New construction blocked by adjoining owners: what changes in the Registry

Key data

If you are processing the registration of new construction or a boundary modification in the Property Registry, an adjoining owner can block your process. It is not a theoretical threat: it is exactly what happened in the case resolved by the General Directorate of Legal Security and Public Faith (DGSJFP) through a resolution of December 26, 2025, published in the BOE on April 27, 2026 with reference BOE-A-2026-9145.

The property registrar of Mazarrón suspended the registration of a new construction declaration deed because holders of adjoining properties opposed it during the procedure under Article 199.2 of the Mortgage Law. The developer appealed. The DGSJFP resolved that appeal and, in doing so, established criteria that now apply to any similar transaction in Spain.

What does this regulation establish?

Article 199.2 of the Mortgage Law regulates the coordination procedure between the Property Registry and the Cadastre. When an owner wants to register new construction or modify the boundaries of their property, the registrar must notify the holders of adjoining properties so they can make any allegations they deem appropriate.

If an adjoining owner opposes, the registrar may suspend the registration. But not any opposition is sufficient. The DGSJFP resolution establishes two fundamental criteria:

• The opposition must be properly substantiated: it is not enough to oppose generically. The adjoining owner must justify why the registration affects their rights.
• The opposition must affect real rights of the adjoining owner: mere disagreement or conflict of interests without legal basis is not sufficient to paralyze the procedure.

The resolution also clarifies the registrar's role: they must assess whether the opposition meets those requirements before suspending the registration. They cannot suspend automatically upon any opposition document.

Economic and operational impact

For developers and owners, a registry suspension has direct consequences on the business:

• Paralysis of the transaction: without registration in the Registry, new construction cannot be mortgaged, sold with full guarantees, or transferred safely.
• Appeal costs: if the registrar suspends the registration, the owner must file an appeal with the DGSJFP or resort to judicial proceedings, with the costs of fees and time involved.
• Delays in commercialization: in real estate developments, each week of delay in registration can mean significant financial costs and loss of sales opportunities.
• Risk of conflict with adjoining owners: if the opposition has legal basis, it can lead to litigation over boundaries or real rights that extends the process for months or years.

For holders of adjoining properties, the resolution also has implications: they now know with greater precision what requirements their opposition must meet to be heard by the registrar, which strengthens their position if they act correctly.

Who does it affect?

• Real estate developers who declare new construction and need to register it in the Property Registry.
• Individual owners who build on their own land and want to register the building.
• Construction companies that act on behalf of developers and manage registry documentation.
• Legal advisors and notaries who process new construction declaration deeds.
• Holders of adjoining properties who want to exercise their right to oppose the Registry.
• Real estate asset managers with properties in areas where boundary conflicts may exist.

Practical example

A developer in Mazarrón declares new construction on a plot and presents the deed to the Property Registry for registration. The registrar initiates the procedure under Article 199.2 of the Mortgage Law and notifies the owners of adjoining properties.

One of the adjoining owners files an opposition document alleging that the construction invades part of their land and affects a right of way they have recognized. The registrar, assessing that the opposition is substantiated and affects real rights of the adjoining owner, suspends the registration.

The developer appeals to the DGSJFP. The resolution of December 26, 2025 analyzes whether the registrar acted correctly in suspending, applying the criteria that are now established: if the adjoining owner's opposition met the requirements of substantiation and impact on real rights, the suspension was justified. If it did not meet them, the registrar should have continued the procedure.

This case illustrates why it is critical, before initiating the registry procedure, to identify possible conflicts with adjoining owners and resolve them or document them appropriately.

What should companies do now?

1. Review pending new construction files awaiting registration: identify whether there are adjoining properties whose holders may have founded reasons to oppose before presenting the deed to the Registry.
2. Document the state of boundaries: obtain updated cadastral certification and, if there are discrepancies with physical reality, resolve them before initiating the procedure under Article 199.2 of the Mortgage Law.
3. Preventively contact adjoining owners: in developments where possible boundary conflicts exist, a prior agreement with the adjoining owner avoids opposition and registry suspension.
4. Seek advice on the resolution criteria: the DGSJFP has set what requirements an opposition must meet to be sufficient. Knowing those criteria allows you to anticipate whether an opposition has or does not have basis to succeed.
5. Prepare the appeal if suspension already exists: if your registration is already suspended due to opposition from an adjoining owner, analyze whether that opposition meets the requirements set by the resolution. If it does not meet them, the appeal to the DGSJFP has solid grounds.