Key data
| Regulation | Resolution of June 17, 2026, from the General Directorate of Legal Security and Public Faith |
|---|---|
| Publication | October 22, 2026 |
| Entry into force | Not specified |
| Affected parties | Buyers and sellers of real estate in coastal zones; notaries and property registrars |
| Category | Real Estate |
| Affected registered property | Registered property 12,584, Property Registry of La Unión no. 2 (Murcia) |
| Approved boundary delimitation | Ministerial Order of 1999 |
| Certifying body | Coastal Demarcation of Murcia |
| Applied regulation | Art. 36.3 of the General Coastal Regulation |
Buying an apartment on the first line of coast can end in an operation with no possible registry registration. That is exactly what has happened in La Unión (Murcia): the buyers of registered property 12,584 signed a deed of sale before a notary, but the registrar of the Property Registry of La Unión no. 2 denied registration because the Coastal Demarcation of Murcia certified that said property invades the maritime-terrestrial public domain.
The Resolution of June 17, 2026 from the General Directorate of Legal Security and Public Faith confirms the denial and dismisses the appeal filed by the buyers, who argued insufficient motivation and deficient identification of the certification, distinguishing between their specific apartment and the development as a whole.
What does this regulation establish?
Article 36.3 of the General Coastal Regulation is categorical: when the certification from the Coastal Demarcation proves that a property invades the maritime-terrestrial public domain, the registrar is obligated to deny registration. It is not a discretionary power, it is a legal obligation.
The key elements of the case are as follows:
- Affected property: Registered property 12,584, registered in the Property Registry of La Unión no. 2 (Murcia).
- Boundary delimitation in force: Approved by Ministerial Order in 1999, which delimits the maritime-terrestrial public domain in that area.
- Determining certification: Issued by the Coastal Demarcation of Murcia, certifying the invasion of the property into the public domain.
- Argument of the buyers: They argued that the certification did not sufficiently individualize their apartment with respect to the development as a whole.
- Resolution of the DGSJFP: Dismisses the appeal and confirms the registry denial.
The most relevant legal point for any buyer is that article 34 of the Mortgage Law —which protects the third party in good faith who registers in the Registry— does not apply to public domain assets. The public domain is inalienable and imprescriptible: no private transfer can be consolidated over it, even if the seller appears as owner in the Registry.
Economic and operational impact
The economic consequences of acquiring a property in a maritime-terrestrial public domain zone are serious and difficult to reverse:
- Impossibility of registry registration: The buyer cannot prove their ownership against third parties or obtain mortgage financing on the property.
- Loss of registry protection: Without registration, the buyer is unprotected against seizures, liens or subsequent transfers by the seller.
- Risk of nullity of the transaction: A sale of public domain property can be declared null, with the consequent obligation of restitution and possible litigation over the return of the price paid.
- Irrecoverable legal and notarial costs: The costs of deed execution, notary, transfer taxes and fees already paid are not automatically recovered.
- Impossibility of resale or mortgage: The property remains in a legal limbo that blocks any future transaction.
This case shows that the mere existence of a notarial deed and a previous registered property does not guarantee the transferability of the asset if there is a coastal boundary delimitation that affects it.
Who does it affect?
- Buyers of real estate in coastal zones: Especially in developments near the sea in any Spanish coastal municipality.
- Sellers and real estate developers: Who market homes or premises in areas potentially affected by coastal boundary delimitations.
- Notaries: Who authorize deeds of sale in coastal zones without previously verifying the Coastal certification.
- Property registrars: Obligated by art. 36.3 of the General Coastal Regulation to deny registrations when there is certification of invasion of the public domain.
- Financial entities: That grant mortgages on properties in coastal zones without checking the boundary delimitation in force.
- Real estate investors: Who acquire portfolios of assets on the first or second line of coast without specific coastal due diligence.
Practical example
A married couple signs in 2026 a deed of sale of an apartment in a coastal development in La Unión (Murcia) at market price. They pay the Property Transfer Tax, notary fees and request registration in the Property Registry of La Unión no. 2.
The registrar requests, as is mandatory, certification from the Coastal Demarcation of Murcia. This certifies that registered property 12,584 —which corresponds to the purchased apartment— invades the maritime-terrestrial public domain according to the boundary delimitation approved by Ministerial Order in 1999.
The registrar denies registration under art. 36.3 of the General Coastal Regulation. The buyers appeal arguing that the certification does not distinguish their specific apartment from the development as a whole. The General Directorate of Legal Security and Public Faith dismisses the appeal: the certification is sufficient and the denial is correct.
Result: the couple has paid the price of the apartment, taxes and deed execution costs, but cannot register the property in their name or obtain Registry protection. The only way is to go to court to claim the resolution of the contract and the return of the price from the seller.
What should companies do now?
- Request Coastal certification before signing: Before any property sale in a coastal zone, request certification from the corresponding Coastal Demarcation that proves whether or not the property affects the maritime-terrestrial public domain. This step is prior to the deed, not after.
- Review the boundary delimitation in force in the municipality: Check with the Ministry for Ecological Transition if there is an approved boundary delimitation that affects the area of interest, especially in coastal municipalities of Murcia, Valencia, Andalusia, Catalonia and the Canary Islands.
- Include suspensive condition in the contract: If it is not possible to obtain certification before signing, include in the earnest money contract or in the deed a suspensive condition that makes the effectiveness of the transaction dependent on registry registration.
- Do not rely on previous registry history: The fact that the property is registered in the Registry in the seller's name does not guarantee its transferability. The public domain is not disaffected by the mere fact of appearing in the Registry.
- Specific due diligence for coastal portfolios: Investors who acquire real estate assets in coastal zones should incorporate verification of the coastal boundary delimitation as a mandatory step in their due diligence process, at the same level as verification of liens and encumbrances.
- Specialized legal advice: In case of any doubt about the situation of a property with respect to the maritime-terrestrial public domain, consult with a lawyer specializing in real estate law and coastal law before committing funds.
Frequently asked questions
What happens if I buy an apartment that invades the maritime-terrestrial public domain?
The registrar is obligated to deny registration, as established by art. 36.3 of the General Coastal Regulation. Without registration, the buyer does not obtain Registry protection or can prove their ownership against third parties. The only way to recover the price paid is through judicial action to resolve the contract against the seller.
Does article 34 of the Mortgage Law protect the good faith buyer in coastal zones?
No. Article 34 LH, which protects the good faith mortgage holder, does not apply to public domain assets. The maritime-terrestrial public domain is inalienable and imprescriptible, so no private transfer can be consolidated over it, even if the seller appears as owner in the Registry.
How do I know if a property is affected by the coastal boundary delimitation before buying?
By requesting certification from the Coastal Demarcation of the corresponding province (in this case, Coastal Demarcation of Murcia). You can also check the approved boundary delimitation with the Ministry for Ecological Transition. In the case of La Unión (Murcia), the boundary delimitation in force was approved by Ministerial Order in 1999.
Can the registrar register the property if the buyer argues that the certification is not sufficiently individualized?
No, according to the Resolution of June 17, 2026 from the General Directorate of Legal Security and Public Faith. The buyers of property 12,584 argued precisely that the certification did not distinguish their specific apartment from the development as a whole, but the DGSJFP dismissed the argument and confirmed the denial.
What regulation obliges the registrar to deny registration in these cases?
Article 36.3 of the General Coastal Regulation obliges the registrar to deny registration when the certification from the Coastal Demarcation proves that the property invades the maritime-terrestrial public domain. It is not a discretionary power: it is a legal obligation that admits no exceptions based on the buyer's good faith.
Official source
Consult complete regulation in official source
Notice: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://www.boe.es/diario_boe/txt.php?id=BOE-A-2026-22019
