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This article forms part of the CostaLuz Lawyers blog and is published for general informational and educational purposes only. It was prepared with the assistance of artificial intelligence tools and, before publication, was substantively reviewed and editorially approved by Maria de Castro, a Spanish-qualified lawyer registered with the Cádiz Bar Association under number 2745, founder of CostaLuz Lawyers and the person responsible for the editorial review of the published content.
This article does not constitute legal, tax, immigration, employment, estate-planning or investment advice and does not replace an individual assessment and the professional work of the appropriate CostaLuz Lawyers specialist. No action or omission should be based solely on this information.
Cracks appearing after next door starts building work is a real and recurring problem for Spanish property owners — and it is legally distinct from a simple boundary disagreement.
Not the same claim as a boundary dispute
A boundary dispute is about exactly where the legal property line runs. This is different: it concerns physical damage or disruption — cracking, subsidence, water ingress, or structural movement — caused by construction activity on a neighbouring property, and it is pursued as a separate type of claim.
The legal basis for a claim
Under Spanish civil liability principles, whoever carries out or commissions building works can be held responsible for damage caused to a neighbouring property, even where there was never a direct contract between the two property owners.
Who can actually be liable
Depending on the circumstances, liability can fall on the neighbouring owner who commissioned the works, the construction company that carried them out, or both — the specific facts of how the damage occurred determine who is actually responsible.
What to do as soon as damage appears
Document the damage immediately with photos and dated notes, arrange an independent technical report establishing the cause and extent, and notify both the neighbour and, where relevant, their insurer in writing. Many disputes of this kind are ultimately resolved through direct negotiation once the cause and cost are clearly established — with a formal claim available if that does not lead to a fair outcome.
Call us today on +34 919 499 342 or email marialuisa@costaluzlawyers.es if a neighbour’s building works have damaged your Spanish property.
Damage from a neighbour is not always caused by works. Where it arrives as water rather than as cracking, the liability rules are their own. who is liable for a leak from the flat above
Frequently Asked Questions
Is this the same as a boundary dispute with my neighbour?
No. A boundary dispute is about where the property line actually sits; this is about damage or disruption caused by construction work — cracks, subsidence, water ingress, or structural movement — which is a separate legal claim even though both involve a neighbouring property.
What is the legal basis for a claim over construction damage?
Spanish civil liability law holds whoever carries out or commissions building works responsible for damage caused to a neighbouring property, even without a prior contract between the two owners.
Who can I claim against — the neighbour, or their builder?
Potentially both. The property owner who commissioned the works and the construction company carrying them out can each carry liability, depending on how the damage occurred and who was actually negligent.
What should I do as soon as I notice damage?
Document everything immediately with photos and dated notes, get an independent technical report on the cause and extent of the damage, and notify the neighbour and their insurer in writing before the situation develops further.
Do I need to go to court, or can this be resolved directly?
Many cases resolve through direct negotiation once liability and repair costs are clearly documented, particularly where the neighbour’s insurance is involved — but a formal claim remains available if a fair resolution cannot be reached.
Property management problems are not limited to construction disputes — see our guide to what to do if your property manager is mishandling rent.