. A buyer who cannot answer these four questions will not be introduced, whatever his financial standing.
Financing should be documented rather than asserted. In September 2026, the average 20-year rate stands at 3.35% according to the Observatoire Crédit Logement/CSA, with brokers' barometers ranging from 3.40% to 3.54% and the strongest applications obtaining 3.00 to 3.10%. The 10-year OAT (French government bond) crossed 4% in September 2026, a level not seen since 2009, and the trend in rates is once again upward. A written bank simulation, even a non-binding one, carries more weight than a declaration of intent.
The budget must also include acquisition costs. The 2025 Finance Act authorised the départements to raise the rate of droits de mutation (transfer duties) from 4.50% to 5.00% between 1 April 2025 and 30 April 2028, and as at 1 June 2026 almost all of them, including Paris and Île-de-France, apply this ceiling. Acquisition costs thus reach up to around 8.5% of the price. On a €3,000,000 transaction, this represents around €255,000, which is neither negotiable nor financeable by every lender.
The search mandate is a contract
The loi Hoguet (the law regulating estate agents) requires the intermediary to hold a carte professionnelle (professional licence), a financial guarantee and a written mandate. The search mandate (mandat de recherche) reverses the usual logic: the buyer entrusts a mission of sourcing, screening and presentation, instead of waiting for a property to be offered. In a market defined by scarcity, it turns passive monitoring into a directed search.
Three clauses deserve to be read line by line. The definition of the search scope, which must be precise enough to be useful and broad enough to remain realistic. The fee: its amount, who bears it and what triggers it. And the treatment of the properties presented, which protects the intermediary against being bypassed and the buyer against double invoicing if the property was already known to him.
The duration and the termination terms complete the whole. A search mandate that is too long, with no reporting obligation, commits no one. A short mandate with a formal progress review produces more.
The documents to obtain before any offer
Confidentiality does not exempt anyone from due diligence. It merely shifts its timing: documents are disclosed to a small circle, earlier in the process, often under a mutual non-disclosure undertaking.
- The title deed, the chain of title and the list of easements.
- The technical survey file (dossier de diagnostic technique), provided no later than the promesse de vente (preliminary sale agreement).
- The minutes of the last three general meetings of the copropriété (co-ownership) and the statement of service charges.
- The works fund, the multi-year works plan and works voted but not yet called.
- Current leases or occupancy agreements, and their expiry dates.
- The property's position regarding the droit de préemption urbain (the municipality's urban pre-emption right) and, where applicable, the surroundings of historic monuments.
The non-professional buyer's ten-day withdrawal period and the loan condition precedent (condition suspensive de prêt) apply in the same way as in a public sale. A seller who asks for them to be waived is stepping outside the legal framework, and that request should be treated as a warning sign.
The illusions of confidentiality
Off-market is not a synonym for discount. A property that is not advertised escapes precisely the competition that reveals a market price. An owner who is in no hurry sets his reserve value, and nothing obliges him to justify it. A confidential property is sometimes more expensive than a listed one, for the sole reason that no one has ever tested its price.
The discipline therefore consists in reintroducing the missing references oneself. The Paris median price of €9,580/m² in the first quarter of 2026 serves as a floor for reasoning, not as a comparable. The averages for the top end, around €19,200/m² in the €3 to 5 million bracket and around €27,500/m² above €5 million, frame the bracket. Neighbourhood values refine the picture: more than €25,000/m² in the Triangle d'Or, around €16,300/m² for the top end of the 16th arrondissement in July 2026, from €15,000 to €22,000/m² around Parc Monceau.
One last asymmetry deserves to be named. Around 60% of transactions in the Paris luxury segment are made by international clients. A foreign buyer under pressure from a relocation timetable sometimes pays a price that no local reference supports. The absence of visible competition is not a guarantee of a sound acquisition.
Our view
Access to the confidential market is built in advance. It requires a documented buyer profile, a written mandate defining the mission, and an intermediary whose discretion can be verified with previous sellers. These are three cumulative conditions, and none can be improvised at the moment a property comes up.
They are not enough to guarantee a price. The valuation work remains entirely to be done, and it is more demanding than in the open market since the asking price has never been tested. We consider that a confidential offer should only be made after a written comparables analysis, a costing of works by a qualified professional and a review of the co-ownership file by the buyer's adviser.
What the off-market genuinely offers remains: negotiating time, a single counterpart, no bidding war, and the possibility of dealing on a property that would never have come to market. These are process advantages. They do not replace a valuation.
