The pattern became visible around 2021 and has not reversed. French buyers — not tourist visitors, but principals moving capital — arrived on the Costa del Sol in numbers that are now a structural feature of the upper market rather than a cyclical wave. The reasons are legible, if not always stated plainly: a wealth tax that never went away, a political environment that has made holding significant French real-estate feel exposed, and an Iberian coast that sits, from Paris or Lyon, roughly the same flight time as the Alps.
The IFI and the logic of relocation
France's Impôt sur la Fortune Immobilière, introduced in 2018 as a narrowed successor to the ISF, applies to net real-estate assets above €1.3 million at rates rising to 1.5%. For a principal holding a Paris apartment and a French country property, the annual levy is not incidental. Over a decade it compounds into a material drag on net worth that a reorganisation of the asset base can materially reduce.
Spain's own wealth tax has its complexities — the national *Impuesto sobre el Patrimonio* was effectively replaced at the top end by the *Impuesto de Solidaridad de las Grandes Fortunas* from 2023, and Andalucía's longstanding 100% regional wealth-tax rebate operates within that shifting national framework. The point, for French buyers, is not that Spain is a tax-free destination. It is that the combination of jurisdictions, structured thoughtfully, can produce a meaningfully different outcome than remaining entirely within the French fiscal perimeter. Any restructuring of this kind requires advice from qualified tax counsel in both jurisdictions. The figures here are contextual, not prescriptive.
Where French buyers land on the coast
Geography matters. French buyers on the Costa del Sol cluster, broadly, at two ends of the coast. Marbella centre and the Golden Mile attract buyers who want proximity — restaurants, medical facilities, the infrastructure of a town — and who are often maintaining French tax residency rather than relocating it. Sotogrande, at the western end of the coast near Gibraltar, draws a different profile: buyers with longer time horizons, often with children in the international schools, and a stronger preference for established community over new-build.
The Golden Mile — the four-kilometre stretch between Marbella and Puerto Banús — trades at around €11,200 per square metre, with eighty-four transactions recorded in 2025 and an average hold tenure of fourteen years. That tenure figure matters. Buyers here are not speculating on liquidity events; they are acquiring a position they expect to maintain across a generation. The market's off-market share, now approaching 48% across the upper Marbella register, means that a significant proportion of what changes hands never appears on a public listing. For French buyers arriving through their own networks, this can create a false impression that inventory is thin. It is not thin — it is largely invisible without the right access.
Sierra Blanca, on the southern slope of La Concha some three hundred metres above sea level, also sees French interest. Its thirty-one trades in 2025, off-market share of 44%, and pricing around €9,400 per square metre reflect a market that absorbs demand quietly. The elevation matters to buyers who have thought carefully about summer heat and privacy simultaneously.
The SCI: a vehicle under scrutiny
A significant share of French buyers have historically used the *Société Civile Immobilière* as their acquisition vehicle. The SCI is a standard French holding structure — a civil property company that allows co-ownership, succession planning across generations, and, in some configurations, the deconsolidation of real estate from a personal balance sheet for IFI purposes. For a French family acquiring a second home in Spain, its familiarity and flexibility made it the default.
The Spanish tax authority, the Agencia Tributaria, has tightened its treatment of foreign SCIs holding Spanish property. The core issue is transparency. Spain's domestic real-estate holding companies operate within a framework of disclosure obligations that the Spanish authorities have progressively applied, by analogy, to incoming foreign structures. SCIs that were adequate vehicles in 2018 may now attract closer scrutiny on rental income, imputed income, and capital-gains treatment on disposal. The bilateral tax treaty between France and Spain — the 1995 convention and its subsequent protocols — governs how income and gains are allocated between the two jurisdictions, but treaty protection does not resolve every domestic compliance question that the Agencia Tributaria can raise.
In practice, this means that buyers arriving with an SCI already in mind should take specific Spanish legal and tax advice before completing. Some buyers have moved to Spanish *Sociedad Limitada* structures or to direct personal ownership, depending on their succession and tax position. Neither is universally preferable. The choice depends on factors — residency, existing asset base, family structure, planned hold period — that vary at the individual level. For a fuller orientation on how Spanish property tax applies to foreign structures and non-resident owners, [the current framework is set out in our guide to Spanish property tax in 2026](/guides/spanish-property-tax-2026).
Residency, non-residency, and the practical middle ground
Not all French buyers are seeking to leave France. A material cohort — in our experience, the majority of those acquiring in the €1.5 million to €4 million range — intend to maintain French tax residency and use a Marbella property as a second home. This is a coherent position. Spain and France have a functioning double-tax treaty, and non-resident ownership of Spanish property is a well-worn path with defined obligations: non-resident income tax (*IRNR*) on imputed or actual rental income, Spanish wealth-tax exposure on the Spanish asset, and Spanish capital-gains tax on disposal, with treaty mechanisms to prevent double taxation in France on the same gain.
What makes this viable practically, not just legally, is the direct air connection. From Paris CDG, Marbella's nearest airport — Málaga — is consistently under two and a half hours. Lyon Saint-Exupéry runs at roughly similar times to Málaga. Neither route requires a connection. A buyer maintaining a Paris primary residence can reach a Costa del Sol property for a long weekend with less friction than reaching a Provençal house by road. That operational fact has altered the psychology of acquisition. Buyers who might previously have considered a second home only within France, to avoid complexity, now find southern Spain logistically accessible enough to sit within the same mental category.
What the 2025–2026 market reflects
The broader off-market trend along the upper coast — share rising from roughly 30% in 2018 to approximately 48% in 2025 — correlates, partly, with the profile of buyers now transacting. French principals, like other European HNW buyers in this segment, tend to prefer discretion in both directions: they do not want their acquisition publicly visible, and they are acquiring from vendors who feel the same. The result is a market that clears through relationships and advisory networks rather than listings platforms.
La Zagaleta, the 9-square-kilometre private estate above Benahavís, illustrates the extreme end of this dynamic. Twenty-three secondary-market trades in 2025, off-market share of 62%, pricing around €14,800 per square metre. A French buyer looking at Zagaleta would typically have no practical route to the relevant inventory without an advisory already operating inside the estate's transaction flow. The same applies, to varying degrees, to Cascada de Camoján — the roughly seventy-five plot enclave above Marbella — and to the upper tier of Sierra Blanca.
A long position on a familiar coast
What the French buyer cohort on the Costa del Sol shares, across its different sub-profiles, is a time horizon that tends toward the long. These are not buyers chasing a two-year appreciation cycle. They are establishing a European anchor outside France — one that combines climate, infrastructure, and, with appropriate structuring, a more manageable relationship with the assets they have built.
The coast absorbs this capital steadily. Golden Mile tenure of fourteen years suggests that once a position is established, it is rarely unwound quickly. The buyers who arrived in 2021 are, for the most part, still here. What the next cohort finds available will depend less on what is listed than on what the advisory layer can surface — which is, in a market where nearly half of all upper-end transactions are invisible to the public, the more relevant question.