Compulsory purchase in Spain in 2026: expropiacion forzosa, the justiprecio and your right to challenge

How the Spanish state acquires private property for public works, what you are owed, and how to fight an undervalued assessment

Spain can compulsorily acquire your property for a road, rail line, coastal protection scheme or urban plan, but only under a structured legal process that guarantees you a fair price and, in some cases, the right to take it back. The framework is the Ley de Expropiacion Forzosa of 16 December 1954 (BOE-A-1954-15431), still in force today with subsequent modifications, backed by Article 33.3 of the Spanish Constitution. You cannot refuse the transfer itself, but you can negotiate the price, challenge the valuation, and reclaim the land if the project never happens. In 2026, two Supreme Court rulings have tightened how the justiprecio is calculated, pushing compensation upward for expropriated owners.

What is expropiacion forzosa and when can it be used?

Expropiacion forzosa is the legal mechanism by which the Spanish state, a province or a municipality acquires private property compulsorily for a purpose of public utility or social interest. Article 1 of the 1954 law defines it as any forced transfer of private property or patrimonial rights, whether by sale, exchange, lease, temporary occupation or mere cessation of exercise. Article 33.3 of the Constitution underpins it: the law may impose limits on property and compel its transfer for reasons of public utility or social interest, with corresponding compensation.

The law applies to any form of property: land, buildings, shares in a company, concessions, and even movable assets. For a property owner on the Costa del Sol, the most common triggers are infrastructure projects (road widening, rail corridors, coastal defence works under the Ley de Costas), town plan implementation under a PGOU, or heritage acquisition orders. The expropriating authority must be the state, province or municipality (Article 2), though concessionaires and other entities can be the beneficiaries of the expropriation.

What are the stages of the expropriation process?

The 1954 law sets out a four stage cascade: declaration of public utility, declaration of need for occupation, determination of the justiprecio (fair price), and payment plus taking of possession. Each stage has formal requirements and deadlines.

1. Public utility declaration. Article 9 requires a prior declaration of public utility or social interest before any expropriation can begin. For infrastructure included in approved plans of the state, province or municipality, public utility is implied (Article 10). For other cases, it requires a law or an agreement of the Consejo de Ministros.

2. Need for occupation. Once public utility is declared, the administration resolves on the concrete need to occupy specific properties (Article 15). A public information period of 15 days follows (Article 18), during which anyone can submit observations. The administration then resolves within 20 days (Article 20). Affected owners can file a recurso de alzada within 10 days, which has suspensive effect and must be resolved within 20 days (Article 22).

3. Justiprecio determination. Once the need for occupation is final, the price is determined through three successive routes (Articles 24 to 34). First, mutual agreement within 15 days. Second, if no agreement, the owner submits a valuation sheet (hoja de aprecio) within 20 days (Article 29), the administration responds within 20 days (Article 30), and the owner has 10 days to accept or reject. Third, if still disputed, the file passes to the Jurado Provincial de Expropiacion.

4. Payment and occupation. Once the justiprecio is set, payment must be made within six months (Article 48). Only after payment or consignment can the administration take physical possession (Article 51). If payment is delayed beyond six months, interest accrues at the legal rate on the justiprecio (Article 56). If four years pass without payment, the valuation must be redone (Article 58).

How is the justiprecio or fair price calculated?

The valuation method depends on the type of property. For land and buildings (bienes inmuebles), Article 43.2.a of the 1954 law states that the valuation follows exclusively the system set out in the Ley de Suelo (now RDLeg 7/2015, the texto refundido de la Ley de Suelo y Rehabilitacion Urbana). The old valuation rules in Articles 38 and 39 of the 1954 law were derogated by the Ley 8/2007.

Two principles govern the valuation date and exclusions. Article 36.1 fixes the value at the time the justiprecio file opens, explicitly excluding any plusvalias (value increases) that are a direct consequence of the project causing the expropriation or that are foreseeable for the future. Article 36.2 adds that improvements made after the file opens are not indemnifiable unless they were essential for conservation. This prevents an owner from inflating the price by upgrading the property once the expropriation is announced.

For urbanised land, the administration typically uses the metodo residual, regulated in RDLeg 7/2015 and developed in the Reglamento de Valoraciones (RD 1492/2011). In simplified terms: the value of the land equals the sale value of the finished building minus the valor de construccion (Vc), minus the promoter’s profit, minus necessary expenses. The Vc captures the cost of physically building the structure: execution costs, general expenses, industrial profit, construction taxes and professional fees. The coeficiente K, defined in Article 22.2 of RD 1492/2011, captures everything else: financing, management, promotion costs and the promoter’s business profit.

For movable goods, shares and concessions, the 1954 law retains its own criteria: for shares, the arithmetic mean of the stock exchange quotation, the capitalisation of average profits over three years at the legal interest rate, and the theoretical value from the last approved balance sheet (Article 40).

What did STS 256/2026 change about the valor de construccion?

The Supreme Court’s Sentencia 256/2026 of 4 March 2026 (Sala de lo Contencioso-Administrativo, Seccion Quinta, ponente Olea Godoy, rec. 1005/2024, ECLI:ES:TS:2026:1083) is the most significant 2026 ruling on justiprecio valuation. It consolidates the doctrine first set in STS 363/2022 of 23 March 2022 (rec. 2136/2021) and was reiterated weeks later in STS 652/2026 of 27 May 2026.

The core holding: there is no concurrence of concepts between the costs that go into the coeficiente K and the costs that go into the valor de construccion (Vc). They serve different valuation purposes. The costs that belong in the coeficiente K, because they respond to the promoter’s business activity rather than the construction process itself, are:

Cost excluded from Vc	Nature	Reason for exclusion
Notarial costs	Formalisation cost	Not a construction cost, but a cost of transmitting the finished product
Registry costs	Inscription cost	Derives from commercialisation, not from the building work
AJD (Impuesto de Actos Juridicos Documentados)	Transfer tax	Taxes the public deed, not the construction process
Seguro decenal (LOE)	Developer guarantee	Obligation of the promoter towards buyers, not a technical cost
Other promotion costs	Marketing, management	Part of the business margin, already retributed by the promoter’s profit

The practical consequence is direct. If the Vc is inflated with these promotion costs, the value of the land falls when the Vc is subtracted in the metodo residual, and so does the justiprecio. The Supreme Court rejected this practice because it double-counts costs that the coeficiente K already captures as the promoter’s overhead. For expropriated owners, the ruling pushes the justiprecio upward: in land valued by the metodo residual with an inflated Vc, the correction can mean tens of thousands of euros more in compensation.

The case in STS 256/2026 involved an expropriacion rogada (owner-initiated expropriation under Article 36 of the 1954 law) in Vila-Real, Castellón, where the Jurado Provincial de Expropiacion had set the cost increment at 29 per cent. The TSJ of the Comunidad Valenciana had raised it to 38.5 per cent, and the Supreme Court confirmed that the correct approach separates the Vc from the coeficiente K, as the 2022 doctrine requires. The doctrine applies to both expropiacion rogada and ordinary expropriation: any valuation of urbanised land using the metodo residual is affected.

If your expropriation is at the valuation stage, the first step is to examine the hoja de aprecio and the Jurado’s pericial report. Locate the section where the Vc is broken down and check whether notarial, registry, AJD, seguro decenal or other promotion costs appear. If they do, there is a technical and legal basis to challenge the valuation under the STS 256/2026 doctrine. The recurso contencioso-administrativo against the Jurado’s agreement has a two month deadline from notification (Article 46 of the Ley 29/1998, LJCA).

What is the Jurado Provincial de Expropiacion?

The Jurado Provincial de Expropiacion is the valuation tribunal that fixes the justiprecio when the owner and the administration cannot agree. Article 32 establishes it in each provincial capital, chaired by a magistrate designated by the president of the Audiencia, with four voting members: an Abogado del Estado from the provincial treasury delegation, two technical officials designated by the treasury, a representative of the relevant professional or business chamber (agricultural for rural property, urban property chamber for urban property), and a notary designated by the dean of the notarial college.

The Jurado decides the justiprecio by majority vote (Article 33), and its resolution must be reasoned, explaining the valuation criteria applied (Article 35.1). The Jurado’s decision exhausts the administrative route: the only further recourse is the recurso contencioso-administrativo before the administrative courts (Article 35.2). This makes the Jurado a hybrid body, combining judicial and expert functions, designed to provide an objective valuation that neither party controls.

What premium and interest are you owed on top of the price?

Two additional sums accrue beyond the justiprecio itself. Article 47 of the 1954 law grants a 5 per cent premium (premio de afeccion) in all expropriation cases, payable to the expropriated owner on top of the justiprecio. This compensates for the disturbance and forced nature of the transfer.

If the justiprecio is not determined within six months of the legal opening of the expropriation file, Article 56 obliges the administration at fault to pay interest at the legal rate on the justiprecio, backdated to the moment the price is finally set. Separately, Article 57 provides that the justiprecio earns legal interest from the date six months after payment was due (under Article 48) until actual payment. For 2026, the legal interest rate (interes legal del dinero) is 3.25 per cent per annum, fixed by the Ley de Presupuestos Generales del Estado and confirmed by the Banco de España. The demora rate for tax purposes, which applies in certain expropriation delay scenarios, is 4.0625 per cent (the legal rate plus 25 per cent). These provisions ensure that administrative delay does not erode the real value of the compensation.

What is the urgency procedure and when can it be used?

Article 52 provides an exceptional fast track that allows physical occupation before the justiprecio is finally determined. The Consejo de Ministros must declare the occupation urgent, and the file must include a credit reservation for the estimated justiprecio. This is not a routine shortcut: it is reserved for genuinely urgent public works.

The procedure works as follows. The affected owners are notified at least eight days in advance of the date and time for drawing up the acta previa a la ocupacion (pre-occupation record). On that date, the administration’s representative, accompanied by a technical expert and the mayor or a delegated councillor, meets the owners on site to record the property’s condition, crops, tenants and any other relevant details. The administration then sets a deposit, calculated by capitalising the taxable income of the property at the legal interest rate, increased by 20 per cent for amillarada properties. Once the deposit is paid and any perjuicio (damage from rapid occupation) indemnity is consigned, the administration can occupy within 15 days (Article 52.6). The justiprecio is then determined through the normal process afterwards.

For the owner, this means you can lose physical possession before the price is agreed, but you receive a deposit and the final price is still determined through the standard cascade. The urgency route is most commonly seen in major infrastructure corridors where years of negotiation would stall the project.

What is the reversion right and how does it work?

The reversion (reversion) right is the most important owner protection beyond the price itself. Article 54.1 provides that if the public work is not executed, if the service is not established, if there is surplus land, or if the property is declassified from its public purpose, the original owner or their heirs can reclaim the property by paying back the indemnity received.

The conditions are strict. There is no reversion if the property is simultaneously reassigned to another public utility purpose, provided the administration publicises the substitution and the owner can challenge it (Article 54.2.a). There is also no reversion if the property remains in public use for 10 years after the work is completed (Article 54.2.b).

The time limits for exercising the right are tight. If the administration notifies the owner of the excess, declassification or abandonment, the owner has three months to claim reversion (Article 54.3). Without such notification, the owner can exercise the right within 20 years of taking possession if the property was declassified or there was an excess (Article 54.3.a), within five years if the work was never started (Article 54.3.b), or within two years if the work was suspended for more than two years due to the administration’s fault (Article 54.3.c).

The reversion price is the original indemnity updated by the IPC (consumer price index) over the period from the justiprecio file opening to the exercise of the right (Article 55.1). If the property has undergone legal classification changes or improvements, or has suffered value loss, a new valuation is carried out at the date of the reversion claim (Article 55.2). The owner cannot take possession until the price is paid or consigned, and this must happen within three months of the administrative determination, or the reversion right lapses (Article 55.3).

How can you challenge the expropriation or the price?

You have two main routes of challenge. Against the declaration of need for occupation, you can file a recurso de alzada within 10 days of notification, which has suspensive effect and must be resolved within 20 days (Article 22). Against the Jurado’s justiprecio, you can file a recurso contencioso-administrativo before the administrative courts (Article 126).

For the price challenge, Article 126.2 imposes a threshold: the recurso can be based on lesion only if the amount fixed as justiprecio is lower or higher by more than one sixth (approximately 16.7 per cent) of the amount the claimant alleged in the proceedings. This prevents trivial disputes from clogging the courts. The recurso can also be based on substantial procedural defects or violation of the law’s provisions, regardless of the price gap (Article 126.3). The STS 256/2026 doctrine on Vc and coeficiente K is a violation of the valuation rules (Article 22.2 RD 1492/2011), so it can be invoked regardless of the percentage gap.

Article 125 adds a protection against irregular expropriation: if the administration occupies the property without having completed the required stages (public utility declaration, need for occupation and prior payment or deposit), the owner can use the interdicts of retener and recobrar to defend or recover possession. This is the one case where the normal bar on interdicts against the administration is lifted.

What are partial and total expropriation and how do they differ?

A partial expropriation takes only part of a property, which can leave the owner with a remainder that is economically unviable. Article 23 addresses this directly: if the partial expropriation makes the remaining portion antieconomica (uneconomic) for the owner, the owner can request that the expropriation cover the entire property. The administration must decide within 10 days, and the decision is subject to recurso de alzada. If the administration refuses total expropriation, the justiprecio must include indemnification for the perjuicios (prejudice) caused by the partial taking (Article 46).

This provision is practically important for a villa or finca owner on the Costa del Sol. If a road widening takes a strip of land that severs the property from its access road or leaves a remnant too small to build on, the owner can demand that the administration take the whole property rather than be left with an unusable fragment. For a deeper treatment of boundary and access issues, the property boundary disputes guide covers the Civil Code rules that apply when an expropriation does not occur but a neighbour’s work affects your access.

The expropriation process at a glance

Stage	What happens	Key article	Typical deadline
Public utility declaration	Administration or law declares the purpose is of public utility	Art 9 to 14	Variable
Need for occupation	Public information period, then resolution on which properties are needed	Art 15 to 23	15 days public info, 20 days resolution
Justiprecio: mutual agreement	Owner and administration try to agree a price	Art 24	15 days
Justiprecio: valuation sheets	Owner and administration exchange hojas de aprecio	Art 29 to 30	20 days each side, 10 days owner response
Justiprecio: Jurado decision	Jurado Provincial de Expropiacion fixes the price	Art 31 to 35	8 days to resolve
Payment and occupation	Price paid, then administration takes possession	Art 48 to 51	6 months for payment
Reversion	Owner can reclaim if project abandoned or surplus land	Art 54 to 55	3 months if notified, otherwise up to 20 years

A worked example: partial expropriation for a road widening with a Vc challenge

Consider a villa owner in Marbella whose property is affected by a road corridor expansion. The administration declares the public utility (implied by the approved road plan), identifies the strip of land needed, and opens the justiprecio file. The owner submits a hoja de aprecio valuing the strip at EUR 120,000, arguing the severance reduces the whole property’s value. The administration offers EUR 85,000 based on the Ley de Suelo valuation rules, but its pericial report includes notarial costs, registry costs, AJD and seguro decenal inside the valor de construccion when applying the metodo residual. This inflates the Vc and artificially deflates the land value.

The matter goes to the Jurado Provincial, which sets a justiprecio of EUR 98,000. The owner’s lawyer identifies the Vc error, invokes the STS 256/2026 doctrine, and files a recurso contencioso-administrativo within the two month deadline. The court orders a new valuation excluding the promotion costs from the Vc, which raises the land value and produces a corrected justiprecio of approximately EUR 112,000.

The owner receives EUR 112,000 plus the 5 per cent premio de afeccion (EUR 5,600), totalling EUR 117,600. If payment takes seven months, legal interest at 3.25 per cent accrues from month six on the justiprecio. If the road project is suspended for more than two years, the owner can claim reversion under Article 54.3.c, returning the indemnity updated by the IPC to recover the land. The partial taking may also trigger Article 23 if the remainder becomes uneconomic, allowing the owner to demand total expropriation.

For owners facing a planning decision rather than expropriation, the planning licence appeal process operates under a similar administrative cascade. For urban plan changes that trigger expropriation, the Marbella PGOU and the property registration process determine how expropriated land is recorded and how reversion rights are noted against third party acquirers. The property valuation guide explains the tasacion framework that underpins the Ley de Suelo valuation rules the Jurado applies.