The Banco de España assesses Spanish housing as 1.1% to 8.5% above its estimated fundamental value and has explicitly declined to call it a bubble. The European Central Bank notes the overvaluation is accelerating. Both concern the national aggregate, which transacts at 1,973 €/m² against Marbella’s 4,665 €/m² (Portal Estadístico del Notariado, rolling twelve months to 1 August 2026).
What the institutions have actually said
Two supervisory statements circulate about Spanish house prices, and most commentary on them is a paraphrase of a paraphrase. Here is only what we can attribute.
Published valuation assessments of the Spanish national housing market by the Banco de España and the European Central Bank, as summarised at 1 August 2026. We hold no document reference or publication date for either statement, and the sources block below says so.
| Institution | Assessment | What the assessment is about |
|---|---|---|
| Banco de España | Housing prices 1.1% to 8.5% above estimated fundamental value | The Spanish national housing aggregate, not any region or municipality |
| Banco de España | Explicitly declines to describe the market as a bubble | The same national aggregate; the governor-level position is no bubble, with credit growth under monitoring |
| European Central Bank | Notes that the overvaluation is accelerating | Spanish housing at national level, within euro-area supervision |
The range itself is the first thing worth reading properly. A band running from 1.1% to 8.5% is not a precise finding. It is the output of models estimating what prices “should” be given incomes, rents, interest rates and demographics, and the width of the band admits that the answer depends heavily on which model you trust. At the bottom of the range the market is essentially fairly valued; at the top it is modestly expensive. Neither end is a crisis reading, and the central bank has said so in the plainest way available to it — by declining to use the word bubble when it had every opportunity to.
The ECB’s contribution points the other way and should not be waved off. An overvaluation that is accelerating is a different situation from one that is stable at the same level: the gap between price and fundamentals is opening rather than closing. That is why I would not treat the absence of a bubble call as an all-clear.
Why “overvalued” is really a statement about credit
When a central bank says a housing market is above fundamental value, it is describing a risk to the banking system, not making an aesthetic judgement about prices. The mechanism that turns expensive housing into a supervisory problem is lending: borrowers taking on debt against inflated collateral, banks holding that debt, and a price correction impairing both at once. Absent credit, an overvalued asset is a bad investment for whoever bought it; with credit, it is a systemic issue.
That is why the governor-level position is phrased as it is — no bubble, but credit growth is being monitored. The monitoring is the point, and the national financing data shows why the Spanish aggregate is legitimately a credit story.
Mortgage financing of residential purchases in Spain, May 2026. Source: Consejo General del Notariado, statistics centre, data for May 2026, released 30 July 2026.
| Measure | Value, May 2026 |
|---|---|
| Share of purchases using a mortgage (%) | 54.8 |
| Average loan-to-price (%) | 72.5 |
| Average purchase mortgage (€) | 181,976 |
| Purchase mortgages granted, change year-on-year (%) | −4.0 |
More than half of Spanish home purchases are financed, at close to three-quarters of the purchase price. A market built like that transmits interest rates, lending standards and affordability tests straight into transaction counts and, eventually, into prices. The supervisory concern is coherent — for the market it describes.
The arithmetic, and its limits
The average Spanish purchase mortgage of €181,976 (Consejo General del Notariado, May 2026) set against the average Marbella transaction of €788,970 (Portal Estadístico del Notariado, twelve months to May 2026).
| Measure | Value (€) | Source and period |
|---|---|---|
| Average Spanish purchase mortgage | 181,976 | Consejo General del Notariado, May 2026, released 30 July 2026 — national figure |
| Average Marbella transaction value | 788,970 | Portal Estadístico del Notariado, twelve months to May 2026 — municipal figure |
| The first as a share of the second | 23% (ratio, not euros) | Calculated: 181,976 ÷ 788,970 = 0.2306 |
That 23% figure is a mismatch of scale, not a measurement of Marbella financing. It sets a national average loan against a Marbella average transaction — two datasets from the same publisher covering different populations, and I will not pretend otherwise. What it demonstrates is that a loan of typical Spanish size cannot buy a property of typical Marbella size. Whatever funds those purchases is not the national mortgage product.
What we do not have is Marbella mortgage data. The Notariado publishes the financing variables — mortgage share, loan-to-price, average loan — at national level only; the municipal dataset gives prices, volumes, surface areas and buyer nationality. There is no published figure for the proportion of Marbella buyers who borrow, and I cannot construct one. Anyone quoting a precise cash-buyer percentage is estimating. So the honest conclusion is narrower than the convenient one: the national credit channel is a weak guide to this market, but “weak guide” is not “does not apply”. A market at 4,665 €/m² with 60.9% foreign buyers has its own financing profile, and we cannot see it.
The case for concern, which is stronger than the headline suggests
If the argument stopped at the arithmetic above it would be reassurance dressed as analysis. It should not, because the local data contains a genuinely awkward configuration.
Volumes are falling on the Costa del Sol. Málaga province recorded 8,837 residential transactions in the first quarter of 2026 against 9,741 a year earlier — down 9.3%, with resale down 11.0% and March alone down 13.2%. January 2026’s 3,044 transactions were the weakest January in four years, below 2025 (3,105) and 2024 (3,220). The province closed 2025 up 4% at 36,786 transactions, so this is a recent turn, not a long decline. Nationally, home sales fell 11.8% year-on-year in May 2026 to 55,761 — the pattern set out in full in the Spanish housing slowdown analysis.
At the same time, asking prices sit well above transaction prices. Setting Idealista asking data against Notariado deed data gives a gap of 17% to 22% across the three main coastal municipalities.
Asking prices from Idealista (April 2026 for Marbella, June 2026 for Estepona and Mijas) against transaction prices from the Portal Estadístico del Notariado, rolling twelve months to 1 August 2026. The two series are collected differently and are not like-for-like; the gap indicates seller expectation, not a discount you can demand.
| Municipality | Asking price, Idealista (€/m²) | Transaction price, Notariado (€/m²) | Gap (%) |
|---|---|---|---|
| Marbella | 5,596 | 4,665 | −17 |
| Estepona | 4,329 | 3,437 | −21 |
| Mijas | 3,773 | 2,948 | −22 |
Falling volume, rising prices and a wide asking-to-transaction gap is the configuration in which sellers’ expectations run ahead of buyers’. That is not a prediction of a fall. It describes a market where fewer deals close, where the deals that do close are agreed well below the advertised price, and where the published index keeps rising because it records only the transactions that happened. A price series built from completed sales will look healthy for as long as sellers who cannot achieve their price simply do not sell. Volume turns first; price lags.
There is a third strand, and it matters more here than nationally. Foreign purchases across Spain fell 4.4% in the second half of 2025 to 66,629, and the foreign share of all home sales slipped to 18.4% from 19.5% a year earlier and 20.9% in 2023 (Consejo General del Notariado semi-annual report, published 9 April 2026). Marbella is 60.9% foreign-bought on the Portal Estadístico del Notariado’s twelve months to May 2026. A market that concentrated in international demand is exposed to whatever moves that demand — currency, sentiment, tax policy elsewhere — in a way the national aggregate is not. The credit channel may be weak here; it is not the only channel.
What would actually change the picture
I will not forecast prices, and I am sceptical of anyone in this industry who does. What I can set out is what I watch.
- Marbella’s own transaction count. The Notariado’s statistics centre now updates monthly, including at municipality level, so this can be checked from one authoritative source rather than inferred from provincial data. A sustained fall in Marbella volumes would be the first hard local signal.
- The asking-to-transaction gap. A widening gap means sellers are holding out; a narrowing one means expectations are converging. Which side they converge from is the whole question.
- Credit growth at national level. This is the variable the Banco de España says it is monitoring. If lending accelerates and the overvaluation band widens with it, the supervisory tone will change before prices do.
- The foreign-buyer share. Three consecutive falls in the national share is a trend, not noise. Whether Marbella’s 60.9% holds is the figure I would most want to see next.
- Supply-side policy from September 2026. The ICO is due to launch a €12.15bn instrument under the España Crece programme, lending to developers and investors who build and operate affordable rental housing, and the government’s housing decree has been postponed to September for want of a majority. Both target the affordable end rather than prime coastal property, but a material change in national supply eventually reaches every segment.
None of these is a trigger with a threshold. They are what would make me revise the outlook I currently hold, and I would rather name them in advance than explain afterwards why I did not.
Common questions
Is there a property bubble in Spain?
Not according to the Banco de España, which assesses Spanish housing as 1.1% to 8.5% above estimated fundamental value and has explicitly declined to call it a bubble. The ECB has noted the overvaluation is accelerating. Both statements concern the national aggregate. Neither is a finding about Marbella, and neither institution has published a municipal assessment.
Will Costa del Sol prices fall?
I will not forecast that, and no one honestly can. What I monitor instead is Marbella’s monthly transaction count from the Notariado, the 17% gap between Marbella asking and transaction prices, national credit growth, and the foreign-buyer share — which fell nationally to 18.4% in the second half of 2025. Volume turns before price does.
Does the Bank of Spain’s overvaluation figure apply to Marbella?
Not directly. The 1.1% to 8.5% range is modelled on the national aggregate, where transactions average 1,973 €/m² (Notariado, twelve months to 1 August 2026) and 54.8% of purchases were mortgaged in May 2026. Marbella transacts at 4,665 €/m², with an average deal of €788,970 and 60.9% foreign buyers in the twelve months to May 2026. The model’s inputs do not describe this market.
Are Marbella buyers exposed to interest rates?
Less than national buyers, but I cannot tell you by how much. The average Spanish purchase mortgage of €181,976 (Notariado, May 2026) is 23% of the average Marbella transaction of €788,970 (twelve months to May 2026), which shows the scale of the mismatch. It is not a measurement of Marbella financing — no Marbella-specific mortgage data is published, and any precise cash-buyer figure you are quoted is an estimate.
Why are prices rising while transactions fall?
Because a price index records only the sales that completed. Málaga province transactions fell 9.3% in Q1 2026 while Marbella prices rose 7.68% in the twelve months to May 2026. Sellers unable to achieve their asking price withdraw rather than discount, so the recorded average holds up while the market thins beneath it.
Averages are a poor guide to any individual property. If you want the recorded transaction data for a specific sub-area or property type — the numbers behind the Marbella market analysis and the Costa del Sol investment case — get in touch and I will pull the relevant Notariado series.
Sources
- Banco de España — assessment of Spanish housing as 1.1% to 8.5% above estimated fundamental value, and the explicit refusal of a bubble characterisation. We hold no verified document reference, title or URL for this assessment, so it is cited by name only, as summarised at 1 August 2026.
- European Central Bank — observation that the Spanish overvaluation is accelerating. As above, no verified document reference or URL; cited by name only, as summarised at 1 August 2026.
- Consejo General del Notariado, statistics centre — national home sales, prices and mortgage financing, data for May 2026, released 30 July 2026. Retrieved 1 August 2026. notariado.org
- Consejo General del Notariado — semi-annual report on foreign buyers, published 9 April 2026, data for the second half of 2025. Retrieved 1 August 2026. notariado.org
- Portal Estadístico del Notariado — Marbella and Spanish transaction prices and volumes, rolling twelve months to May 2026 and to 1 August 2026. Retrieved 1 August 2026. penotariado.com
- Instituto Nacional de Estadística — residential transaction counts, Málaga province Q1 2026, January 2026 and full-year 2025. Retrieved 1 August 2026.
- Idealista — asking prices, April 2026 for Marbella, June 2026 for Estepona and Mijas. Cited as data only; no link, as the source is a commercial portal.
- Instituto de Crédito Oficial — €12.15bn instrument under the España Crece programme, due September 2026. Retrieved 1 August 2026.