The Ley de Costas is the Spanish law governing the coastal zone. It defines the public maritime-terrestrial domain (DPMT) — the strip of coast, sand, cliffs and inter-tidal area that is public property and cannot be privately owned — and establishes protection and easement zones inland where restrictions apply. Properties genuinely on the public domain can only be used under concessions granted by the state, are not truly owned, and can face expiry/removal issues. Properties in the protection zone (typically a strip inland from the DPMT) face restrictions on building and use. Beyond that, there's a transit easement for passage. For buyers: any coastal property needs a specific coastal-law check — where the shore boundary (deslinde) is, whether the property is on the DPMT, whether it holds a valid concession, and what zone restrictions apply. Getting this wrong can mean buying something that isn't legally yours or faces enforcement. We handle coastal-law due diligence.
What the Coastal Regime Is
Spain treats its coastline as a national asset to be protected in the public interest. The Ley de Costas (Coastal Law) sets out how the coastal zone is defined and regulated, aiming to preserve access, environmental value and public use of the shore. In practice, that translates into a layered system of public ownership of the immediate coast, protection zones inland where private ownership exists but with restrictions, and easements ensuring public passage and access.
The law has been amended over the decades, most significantly to attempt to reconcile long-standing private "ownership" claims with the public-domain principle. Coastal properties come in every shade — some fully private and unaffected, some in protection zones with limits, some on the DPMT held only under concession, and some caught up in unresolved historical claims. The single most important thing a coastal buyer can do is get the specific coastal-law status of the property checked before committing. We do that.
The Public Maritime-Terrestrial Domain
The public maritime-terrestrial domain (dominio público marítimo-terrestre, DPMT) is the core concept. It broadly includes:
- The shore/beach and the strip subject to tidal action.
- Cliffs, dunes and other natural coastal features.
- Land that has been formally demarcated (deslindado) as part of the DPMT by the state.
Property on the DPMT is public and cannot be privately owned. Any construction that predates the current regime and remains standing on the DPMT typically does so under a concession (a right of use for a limited period) granted by the state, not as private ownership. When the concession expires — and concessions are for defined periods — the property may need to be removed or the concession renewed subject to conditions. This is where nightmare scenarios about seafront properties losing status originate.
Protection & Easement Zones
Inland from the DPMT, the law establishes:
| Zone | Broadly |
|---|---|
| Protection zone (servidumbre de protección) | A strip inland from the DPMT boundary (typically 100 m, reducible in urban areas) where private property exists but with restrictions on new construction and use to protect the coast. |
| Transit easement (servidumbre de tránsito) | A narrower strip ensuring public passage along the shore. |
| Influence zone | A wider zone where certain planning considerations apply to protect coastal character. |
Properties in the protection zone are typically privately owned but the owner cannot build new residential structures (with some exceptions for pre-existing buildings and certain uses), extensions may be restricted, and land uses are limited. The exact impact depends on whether the property predates the Ley de Costas, its classification, and any specific consolidations. For buyers, the protection-zone restrictions can materially affect what you can do with the property — worth understanding before you buy.
Protection-zone restrictions can materially affect use
A property in the protection zone (typically 100 m inland from the DPMT boundary) is privately owned but faces restrictions on new construction, extensions and certain uses. If your plan is to extend, rebuild or convert, these limits matter — check them before you buy.
Concessions on the DPMT
Some buildings sit on land that is part of the DPMT — historically constructed before the current regime, or as beach-club/kiosk-style uses. These typically operate under state concessions: a defined-period right to use the space, not an ownership. Concessions have expiry dates and conditions, and renewal at the end of the concession isn't guaranteed — depending on the case, the property may need to be removed, or renewal may be granted on new terms.
When considering a "property" that turns out to be on the DPMT under concession, understand you're really buying the concession, with its remaining term and conditions, not a freehold. This has significant implications for value, mortgage-ability, resale, and long-term security. Not all coastal property is like this, but where it is, the transaction is fundamentally different. We identify concession situations at due diligence.
The Buyer's Risks
The main risks for expat buyers of coastal property:
- Buying "ownership" of something on the DPMT — where the reality is a concession, not ownership.
- Restrictions from the protection zone — inability to extend or convert as you'd planned.
- Concession expiry — planning long-term around a use-right that has a defined end.
- Deslinde revisions — the shore boundary can be reviewed and redemarcated, changing what's DPMT and what isn't.
- Uncertain title — historical claims and unresolved status on some coastal properties.
Not all coastal property carries these risks — many properties near the sea are perfectly clean and unaffected. But the fact that some are, and that the label "beachfront" or "coastal" can mean very different things legally, makes due diligence essential. This isn't an area to save legal fees on. We handle it thoroughly.
Coastal-Law Due Diligence
For any coastal property, the specific checks include:
Deslinde position
Where the DPMT boundary sits in relation to the property.
Zone classification
Whether the property is on the DPMT, in the protection zone, in the transit easement or beyond.
Concession status
If on the DPMT, whether a valid concession exists, its remaining term, its conditions.
Planning history
What was authorised, when — and whether there are any coastal-law enforcement issues.
Land Registry & title
How the property is registered and any coastal-law flags on the record.
These checks require going beyond the Land Registry to the Coastal Authority (Demarcación de Costas) and the town-hall planning department, and interpreting what's found in coastal-law terms. This is highly specialist due diligence that generalist property advisers may miss. We do it as part of coastal conveyancing.
How We Help
We handle coastal-law due diligence for buyers and advice for existing owners. Our team of legal specialists (working with bar-registered solicitors where a matter requires regulated legal representation) identifies the deslinde position, zone and concession status of a specific property; advises on the real ownership vs concession position; assesses protection-zone impacts on your plans; and advises on concessions — remaining term, conditions, renewal prospects. It's part of our conveyancing service for coastal property, in English, on a clear quote. If you're eyeing property near the sea, book a consultation before you commit.
Related Guides
Frequently Asked Questions
The Ley de Costas is the Spanish law governing the coastal zone. It defines the public maritime-terrestrial domain (DPMT) — the strip of coast, sand, cliffs and inter-tidal area that is public property and cannot be privately owned — and establishes protection and easement zones inland where restrictions apply. Its purpose is to protect the coastline as a national asset, preserving access, environmental value and public use of the shore. Properties in different zones face different regimes: some fully private and unaffected, some in protection zones with limits, some on the DPMT held only under concession. Buyers of coastal property need to know which category applies.
The DPMT (dominio público marítimo-terrestre) is the core coastal-law concept. It broadly includes the shore/beach and the strip subject to tidal action, cliffs, dunes and other natural coastal features, and any land formally demarcated as part of the DPMT by the state. Property on the DPMT is public and cannot be privately owned. Any construction standing on the DPMT typically operates under a concession — a defined-period right to use, not ownership. When the concession expires, the property may need to be removed or the concession renewed subject to conditions. This is where the "seafront property losing status" stories come from.
Inland from the DPMT, the law establishes several zones. The protection zone (servidumbre de protección) is typically a 100-metre strip inland from the DPMT boundary (reducible in urban areas), where private property exists but with restrictions on new construction and use to protect the coast. The transit easement (servidumbre de tránsito) is a narrower strip ensuring public passage along the shore. There's also an influence zone where certain planning considerations apply. Properties in the protection zone are typically privately owned but face restrictions — new residential construction is limited, extensions may be restricted, land uses are limited. Buyers' plans to extend or convert are affected.
It depends on where the property sits. Some coastal properties are entirely private and unaffected by DPMT — you own freehold. Others are in the protection zone — private ownership with restrictions. Others sit on the DPMT itself and are held under state concession, meaning you're buying the concession (a defined-period right) rather than freehold. The label "beachfront" or "coastal" can mean very different things legally. The single most important thing a coastal buyer can do is get the specific coastal-law status of the property checked before committing. We handle exactly this due diligence.
A concession under the Ley de Costas is a right granted by the state to use a portion of the DPMT for a defined period, on defined conditions. Historical constructions on the DPMT often operate under such concessions. Terms have a fixed duration and expiry date, and renewal at the end isn't guaranteed — depending on the case, the property may need to be removed, or renewal granted on new terms. When considering a "property" on the DPMT under concession, you're really buying the concession with its remaining term and conditions, not freehold — with implications for value, mortgage-ability, resale and long-term security. We identify concession situations at due diligence.
Generally no. Illegal builds on protected land — including coastal land under the Ley de Costas — are typically excluded from AFO/DAFO regularisation because enforcement doesn't time out on protected land. This is one of the worst-case scenarios for a coastal buyer: a build without proper authorisation on the DPMT or in an area where coastal law prevents legalisation is very difficult or impossible to regularise, and can face enforcement or demolition risk. This is exactly why coastal-law due diligence is essential before buying near the sea. We identify these situations.
Deslinde is the formal demarcation of the boundary between the DPMT and private land — literally marking where the public coast ends and private land begins. It's determined by the state Coastal Authority and recorded formally. Deslindes can be reviewed and redemarcated over time, which can change what's classified as DPMT and what isn't. This creates a potential risk: a property considered private today could be affected by a future deslinde revision. It's part of why coastal-law due diligence goes beyond the Land Registry to the Coastal Authority. We check the current deslinde position and consider revision risk.
Many coastal properties in Spain are perfectly clean and unaffected by DPMT — bought and used without issue. The Ley de Costas creates specific risks in specific situations, but it doesn't make all coastal property a bad buy. What it does mean is that due diligence has to include coastal-law checks, and where a property is in a protection zone, on the DPMT, or subject to deslinde/concession considerations, the transaction needs to be structured with eyes open. Do the due diligence, understand what you're buying, and if it's a clean protection-zone property or wholly beyond the coastal zones, you're fine. If it's on the DPMT under concession, know that's what you're buying. We give you a clear picture before you commit.