Buying property in Marbella as an American.

In most US states the deed and its consideration become public record at the county recorder's office; the portals' "last sold" fields and price-history charts are built on that record, and the MLS adds mandatory sold-price fields brokers can query. Spain has neither layer, at any price point. The price on an individual escritura never reaches the public record; notaries and registrars publish only lagged, area-level aggregates. No portal, agent or valuer in Spain can look up what the villa next door closed for — this desk included.

The listing side is thinner than it looks, too. Broker-sharing networks exist and the Costa del Sol runs on them, but there is no compulsory single database, no exclusivity norm, and no sold-price field anywhere in the chain. The same residence routinely appears with several agencies at more than one asking price, photographed in different decades.

The consequence follows directly. Any Marbella source quoting sold-price medians, days-on-market, year-on-year appreciation or "percentage over asking" is estimating at best and inventing at worst — the underlying data does not exist in public form. What can be measured honestly is the asking side, with the method attached: a deduplicated register, a floor, a sample size, a date. That is what the table above is, and the method is documented on the Marbella Property Index.

Spain publishes no per-property closing prices and has no US-style MLS. There is no public record of what any Marbella home sold for, so no source — Muse Selection included — can honestly quote sold-price medians, days-on-market or year-on-year appreciation. The only honest Marbella price data is asking-price data carrying a sample size and a date.

The Muse Selection register tracks every live Costa del Sol listing at or above €1,500,000 across three deduplicated feeds, re-measured on every snapshot. On 7 August 2026 it held 579 priced listings across all zones, with a median asking price of €2,950,000 and a median €6,867 per square metre. The Golden Mile, Nueva Andalucía and Benahavís rows in the table above illustrate the spread, and each re-measures on its own.

One absence is deliberate. Sierra Blanca carries no published median on this register, because fewer than four listings under the strict label hold published asking prices. A median computed on a sample that thin would describe individual residences, not a market, and would swing by millions between snapshots. We publish the refusal instead of the noise.

The register quotes euros because Spanish contracts complete in euros. No dollar figure appears on this page, because any dollar figure is a function of the day you fix the rate. The sensitivity is easy to hold in mind: each one-cent move in the euro–dollar rate changes the dollar cost of an all-zone median of €2,950,000 by $29,500. Between offer and completion — eight to sixteen weeks, a working range rather than a promise — that is a live, unhedged position unless you close it. Forward contracts and staged conversion exist for exactly this purpose; the conversation belongs at offer, not at completion. The desk introduces FX specialists and takes no currency view of its own.

On the Muse Selection live register (snapshot 7 August 2026, floor €1.5M), the median asking price across all tracked Costa del Sol zones was €2,950,000 at €6,867/m² (n=579). Zone medians on the same day: Marbella Golden Mile €4,290,000 at €8,987/m² (n=57); Nueva Andalucía €4,289,000 at €8,652/m² (n=59); Benahavís €4,900,000 at €7,409/m² (n=81). All figures are asking prices; Spain publishes no closing prices.

A US closing runs through neutral infrastructure: an escrow agent holds the funds, a title company insures the title, and the buyer's exposure is procedural. A Spanish purchase runs on a private contract called the contrato de arras, and the American buyer should understand it before signing anything. Under the penitential form rooted in Article 1454 of the Código Civil, the buyer pays a deposit — ten per cent is the customary figure at this register — and either side may still walk away: the buyer by forfeiting the deposit, the seller by returning it doubled.

There is no regulated escrow profession to hold that deposit. In practice it sits with the seller, the seller's lawyer or the agency's client account — which of these, and on what release terms, is negotiated, not standardised. Getting that clause right is the first concrete job of the buyer's lawyer, and it is one reason the lawyer should be instructed before the offer, not after.

The notary is the other culture shock. A Spanish notary is a public official who verifies identity, legality and the parties' understanding of the deed. The notary is not your agent, not an escrow holder and not a title insurer. Title assurance comes instead from the Registro de la Propiedad and the Nota Simple extract your lawyer pulls and re-pulls against it — the due-diligence stack itemises the full document set, and the escritura walkthrough covers what actually happens at the signing table.

One Spanish mechanism will feel familiar in mirror image. Americans know FIRPTA — the withholding regime when a foreign person sells US real estate. FIRPTA plays no role in a Spanish purchase. But Spain runs the reverse: when the seller is a non-resident of Spain, the buyer must retain 3% of the price and pay it to the tax agency via Modelo 211 within one month, on personal liability if missed (Article 25.2 of the IRNR law). At this register many Marbella sellers are non-resident, so the retention is routine rather than exotic — and it will apply again, on the other side of the table, when the American eventually sells as a non-resident.

An American buyer's tax position does not simplify by crossing the Atlantic; it doubles. US citizens remain taxable on worldwide income wherever they live. The US–Spain income tax treaty (1990, protocol in force since 2019) prevents most double taxation through credits, but the annual US filing obligation never lapses.

The disclosure stack is symmetrical. On the US side: FBAR (FinCEN Form 114) once aggregate non-US financial accounts exceed $10,000 at any point in the year, and FATCA Form 8938 at thresholds that depend on filing status and where the taxpayer lives. On the Spanish side — only if the buyer becomes Spanish tax resident, broadly at 183 days or a Spanish centre of economic interests — Modelo 720, the declaration of foreign assets: three categories, each triggered at €50,000, covering the buyer's US bank accounts, US securities and US real estate. The regime's once-notorious penalties were struck down by the Court of Justice of the EU in C-788/19 (27 January 2022) and rebuilt proportionately by Ley 5/2022; the Modelo 720 walkthrough covers the current mechanics and the 31 March deadline.

The symmetry produces one quiet, checkable result. Held directly in personal name, the Marbella residence itself generally appears on neither form: directly held foreign real estate is not a reportable financial account for FBAR or Form 8938 purposes, and the home is a Spanish asset, so it sits outside Modelo 720's foreign-asset scope. The bank accounts around the purchase are what appear — on both sides. Hold the property through an entity and the analysis changes entirely. This is precisely the kind of surface on which the desk introduces dual-qualified US–Spain advisers rather than advising itself; confirm the treatment for your own structure before completion, not after.

For an American who becomes Spanish tax resident, the disclosure stack is a mirror: FBAR and FATCA report the Spanish accounts to Washington, Modelo 720 reports the US assets to Madrid. Held directly, the Marbella home itself generally appears on neither form — it is not a financial account for FBAR/8938, and it is not a foreign asset for Modelo 720. The bank accounts around it appear on both. Entity ownership changes the analysis; dual-qualified advice is the prerequisite, not the luxury.

Two further US-side surfaces deserve a line each. First, the IRS computes capital gains in dollars, at the exchange rates of the purchase and sale dates — so currency movement alone can manufacture a taxable US gain on a residence whose euro price never moved, or erase one that did. Model this before buying, because the purchase date fixes half the equation. Second, the 1990 treaty covers income taxes only; there is no US–Spain estate-tax treaty. Spanish inheritance tax applies to Spanish-situs assets — softened substantially for spouses and descendants by Andalucía's 99% bonificación — while US estate tax runs on a citizen's worldwide assets regardless. The two systems overlap under unilateral credit rules, not a treaty, and the time to structure for that is before the escritura names an owner.

Spain's investor residence programme — the "golden visa" that once attached a residence permit to a €500,000 property purchase — was repealed in its entirety by Ley Orgánica 1/2025, with effect from 3 April 2025. Applications filed before that date are processed under the old rules; nothing filed after it qualifies, and no investment amount of any kind now purchases Spanish residency. Any adviser still selling a property-for-residency package is selling something that does not exist — the golden visa update documents the repeal and what survived it.

What actually exists for Americans in 2026: the Non-Lucrative Visa, for buyers with passive income above a threshold set as a multiple of Spain's IPREM index (revised annually — confirm the current figure) who intend to live in Spain; the Digital Nomad Visa from the 2022 Startups Law, for remote work serving non-Spanish employers; and the non-investment permits of Ley 14/2013 — entrepreneur and highly-qualified routes — for those building or running something here.

The Beckham regime deserves its own caution, because it is chronically oversold to Americans. It is a tax regime, not a visa: qualifying new residents pay a flat 24% on Spanish-source income up to €600,000 (47% above) for up to six years, with foreign-source income largely outside Spanish scope. For most nationalities that is a clean win. For Americans it is narrower, because US worldwide taxation continues regardless, and the interaction between the regime, the treaty and foreign tax credits decides whether the flat rate helps or merely relabels — the Beckham guide maps the 2026 rules, and a dual-qualified adviser should run the numbers on your income shape before you elect anything.

And the option Americans most often overlook: owning without residency at all. Below 183 days a year, the buyer remains a US tax resident holding a Spanish asset, files Spanish non-resident tax on imputed or rental income — the IRNR guide covers the quarterly mechanics — and never touches Modelo 720. For a second home used ten weeks a year, that is frequently the cleanest stack on both sides of the Atlantic.

The sequence, from first call to keys: a written brief with the desk — register, zones, timeline, structure; a curated list from the published catalogue and, where the brief warrants it, off-market candidates by introduction; viewings; an offer drafted with the buyer's lawyer of record already instructed; arras with a negotiated deposit-holding clause; NIE and bank account in parallel; due diligence against the registry; completion before notary, in person or by power of attorney; registration. Eight to sixteen weeks from offer to title is the working range the desk plans around — individual files run faster and slower.

The cost stack on top of the price is itemised in the fees breakdown: in Andalucía, 7% ITP on a resale, or 10% IVA plus 1.2% AJD on a new build, plus notary, registry and legal fees. Patrimonio, the Spanish wealth tax, is a separate annual question in which a regional rebate and a state-level backstop interact — that is covered in the Patrimonio and Solidaridad guide, not here. The broader process, for any nationality, is covered step by step in buying property in Marbella.

A closing concession, because it is true: the Muse desk is not a tax adviser, an immigration lawyer or a currency house, and an American buyer at this register needs all three. What the desk holds is the register, the introductions and the transaction itself — and the discipline to say, at every step above, which numbers are measured and which cannot be known.