Challenging a Bank Valuation in Spain: When the Tasacion Comes In Too Low and What You Can Do (2026)

A Spanish mortgage valuation (tasacion hipotecaria) can come in below the price you agreed to pay, and when it does, the bank lends against the lower figure. That gap falls on you in cash. Spanish law gives the borrower the right to choose the valuer and to present a second report: the bank cannot force you to use its in-house tasadora, and it must accept any certified valuation that has not expired. Since August 2025, the valuation rules themselves have changed, with sustainability and energy efficiency now part of the calculation. Here is how the challenge process works, what it costs, and when it is worth the effort.

What is a tasacion hipotecaria and who orders it?

A tasacion hipotecaria is the regulated property valuation a Spanish bank requires before granting a mortgage, produced by a valuation company homologated and supervised by the Banco de Espana. Article 13 of Ley 5/2019 requires that any property offered as mortgage security be valued before signing, by a society or professional independent from the lender, using internationally recognised valuation standards set out in Orden ECO/805/2003.

The valuation produces two figures: the valor de mercado (market value at the time of inspection) and the valor hipotecario (mortgage value), a prudential figure that excludes speculative elements and short-term price swings. Banks lend against the lower of the tasacion or the purchase price. The valor hipotecario typically sits 5 to 15 per cent below the asking price a listing portal shows, because it is built on comparable registered transactions and sustainable long-term assumptions, not on what a seller hopes to receive.

Since Ley 5/2019 came into force on 16 June 2019, the borrower pays for the tasacion (Article 14.1.e.i). This was a deliberate reform: by making the client the paying party, the law also gave the client the right to choose the valuer. The Banco de Espana’s criteria state that the bank must accept a valuation the client provides, as long as it is certified by a homologated valuer and has not expired. The expiry window is six months from the date of issue.

How does the independence framework protect you?

The valuation company’s independence from the lender is not just a Banco de Espana guideline. It is a statutory requirement with a sanctioning regime behind it. Ley 41/2007 reformed the mortgage market law to establish that valuation companies whose turnover depends significantly on a single credit institution must operate a internal conduct regulation to prevent conflicts of interest, and that banks issuing mortgage-backed securities with in-house valuation services must constitute a technical commission that verifies independence compliance and reports annually to the Banco de Espana.

The 2013 reform (Ley 1/2013) went further, prohibiting credit institutions from holding significant stakes in valuation companies. The practical effect for a borrower is this: the tasadora that values your property is legally required to be independent of the bank that will lend against it, and the Banco de Espana supervises that independence. If you suspect the first valuation was influenced by the lender’s commercial interest in a lower loan, the independence framework is your procedural leverage when you escalate.

Why does the valuation come in below the purchase price?

The tasacion is built on the principle of prudencia (prudence). Orden ECO/805/2003 requires the valuer to use comparable registered sale transactions in the area, the property’s physical condition, legal status and location, and to exclude speculative elements. A seller’s asking price is a wish, not a transaction. If comparable registered sales in the zone come in lower, the tasacion will reflect that.

Common reasons a tasacion falls short of the agreed price include a softening micro-market where recent registered sales are below current asking levels, a property with unlicensed extensions or planning irregularities that the valuer must flag, or a purchase price negotiated in a thin market with few comparable transactions. The Banco de Espana’s Cliente Bancario portal notes that the valuer visits the property, measures every room, photographs it, attaches examples of real local transactions and checks for planning irregularities.

The practical consequence is the loan-to-value (LTV) calculation. Tinsa, a Banco de Espana-approved valuation company, reports that standard Spanish residential mortgages do not exceed 80 per cent of the tasacion, second homes and investment properties drop to around 60 per cent, and land transactions can fall to 50 per cent. Non-resident buyers typically receive 60 to 70 per cent. If your agreed price is EUR 500,000 and the tasacion comes in at EUR 440,000, the bank lends against EUR 440,000. At 70 per cent LTV that is EUR 308,000, not the EUR 350,000 you might have expected at the full price. The EUR 42,000 difference is yours to find in cash.

How has the 2025 sustainability change affected valuations?

Orden ECM/599/2025, published 12 June 2025 and in force two months later, modified Orden ECO/805/2003 to introduce a sustainability principle alongside the existing prudence principle. The reform requires valuers to incorporate environmental factors into the valuation, to the extent those factors affect market value. These include energy efficiency, climate adaptation, air and water pollution, resource efficiency, waste generation and biodiversity protection.

The change matters for a buyer challenging a low valuation in two ways. First, a property with a strong energy performance certificate (EPC rating A or B) may now value higher than an otherwise identical property with a poor rating (F or G), because the valuer must consider the lower running costs and the growing obligation to retrofit inefficient buildings under EU Directive 2024/1275. Second, if the first valuer did not account for a recent energy renovation, that omission is a concrete basis for a second opinion: the sustainability principle is now a valuation standard the first report should have applied.

The reform also introduced new rules for pre-licence administrative authorisations that some town halls issue for buildings under construction or renovation, allowing valuers to use these authorisations as valid documentation for a tasacion when they meet certain requirements. For a buyer of an off-plan or renovated property, this broadens the documentation a valuer can accept.

How can you challenge a low valuation?

The challenge process is straightforward because the law already puts the choice of valuer in the borrower’s hands. You do not need the bank’s permission to commission a second tasacion.

Step 1: Request the full tasacion report

The first tasacion is a document you paid for, so you are entitled to the full report, not just the certificate with the final figure. Request it from the valuation company directly. Read the comparable transactions the valuer used, the physical inspection notes, and any condicionantes (conditions or caveats) flagged. If the valuer used stale comparables from a slow period, missed a recent renovation, or did not account for the property’s energy performance under the 2025 sustainability principle, that is your basis for a second opinion.

Step 2: Commission a second tasacion from another approved valuer

Order a second tasacion from a different Banco de Espana-approved valuation company. The Banco de Espana maintains a public registry of homologated tasadoras. A residential valuation typically costs EUR 300 to EUR 500 in 2026, depending on property size. You can use the same second report with any other lender, so the cost is a one-time investment, not a per-bank fee.

The second valuer applies the same Orden ECO/805/2003 standard, but may use different comparable transactions, inspect on a different date, or weigh the property’s condition and sustainability features differently. If the second report comes in materially higher, you have a lever.

Step 3: Present the second valuation to your lender

Present the second tasacion to the bank’s mortgage department. Under Banco de Espana criteria, the bank must accept a certified valuation that is not expired, and may run its own checks on the report at no cost to the client. The bank cannot reject it simply because it came from an external tasadora.

Step 4: Choose your buyer option

When you hold a second valuation that supports a higher figure, you have three options.

Renegotiate the LTV with your current lender. If the second tasacion closes the gap, ask the bank to recalculate the loan against the new figure. The bank’s own affordability assessment is unaffected, so a higher valuation that stays within the LTV band should translate directly into a larger loan.

Switch lenders. Because the second report is portable and valid for six months, you can take it to a competing bank without paying for a third tasacion. For a non-resident buyer this matters: the non-resident mortgage process already takes six to ten weeks, and a valuation dispute should not restart that clock.

Walk away under arras. If the valuation gap is large and neither the second report nor renegotiation closes it, a low tasacion can trigger a financing contingency in your arras contract. Spanish arras contracts often include a clause making the purchase conditional on mortgage approval, and a low valuation that reduces the loan below the required amount can trigger that condition, allowing you to recover your deposit rather than cover an unaffordable cash gap.

When does challenging the valuation make economic sense?

The decision turns on the gap size and the cash implication. The table below sets out the arithmetic at three LTV bands.

Scenario	Agreed price	First tasacion	LTV band	Loan at first tasacion	Loan if second tasacion matches price	Cash gap recovered
Resident, primary home	EUR 500,000	EUR 440,000	80%	EUR 352,000	EUR 400,000	EUR 48,000
Non-resident, second home	EUR 500,000	EUR 440,000	60%	EUR 264,000	EUR 300,000	EUR 36,000
Non-resident, investment	EUR 500,000	EUR 440,000	70%	EUR 308,000	EUR 350,000	EUR 42,000

Against a second tasacion cost of EUR 300 to EUR 500, the cash gap recovered in every scenario above runs from EUR 36,000 to EUR 48,000. The challenge pays for itself many times over when the gap is material. When the gap is small (under EUR 10,000 at the LTV), the second valuation fee may not be worth it, and negotiating the price down with the seller is the better route.

What if the bank refuses to accept the second valuation?

The Banco de Espana’s complaints process gives you a structured escalation path. First, file a formal complaint with the bank’s own Servicio de Atencion al Cliente (SAC) or Defensor del Cliente. The bank has a fixed period to respond. If it rejects the complaint or fails to answer in time, you can escalate to the Banco de Espana’s Departamento de Conducta de Entidades.

The Banco de Espana issues a report within 90 days of the complete file being submitted. The report is non-binding, but it carries supervisory weight: the bank must state whether it accepts the conclusion, and the statistics are published. In practice, most valuation disputes that reach the Banco de Espana are resolved at the internal complaint stage, because banks prefer not to appear in the supervisor’s adverse statistics.

The judicial route exists but is rarely needed for a valuation dispute. If the administrative path fails and the amount at stake justifies it, the final step is a civil claim, though the cost and timeline of litigation make this a last resort.

What is the valor de referencia and does it help?

The Catastro’s valor de referencia is the cadastral reference value used for transfer tax (ITP) and inheritance tax calculations. It is not a market valuation and a bank will not lend against it. But it is a useful floor figure: if your tasacion comes in below the valor de referencia, the valuer may have over-applied the prudence principle, and the Catastro figure is an objective reference point to cite in a complaint. The valor de referencia is published annually and can be checked free on the Catastro portal. For a deeper comparison of the four Spanish property valuations, see our valuation bases guide.

What should you do before the first valuation to avoid a low result?

The best time to influence the tasacion is before the valuer visits. Prepare the property: complete any minor repairs, ensure all renovations have the correct licences (the valuer checks for illegal builds), and gather documentation of any improvements with their permits and your energy performance certificate. A property with unregistered extensions will be valued as if those extensions do not exist, or flagged with a condicionante that lowers the mortgage value. Since the 2025 sustainability reform, the EPC is now a document the valuer should consider, so have it ready.

Make sure the valuer can access every room, the roof terrace and any storage. The Banco de Espana confirms the valuer measures every room and photographs the property, so access matters.

One more protection: Banco de Espana criteria say the bank should postpone the tasacion until it has assessed your creditworthiness, and should not charge you for the valuation if denial indicators already exist. If the bank orders the tasacion before checking your income and then denies the mortgage on affordability grounds, you may have grounds to challenge the fee. The valuation fee is the borrower’s responsibility under Ley 5/2019, but the Banco de Espana calls it a mala practica (bad practice) to charge it when the loan was already unlikely to proceed.

The bottom line

A low Spanish bank valuation is not the end of the mortgage process. The borrower’s right to choose the valuer, the portability of the report across lenders, and the six-month validity window make the second-tasacion route a practical, low-cost challenge. The EUR 300 to EUR 500 fee for a second valuation is small against the tens of thousands of euros in loan capacity it can recover. If the bank resists, the Banco de Espana’s complaints process is the backstop, and the Catastro’s valor de referencia is a useful objective floor. For most buyers, the right sequence is: read the first report, commission a second tasacion, and use it to renegotiate or switch lenders before considering a formal complaint.

This guide is general information, not legal or tax advice. Rules change and individual circumstances differ. Verify current requirements with an independent lawyer (abogado) or tax advisor (gestor/asesor fiscal) before acting.