Property valuation in Spain: how the tasacion works and what Order ECO/805/2003 requires (2026)

A property valuation in Spain, the tasacion, is the formal figure a bank relies on to decide how much it will lend against a home. It is not a survey, not an asking price and not a tax assessment; it is a legally defined number produced under Order ECO/805/2003 by a homologated society of tasacion or an approved bank service, using one of four prescribed methods the law attaches to the property type. The result almost always lands below the asking price because the principle of prudencia is mandatory for mortgage purposes, which strips out speculative and volatile elements. This guide sets out how the framework works, who the perito tasador is, and what each of the four Spanish value figures actually means for a buyer.

Key takeaways

• A tasacion is a regulated mortgage valuation, not an asking price or a survey, and only a Banco de España homologated society or approved bank service may produce one.
• Order ECO/805/2003 prescribes four valuation methods, cost, comparison, income capitalisation and residual, and the tasador must apply the one the rules attach to the property type.
• The principle of prudencia is mandatory for mortgage valuations, so the bank figure is the sustainable long term lending value, not the highest price the market might pay today.
• The tasacion, valor de mercado, valor catastral and valor de referencia de mercado are four distinct figures set by different bodies for different purposes.
• A tasacion certificate expires six months after issue under Article 62 of Order ECO/805/2003.

What is a tasacion and who produces it?

A tasacion is the regulated valuation a Spanish bank uses to set the maximum mortgage it will grant against a property. The figure is produced under Order ECO/805/2003, which governs the valuation of real estate for certain financial purposes including mortgage guarantee, insurance technical provisions and pension fund assets. The Order states in its preamble that it builds on Real Decreto 775/1997, the regulation that sets the regime for homologating valuation services and societies.

Only two types of entity may legally produce a tasacion for mortgage purposes. The first is a sociedad de tasacion homologada, a specialist valuation company approved and registered by the Banco de España. The second is an internal tasacion service inside a credit entity, also homologated and registered. Real Decreto 775/1997, Article 3, sets the structural requirements for a society of tasacion: a minimum number of ten qualified professionals, at least three of whom must be linked professionals with three years of valuation experience, civil liability cover, and a sole corporate purpose limited to valuation. A general estate agent, a notary or a surveyor working freelance cannot produce a legally valid tasacion.

The individual who signs the report is the perito tasador, defined in Article 4 of ECO/805/2003 as the professional who must necessarily subscribe the valuation report. Real Decreto 775/1997, Article 2, defines who qualifies as a professional: architects and architectural technicians (arquitectos and aparejadores or arquitectos tecnicos) for urban property and residential land, and engineers or technical engineers of the relevant speciality for other property types. This is the figure a buyer commissions, indirectly through the bank, when they apply for a Spanish mortgage. If you are weighing whether you also need a structural survey alongside the tasacion, our property survey guide covers the difference.

What does Order ECO/805/2003 actually require?

Order ECO/805/2003 is the technical rulebook for Spanish mortgage valuations. It entered into force on 9 October 2003, six months after publication in the Boletin Oficial del Estado, and it has been amended several times since, most recently by Orden ECM/599/2025 with effects from 12 August 2025. The Order sets out the principles, definitions, methods and formal requirements a tasador must follow.

Article 3 lists the principles that govern every valuation. The most important for a buyer to understand is the principio de prudencia, the principle of prudence. Article 3.1.f states that where several equally probable scenarios exist, the tasador must choose the one that gives the lower valuation. Crucially, Article 3.2 makes prudencia mandatory for valuations used for mortgage guarantee, insurance technical provisions and pension fund purposes. This is the legal mechanism that pulls a bank valuation below an asking price: the tasador is not free to pick the most optimistic number, the law directs them to the prudent one.

Article 4 defines the key values. Valor de mercado (VM) is the price a property could sell for in an orderly private sale between a willing seller and an independent buyer on the valuation date. Valor hipotecario (VH) is a prudent measure of the property’s sustainable long term value that excludes speculative elements. Valor de tasacion (VT) is the figure the Order establishes as the legally valid value for each purpose; for mortgage guarantee it is the valor hipotecario. The distinction matters because a bank lends against the valor hipotecario, not the valor de mercado, and the two can diverge by 10 to 20 percent in a rising market.

What are the four valuation methods under Order ECO/805/2003?

Article 16 of Order ECO/805/2003 prescribes four valuation methods. The tasador does not pick whichever gives the highest number; the Order attaches each method to specific property types and circumstances, and for a mortgage valuation the tasador often calculates several and takes the lowest.

The cost method (Seccion 2, Articles 17 to 19). This calculates a property’s value from the cost of reproducing it, deducting physical and functional depreciation. It is the default for buildings in project, under construction or being renovated, where there is no finished comparable to compare against. The result is the valor de reemplazamiento neto, the net replacement value, which is the gross replacement cost minus age related depreciation.

The comparison method (Seccion 3, Articles 20 to 23). This is the method most buyers recognise. It values a property by comparing it to recent sales and listings of similar properties in the local market, adjusting for differences in location, size, age and condition. Article 23 adds a key rule: when market data is thin or volatile, the tasador must apply a reduction of at least 10 percent, and at least 15 percent where price volatility is high. This reduction, applied to derive the valor por comparacion ajustado, is one of the structural reasons a bank valuation sits below an asking price.

The income capitalisation method (Seccion 4, Articles 24 to 33). The Order calls this the metodo de actualizacion de rentas. It values a property by discounting its future rental income back to a present value, requiring a representative rental market with at least six comparable rent data points or an active lease on the subject property. It is used for income producing property such as rental apartments, commercial premises and hotels.

The residual method (Seccion 5, Articles 34 to 36). This values land and development projects by subtracting the cost of construction, promotion and commercialisation from the expected sale value of the finished units. It comes in two forms, a dynamic procedure using expected cash flows and a static procedure using present values, and it applies to urban land, buildings in project and buildings under renovation.

For a finished home, Article 45 sets the rule a buyer most often meets: the valor de tasacion for mortgage purposes is the valor hipotecario, and for a standard owner occupied or empty residential property it is the valor por comparacion, adjusted where required. Where comparison is not possible, the tasador falls back to the income method, and if that is not possible either, the value is capped at the net replacement value. This cascade, always ending at the prudent figure, is the framework that governs what number the bank sends back.

How do the four Spanish property values differ?

A buyer in Spain will meet at least four distinct value figures, and confusing them is one of the most common and costly mistakes. They are set by different bodies, for different purposes, and they are not interchangeable.

Value figure	Spanish term	Who sets it	What it is used for	Basis
Mortgage valuation (tasacion)	Valor de tasacion / valor hipotecario	A homologated society of tasacion or bank service, under Order ECO/805/2003	The figure a bank uses to set the maximum mortgage	Prudent valuation, excludes speculative elements
Market value	Valor de mercado	A tasador or any qualified valuer	A reference for negotiation, not a binding bank figure	The price in an orderly sale between independent parties
Cadastral value	Valor catastral	The Catastro (Direccion General del Catastro)	The base for IBI (council tax) and other municipal taxes	Administrative valuation, usually well below market
Referential market value	Valor de referencia de mercado	The Catastro, under Ley 11/2021	The taxable base for ITP, AJD and inheritance or gift tax since 1 January 2022	A fiscal reference, can sit above or below the sale price

The tasacion and the valor de mercado are both produced by a valuer, but only the tasacion is the legally binding figure for a mortgage, and it is always the prudent one. The valor catastral is an administrative figure used for local taxes and is typically a fraction of market value; our catastral value guide explains how it is set and why it matters. The valor de referencia de mercado is newer and more consequential for a buyer’s tax bill: introduced by Ley 11/2021 and effective from 1 January 2022 under a Resolucion of the Direccion General del Catastro of 10 November 2021, it is the base on which transfer tax is now calculated, not the declared sale price. A buyer who ignores it can face a tax assessment higher than the purchase suggests.

Why does the bank valuation come in lower than the asking price?

The gap between the asking price and the bank valuation is not the bank trying to lend less. It is a structural feature of the Spanish valuation framework, and three legal rules drive it.

First, the principle of prudencia (Article 3.1.f) forces the tasador to choose the lower figure where scenarios are equally probable, and Article 3.2 makes this mandatory for mortgage valuations. Second, Article 23 requires a minimum 10 percent reduction, or 15 percent in volatile markets, to the comparison value to derive the adjusted figure the bank uses. Third, the valor hipotecario by definition excludes speculative elements, so any premium the seller is banking on, a rumoured infrastructure project, a hoped for zoning change, a short term price spike, is stripped out by law.

The practical consequence is a worked example. A seller lists an apartment at EUR 500,000. The tasador finds five comparable sales averaging EUR 460,000, applies a 10 percent reduction under Article 23 for a thin data set, and the valor por comparacion ajustado lands at EUR 414,000. The bank will lend a percentage of that figure, say 80 percent, which is EUR 331,200, against a purchase price of EUR 500,000. The buyer must cover the EUR 168,800 gap, negotiate the price down, or walk away. This is the scenario our mortgage valuation challenge guide addresses in detail, and the non resident mortgage guide sets out how much a foreign buyer can actually borrow.

How long is a tasacion valid and what happens when it expires?

A tasacion certificate is not valid indefinitely. Article 62 of Order ECO/805/2003 sets the rule: the date of issue of the report cannot be more than two months after the last physical inspection of the property, and the certificate expires, necessarily, six months after its date of issue. After six months a bank will not accept it for a mortgage decision and a fresh inspection and report are required.

The two month rule between inspection and issue prevents a tasador from relying on stale site data. The six month expiry means a buyer who commissions a tasacion, then delays the mortgage application beyond half a year, pays for the valuation twice. In a fast moving market the expiry also protects the bank: a valuation done in January tells the lender nothing reliable about conditions in August.

What should a buyer do before commissioning a tasacion?

Three checks make the process cheaper and more predictable. First, compare the asking price to recent registered sale prices, not to listing portals, because listings are asking figures and are systematically inflated. Our cost of buying guide sets out the full acquisition cost framework, roughly 12 to 15 percent on top of the price, that the tasacion feeds into.

Second, check the valor de referencia de mercado on the Catastro before you commit. If it sits above your agreed price, your transfer tax bill will be calculated on the higher figure, and you may need to budget for the difference or prepare to challenge it.

Third, if you suspect the valuation will come in low, line up a second homologated society in advance. A bank will usually accept a tasacion from any society on the Banco de España register, not only its preferred one, so having a second quote ready can save a week of negotiation if the first figure caps your mortgage. The tasacion is a legal document, not a negotiation, but knowing the framework lets you read the number it returns and plan around it.

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.