Property Guarantees and Warranties in Spain: LOE Liability Periods, Seguro Decenal and Developer Obligations (2026)

Property Guarantees and Warranties in Spain: LOE Liability Periods, Seguro Decenal and Developer Obligations (2026)

Every new-build in Spain carries three statutory warranties that most buyers never read until something goes wrong. The Ley 38/1999 de Ordenacion de la Edificacion (the LOE) forces the developer to insure the building against construction defects for one year, three years and ten years, each covering a different class of fault, each backed by a minimum insured capital, and each enforceable against the insurer directly. The notary cannot sign the deed of a new residential building without proof that the insurance is in place. Since 1 January 2016, Ley 20/2015 has also modernised both the warranty instruments (adding the garantia financiera) and the advance-payment protection that was formerly governed by the now-derogated Ley 57/1968. This guide sets out what each warranty covers, what it costs the developer, how the enforcement works at the notary, and how the LOE framework now integrates the off-plan payment guarantee that protects your money during construction.

What are the three warranty periods under the LOE?

The LOE (Ley 38/1999, Article 17) sets three liability windows that run from the formal handover (recepcion), the date the developer and buyer sign the acta under Article 6. Each covers a distinct class of defect, and the distinction matters because a cracked tile and a cracked foundation follow completely different timelines.

Period	What it covers	Who is liable	Minimum insured capital (Article 19)
1 year	Defects in finishing and appearance (elementos de terminacion o acabado): paintwork, tiling, doors, fittings, surface cracks	The contractor (constructor) directly	5 per cent of the construction cost
3 years	Defects in construction elements or installations that breach habitability: waterproofing, plumbing, wiring, insulation, ventilation, noise protection	All building agents, individually by default; solidarily when the cause cannot be individualised; the developer always solidarily	30 per cent of the construction cost
10 years	Structural defects in foundation, supports, beams, floor slabs, load-bearing walls that compromise mechanical resistance and stability	All building agents, individually by default; solidarily when the cause cannot be individualised; the developer always solidarily	100 per cent of the construction cost

The developer (promotor) responds solidariamente, jointly and severally, with every other agent in the building process. This is the single most important protection for the buyer: you pursue the developer for any defect, regardless of which subcontractor, architect or engineer caused it. The developer then recovers internally from the responsible party. You never chase a subcontractor directly. The snagging guide covers the handover inspection that documents defects before the liability clocks start; this page covers the insurance structure that backs those clocks with real money.

What is the seguro decenal and who must buy it?

The seguro decenal (ten-year insurance) is the mandatory structural policy that Article 19.1.c of the LOE requires every residential developer to purchase before the notary will authorise the deed. It covers material damage to the building’s structural elements (foundation, supports, beams, floor slabs, load-bearing walls) caused by defects that compromise mechanical resistance and stability, for ten years from formal handover. The minimum insured capital is 100 per cent of the construction cost plus professional fees. Once the policy takes effect, it is irrevocable: neither the developer nor the insurer can cancel it by mutual agreement before the ten-year term ends (Article 19.4).

Ley 20/2015 (disposicion final 3.1, in force from 1 January 2016) amended Article 19.1.c to add a third instrument alongside the traditional seguro de danos materiales (damage insurance) and seguro de caucion (surety bond): a garantia financiera (financial guarantee) from an authorised entity. This gave developers more flexibility in how they satisfy the structural warranty requirement, but the substantive protection for the buyer is unchanged: the minimum capital, the irrevocability and the insurer’s obligation to pay or repair remain identical regardless of which instrument the developer chooses.

The policyholder (tomador del seguro) is the promotor for the three-year and ten-year guarantees, and the constructor for the one-year finishing guarantee, though the developer can agree with the constructor that the constructor will hold the one-year policy on the developer’s account (Article 19.2). The insured parties are the developer and every subsequent buyer of the building or any part of it. This means the seguro decenal follows the property, not the original buyer. If you buy a three-year-old apartment from the first owner, the remaining seven years of structural cover transfer to you automatically.

The premium must be paid at the moment of handover. If it is split into instalments, a missed instalment does not let the insurer cancel the policy, suspend cover or refuse a claim (Article 19.2). This is a deliberate consumer protection: the insurer cannot use a payment dispute between itself and the developer to escape liability toward the buyer.

How much insurance cover does the LOE require?

Article 19 sets minimum insured capital as a percentage of the final construction cost (coste de ejecucion material) plus professional fees. The three guarantees carry different floors, reflecting the escalating severity of the damage they cover.

Guarantee	Minimum capital	Can the developer retain cash instead?	Franchise allowed?
1-year finishing	5 per cent	Yes, the promotor may retain 5 per cent of the build cost in lieu of insurance	No franchise or limitation permitted
3-year habitability	30 per cent	No, must be insured or backed by a garantia financiera	Maximum 1 per cent of the insured capital per registered unit
10-year structural (seguro decenal)	100 per cent	No, must be insured or backed by a garantia financiera	Maximum 1 per cent of the insured capital per registered unit

The one-year guarantee is the only one the developer can satisfy by simply retaining 5 per cent of the construction cost rather than buying an insurance policy (Article 19.1.a). The three-year and ten-year guarantees must be backed by a seguro de danos materiales (damage insurance), a seguro de caucion (surety bond) or, since Ley 20/2015, a garantia financiera (financial guarantee) from an authorised insurer. There is no cash-retention escape valve for the structural cover. This is the point of the seguro decenal: a developer cannot self-insure a foundation failure.

The insurer can settle a claim either by paying cash compensation (indemnizacion en metalico) based on the assessed damage, or by repairing the defect directly (Article 19.6). For a surety bond (seguro de caucion), the insurer must indemnify the insured on first demand and cannot raise defences it might have against the developer (Article 19.3).

How does the LOE enforce the warranty at the notary?

Article 20 of the LOE is the enforcement mechanism that makes the seguro decenal unavoidable. It says, in two short paragraphs, that no notary may authorise the escritura publica of a declaracion de obra nueva (the public deed that registers a new building) without seeing and testifying to the constitution of the Article 19 guarantees, and that the Land Registry will not inscribe the deed without that proof.

In practice, the notary checks the insurance certificates before the signing appointment. If the developer cannot produce the seguro decenal policy and the one-year guarantee, the notary refuses to sign. The building cannot enter the Land Registry, the buyer cannot register title, and utilities companies will not connect permanent supplies. The same enforcement applies to the Registro Mercantil: the developer’s corporate registration cannot be closed or liquidated while the LOE warranty periods are open, unless the developer proves the guarantees are in place for every building it has promoted (Article 20.2).

This is why the off-plan buying mechanics guide and the common mistakes guide both tell buyers to demand the Libro del Edificio at handover, the document that contains the insurance policies, the construction details and the maintenance schedule. The insurance certificates inside it are not marketing material; they are the proof the notary needed to sign the deed. A buyer who accepts keys without reviewing the Libro del Edificio is accepting a property whose warranty proof they have never seen.

What replaced the Ley 57/1968 bank guarantee?

The Ley 57/1968, which governed the protection of advance payments to developers, was formally derogated by Ley 20/2015 (disposicion final 3.4) with effect from 1 January 2016. Its protections did not disappear: they were absorbed into the LOE itself, in the Disposicion adicional primera, which Ley 20/2015 substantially rewrote. The colloquial term aval Ley 57/1968 is still used by agents and buyers, but the legal basis is now the LOE, not the 1968 statute. Understanding the current framework matters because the amended provisions added several buyer protections that the old law lacked.

Feature	LOE Article 19 warranty	LOE Disposicion adicional primera (advance-payment guarantee)
What it protects	Construction defects after delivery	Advance payments during construction
When it applies	From formal handover (recepcion) for 1, 3 or 10 years	From licence of edificacion to the escritura
Who must hold it	The developer (promotor), before the notary signs	The developer, before accepting any advance payment
What the buyer recovers	Repair or cash compensation for the defect	Full advance plus the legal interest rate if the developer fails
Enforcement	Notary refuses the deed without it (Article 20)	Insurer or bank pays on demand; funds held in a separate cuenta especial

Under the amended Disposicion adicional primera, every developer who collects advance payments must hold a seguro de caucion (surety insurance) or an aval solidario (bank guarantee) from an authorised entity, covering the full amount plus the legal interest rate (interes legal del dinero, set at 3.25 per cent for 2026 by the Ley de Presupuestos Generales del Estado). The funds must be deposited in a separate cuenta especial at a credit entity, distinct from the developer’s own accounts, and the developer can only draw on them for construction-related expenses.

Three protections added by the Ley 20/2015 rewrite deserve attention. First, the insurer must pay the buyer within 30 days of a formal claim, and the buyer can claim directly against the insurer if the developer cannot be reached (Disposicion adicional primera, Dos.1.h). Second, after paying a claim, the insurer is subrogated to the buyer’s rights against the developer, and the developer cannot sell the property without reimbursing the insurer first (Disposicion adicional primera, Dos.1.j and 1.k). Third, non-compliance carries a sanction of up to 25 per cent of the amounts that should have been guaranteed (Disposicion adicional primera, Siete).

The guarantee is cancelled once the local authority issues the cedula de habitabilidad (habitability certificate) or licencia de primera ocupacion and the developer delivers the property to the buyer (Disposicion adicional primera, Cinco). The off-plan buying mechanics guide explains how to verify the guarantee is in place before signing the reservation contract. A buyer who holds an advance-payment guarantee but never checks the seguro decenal at handover is protected against developer insolvency but not against a defective foundation.

Who is exempt from the seguro decenal?

The Disposicion adicional segunda of the LOE, as amended by Ley 53/2002 (in force from 1 January 2003), carves out two exemptions from the mandatory seguro decenal.

The first is the autopromotor individual de una unica vivienda unifamiliar para uso propio: an individual who builds a single family home for their own personal use, not for sale, is not required to purchase the seguro decenal. This exemption has a catch. If the autopromotor sells the property within the ten-year structural window (Article 17.1.a), they must procure the seguro decenal for the remaining period, and the notary will not authorise the sale deed without proof of the insurance. The only escape is if the buyer expressly waives the guarantee in writing, and the autopromotor must prove they actually used the property as their residence.

The second exemption covers rehabilitation of buildings whose original construction licence predates the LOE’s entry into force on 6 May 2000 (disposicion transitoria primera). Buildings permitted before that date are not subject to the LOE warranty regime, even if they are later rehabilitated.

Non-residential buildings whose primary destination is not housing (hotels, offices, commercial premises) are also outside the seguro decenal requirement, though the government may extend the guarantee obligation to other uses by Royal Decree (Disposicion adicional segunda, Dos). The practical point for a buyer of a Spanish new-build apartment or villa: if the developer claims an exemption, ask for the legal basis in writing. The autopromotor exemption does not apply to a developer selling to third parties, only to an individual building for themselves.

How does a buyer claim under the LOE warranties?

The claim path runs through the developer first, then the insurer. The buyer documents the defect with photographs and a written notice (notificacion) to the developer within the relevant warranty window. If the developer does not respond within a reasonable period, typically 30 days, the buyer’s lawyer files a formal reclamacion against the insurer that issued the Article 19 policy.

The prescription deadline is two years from the date the damage appears, not from the handover date (Article 18). This is a critical distinction: a structural crack that surfaces in year seven of the ten-year window gives the buyer two years to file, but only if the crack is within the ten-year structural period that began at formal receipt. A habitability defect that appears in year two of the three-year window gives the same two years. The clock starts when the damage becomes apparent, not when the keys changed hands.

The LOE liability runs alongside the buyer’s separate rights against the seller for hidden defects (vicios ocultos) under articles 1484 and following of the Spanish Civil Code, a parallel track that the snagging guide covers in detail. The Civil Code route applies to defects not visible at handover and has its own deadlines. A buyer who suspects a hidden defect should consult an independent lawyer promptly; waiting weakens the causal link between the defect and the construction.

What do the LOE warranties not cover?

Article 19.9 sets out the standard exclusions, applicable unless the policy agrees otherwise. The LOE insurance covers material damage to the building from construction defects, and nothing beyond that scope.

Exclusion	What it means in practice
Bodily injury or other economic loss	The insurance pays for the cracked wall, not for the injury the crack caused or the lost rental income
Damage to adjacent properties	A foundation failure that cracks the neighbour’s wall is not covered
Damage to movable goods	Furniture and personal belongings inside the building are excluded
Post-handover modifications	Damage from works the buyer or a later owner carried out after receipt is excluded, unless the works fix a defect listed in the handover acta
Misuse or poor maintenance	The LOE is not a substitute for the maintenance schedule in the Libro del Edificio
Fire or explosion	Unless the fire or explosion was caused by a defect in the building’s own installations
Force majeure, third-party acts, self-inflicted damage	Standard insurance exclusions
Parts with reservations in the acta	Damage to items listed as reservations in the handover acta is not covered until the items are fixed and confirmed in a new signed acta

The exclusions explain why the building and renovation cost guide and the common mistakes guide both stress the handover acta. Every defect you accept without listing it as a reservation is a defect the insurer can later argue was your own use, not a build fault. The acta is the document that fixes the boundary between the developer’s liability and yours.

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.