Constructor's Liability Insurance in Spain

Third-party liability and works damage cover for builders, developers, contractors and self-builders in Spain.

By Andrew Turner · In insurance since 2001, exclusive Generali agent since 2007 · DGS Registry C0467B54657010 · Last reviewed May 2026

Quick Answer. Constructor's Liability Insurance in Spain

Decenal mandatory?Yes — new builds (Ley 38/1999, LOE)

Typical premium€1,500–€8,000+ per project

Cover term10 years from final certificate

RC obrasAdd-on for site liability

Self-builders (autopromotor)Decenal still required

Spanish Insurance Law: Constructor's Liability & Decennial. Key Facts, Limits & Exclusions

The legal framework, specific waiting periods, exclusions and citations every prospective policyholder should know. Sources are linked inline to the BOE (Boletín Oficial del Estado) and Spanish regulators.

Legal framework

Decennial structural insurance (Seguro Decenal) is mandatory for new residential construction under Ley 38/1999 de Ordenación de la Edificación (LOE). The cover is a 10-year structural warranty running from the date of acta de recepción (final acceptance certificate). Without it, the building cannot be registered in the Property Registry and the title deed (escritura pública de obra nueva) cannot be executed.

The three-tier LOE warranty system

Article 17 of the LOE establishes three tiers of mandatory builder warranty: 1 year for finishes and minor works defects (paint, tiles, doors); 3 years for habitability defects (insulation, ventilation, water-tightness from non-structural causes); and 10 years for structural defects affecting load-bearing elements (foundations, columns, beams, slabs, walls). Only the 10-year structural cover requires insurance under the LOE — the shorter warranties are direct-builder obligations, but RC obras insurance (see below) covers them in practice.

Self-builders (autopromotor)

Article 19.1 LOE makes Decenal mandatory not just for property developers but also for autopromotores — individuals building or commissioning a single home for their own use. There is one limited exception for self-build of one's own home with subsequent sale, but this is narrowly construed.

Self-builders typically pay €2,500–€4,000 for a single dwelling versus €8,000+ for developers building multiple units. The Organismo de Control Técnico (OCT) inspection — required by all decenal insurers — adds €1,500–€3,000 to the project but identifies issues during construction rather than after.

Related cover: RC obras and RC promotor

RC obras (Responsabilidad Civil de Obra) is site-liability insurance covering third-party claims during construction (passers-by injured, neighbours' property damaged) — mandatory in many municipalities as a condition of building licence. RC promotor is the developer's civil liability for the 1- and 3-year warranties under the LOE that aren't covered by Decenal. Many municipalities also require an aval bancario or seguro de afianzamiento for off-plan sales — see our bond and aval insurance page.

Standard exclusions

Decenal covers structural defects from vicios o defectos that affect resistance, stability or mechanical strength. It excludes: aesthetic damage (cracks not affecting structure); defects from work carried out by subsequent owners;

damage from extraordinary natural events (covered by the Consorcio); damage from owner negligence (failure to maintain); and any damage where the OCT was prevented from inspecting during construction. Always retain the OCT certificate — it is required by buyers' lawyers when the property is sold.

Constructor's Liability Insurance in Spain

Constructor's liability insurance Spain (Seguro de Responsabilidad Civil de Constructor) is essential for anyone carrying out building work in Spain. Under the Ley de Ordenación de la Edificación (LOE), all parties in construction carry liability for up to 10 years after completion for structural defects.

Who Needs Constructor's Liability?

Building contractors and main contractors (constructores)
Subcontractors and specialist trade contractors
Property developers (promotores) — required by Spanish law
Self-builders (autopromotor) carrying out their own construction
Architects and technical architects (aparejadores)
Renovation contractors — kitchens, bathrooms, extensions, pools

What Constructor's Liability Insurance Covers

Third-party bodily injury during construction operations
Third-party property damage caused during construction works
Damage to neighbouring properties — vibration, subsidence, collapse
Damage to underground services — pipes, cables, drains
Temporary structures — scaffolding, hoarding, site cabins
Legal defence costs for covered liability claims
Pollution liability arising from construction operations

All Risk Works Cover (Todo Riesgo de Construcción)

We can also arrange All Risk cover for the works themselves — protecting the building under construction against fire, storm, flood, collapse, theft of materials and malicious damage. Often required by the bank financing the construction.

Optional Extras

Decennial liability (Seguro Decenal): Mandatory for new residential builds in Spain under LOE — 10-year structural defect cover
Professional indemnity extension: Errors in design by architect or engineer
Delayed completion / loss of rent: Financial loss if construction is delayed by an insured event
Environmental liability: Pollution clean-up costs arising from works
Latent defect insurance: Cover for hidden defects that emerge after practical completion

Spanish legal requirement: Property developers (promotores) are legally required to hold Decennial Insurance (Seguro Decenal) for new residential buildings under the LOE.

How to Get a Quote

We make getting a quote simple and fast.

Call or email us — ring 966 461 625 or email info@turnerinsurance.es. Our English-speaking team is available Monday to Friday, 09:30–15:00.
Tell us your situation — we will ask a few quick questions about what you need to cover, your age, location, and any existing policies you hold.
We compare options — as authorised Generali agents, we present the plans that match your needs and budget. No pressure, no obligation.
Your policy is set up — once you are happy, we arrange everything and send your certificate and English-language policy documents promptly.

Constructor Liability Insurance Products

Cover level	What is included	Best for
Seguro Decenal (10-Year)	Structural defect liability for 10 years — mandatory for promotors under the LOE	Property developers and promotors
RC Constructor / Obras	Builder civil liability during construction — third-party injury and damage	Building contractors and self-builders
RC Promotor	Developer liability from design to handover — covers architects and project managers	Promotors managing the full build
Todo Riesgo Construcción	All-risks cover for materials, plant and works-in-progress during the build	Major construction projects and new builds

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Approximate Constructor & Builder Insurance Pricing

Annual liability premiums for trades and developers, plus one-off Decenal premiums:

Small trade (sole tradesman)

from €600/yr

RC up to €600,000
Tools & equipment cover
Spain coverage
Defensa Jurídica
Seguro Decenal pricing on application

Frequently Asked Questions. Constructor & Builder Liability Insurance

These are the most common questions we receive.

Spanish construction has multiple layers of compulsory insurance under the Ley de Ordenación de la Edificación (LOE). Builders, developers and self-builders need to understand each. Here are the questions we are asked most often.

Seguro Decenal is a 10-year structural warranty insurance required by Spanish law (LOE, Ley 38/1999) for all new residential buildings. It covers structural defects affecting the stability and habitability of the building for 10 years from completion. It is mandatory before the building licence (licencia de primera ocupación) is issued. Self-builders (autopromotor) building their own home are also subject — though some self-build exemptions exist.

Premium is typically 0.4-1.2% of total construction value, paid as a single premium at building completion (when the OCT. Organismo de Control Técnico — has approved the structure). For a €300,000 villa build, expect €1,500-€3,500 Decenal premium. The OCT inspection itself is a separate cost (€2,000-€5,000) but is essential and required by Spanish law.

RC Obras is liability cover for the works in progress — covers third-party damage caused during construction (worker injury to neighbours, dust damage to adjacent buildings, accidental damage from machinery). It runs throughout the build period and finishes when the project completes. RC Obras is part of standard contractor liability cover, not Decenal which is post-completion.

Required by most municipality building permits before licencia de obras is granted. The town hall checks for valid RC during the construction period. Premium is typically 1-3% of construction value, depending on the build type and risk. Larger and more complex projects (high-rise, industrial) attract higher rates.

RC Promotor (developer civil liability) covers a property developer's exposure as the legal client of construction works. Different from RC Obras (which covers the contractor doing the building). RC Promotor includes pre-sale customer claims, defects emerging during/after construction, and contractual disputes with buyers. Standard for multi-unit developments and recommended for self-promoters of single villas.

Some main contractor RC includes vicarious liability for subcontractors, meaning if a subcontractor is sued and unable to pay, your insurance covers it. More commonly, subcontractors should hold their own RC liability — the main contractor's policy is the safety net only. We help contractors verify their subcontractors' insurance at hire stage.

OCT (Organismo de Control Técnico) is an independent technical control body that inspects the building during construction to validate structural compliance. The OCT report is required for Seguro Decenal issue. The OCT visits at key construction phases (foundations, structural completion, final). Without a satisfactory OCT report, no Decenal can be issued and no licencia de primera ocupación will be granted.

Personal-use homes that won't be sold are sometimes exempt — but Decenal is still required if the property might be sold within 10 years of completion. The exemption is challenged by recent Supreme Court rulings. Most legal advisors now recommend Decenal for all autopromotor builds for protection against future sale complications.

Tool theft from sites is a major issue for trades — often the largest claim category. Tool cover under contractor policies typically €1,500-€10,000 with conditions: locked van/site box, security at site, registered serial numbers for high-value items. Site-based machinery (excavators, generators, scaffolding) can be specifically covered with higher sums. We arrange specific tool/equipment cover for trades.

Yes. Spanish construction workers are covered by the Convenio General de la Construcción (the construction sector collective agreement) which requires accident-at-work cover from each employer. This is on top of standard Spanish social security accident scheme. Premium is typically €40-€100 per worker per year. Site safety plans (Plan de Seguridad y Salud) are also legally mandatory under construction law.

These are Spanish construction warranty laws setting three time bands for builder responsibility: Anual (1 year) for finishing defects, Trienal (3 years) for habitability defects, and Decenal (10 years) for structural defects. Decenal is the most expensive and only covers structural failure.

Yes, in some circumstances. Spanish construction law allows personal action against directors, project managers and OCT inspectors in cases of serious negligence or fraud. This is why directors of construction companies should hold Directors and Officers (D&O) liability cover alongside the company's RC. Run-off cover for past projects is also important when a construction company is wound up.

Decenal claims are typically handled by the insurer's specialist construction defect team — they investigate, instruct experts, and either settle or defend on your behalf. RC Obras claims are similarly handled. As the insured contractor or developer, you cooperate with the investigation but the insurer manages the legal process. We act as your interface throughout.

Yes — under Spanish law, claims must be notified within 7 days of the contractor or developer becoming aware of the issue. Late notification is a frequent reason for claim decline. The clock starts when the issue is reported to you, not when you decide whether to engage with it. Always notify and let the insurer assess, even for issues you think will resolve themselves.

Not for self-employment — if you want to work as a self-employed tradesperson in Spain you need Spanish qualifications. If you are seeking employment with an established firm, that is a different matter. Your UK qualifications may or may not transfer — check with the relevant Spanish trade association. Insurance requires you to be legally entitled to perform the work; cover for unauthorised installations may be void.

More questions? Visit our complete FAQ centre with 90+ detailed guides, or contact us for free English-speaking advice.

How This Compares to the Competition

Honest comparisons help you make an informed choice. These figures are typical Spanish-market starting points and depend on age, area, cover level and individual circumstances.

Generali Decenal vs Mapfre Decenal and Asefa

How Generali's 10-year structural warranty (Seguro Decenal under Ley 38/1999 LOE) compares to Mapfre and Asefa, the specialist.

Feature	Generali Decenal	Mapfre Decenal	Asefa Decenal
Mandatory under LOE	Yes — meets requirement	Yes — meets requirement	Yes — meets requirement
Cover period	10 years from final certificate	10 years from final certificate	10 years from final certificate
OCT (technical control)	Required — we coordinate	Required — we coordinate	Required — included
Self-builder (autopromotor) accepted	Yes — single dwelling	Yes — single dwelling	Yes — specialism
RC obras (site liability) bolt-on	Yes	Yes	Yes
RC promotor (developer) bolt-on	Yes	Yes	Yes
Premium €350k single-dwelling self-build	~€2,800/build	~€3,200/build	~€3,000/build

Comparisons are based on publicly available product literature and our experience placing policies across the Spanish market. Premium estimates assume a healthy applicant on the Costa Blanca with no significant claims history. Contact us for a personalised, like-for-like quote.

Sources & References

This page references the following official Spanish regulatory and legal sources. These are the authoritative bodies and laws governing insurance products in Spain:

Dirección General de Seguros y Fondos de Pensiones (DGS). Spanish insurance regulator. Confirms registration of insurance brokers (Andrew Turner: Registry C0467B54657010) and authorises all insurance products distributed in Spain.
Ley 50/1980. Ley de Contrato de Seguro (BOE). Spanish Insurance Contract Law. The primary legal framework governing all insurance contracts in Spain — defines duties, claims, cancellation rights and disclosure obligations.
Ley 38/1999, de 5 de noviembre, de Ordenación de la Edificación (BOE). Spanish Building Standards Law (LOE). Requires the 10-year structural warranty (Seguro Decenal) for all new residential construction.

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