Plot outline differs from the documents: organising a review in Spain

Neutral AI illustration of two sheets with different abstract outlines, a transparent ruler, a pencil and a closed folder. These are not actual plot boundaries, a cadastral map or a measurement result.

At a house viewing, a buyer is shown a fence and then a plot plan, and the outlines seem different. The first reaction is to find out which line is “right”. But a visual impression does not yet explain the documents' origins, the nature of the discrepancy or its consequences. It is more useful first to gather the source information, formulate a precise question and identify who should investigate it before commitments are made.

This article concerns organising that review. It does not establish ownership boundaries, determine plot area or suggest drawing up a legally significant plan yourself. We do not assess the legality of buildings or whether a transaction can proceed. A working file helps give professionals a clear task and prevents an attractive drawing or a positive technical report from being mistaken for completion of every procedure.

Official concepts in brief

Catastro's FAQ describes an alternative graphical representation, RGA, as a georeferenced plan differing from the cadastral certificate's graphics when an interested party considers those graphics inconsistent with physical reality. Possible reasons include descriptive errors or property changes not yet recorded. Catastro recommends a competent professional, but does not state that only such a professional is entitled to prepare an RGA. The graphical validation report, IVG, assesses technical requirements and compatibility of the representation; it does not confirm the legality of operations or the existence of necessary permissions. The report accompanies, but does not replace, the cadastral updating procedure.

That is the extent of the official summary in this article. What follows is an editorial framework for questions and storing materials, not instructions for preparing an RGA or conducting a registration case. The precise route for a particular plot should be determined with appropriate professionals using its documents. There is no need to launch a technical procedure merely because two on-screen images look different.

Describe an observation without a ready-made accusation

Record exactly what raised doubt: one plan has a projection absent from another; a marked boundary runs differently relative to a visible reference point; area labels differ; a photo and diagram show different elements. Do not replace the observation with a claim of land encroachment, a neighbour's error or an illegal building. At this stage such conclusions remain unverified and hinder calm information gathering.

Attach images showing context and state who supplied them and when. If using a screenshot, also retain the original document or a link to its origin when available. A cropped image without a name, date or scale rarely explains the whole problem. Add your own arrow or caption only to a working copy and clearly distinguish it from the original graphics.

Establish exactly what is being compared

Ask the owner or representative to identify each file: where it came from, which property it describes, when it was issued and what its author intended it to confirm. A plan in a promotional presentation, a diagram in an old archive and an official-source document must not automatically fall into one category. A folder named “cadastre” does not itself establish the purpose of every attachment.

For each item, record its identifier, address, date and description of coverage if present. If a file includes several plots, note which one is being discussed. If the details are unclear, request an explanation rather than guessing from the outline's shape. An identical development name does not prove that two documents cover the same part of the land.

Do not turn an on-screen comparison into a measurement

Placing documents side by side helps an initial discussion, but do not calculate a legally significant area from a photograph or force one outline to fit another. Record unknown image parameters as a limitation, rather than remove them by arbitrary stretching. Do not create coordinates from approximate screen points. That can produce a convincing-looking file that does not answer the original question.

Give the professional the actual materials and a description of the doubt. Ask whether they are suitable for comparison and what additional information is needed. If a survey is required, define the scope and expected result beforehand. This article sets no acceptable discrepancies in metres or percentages: a universal figure without understanding the procedure and property would be unreliable guidance.

Gather the history without rewriting it afterwards

Separately ask whether changes occurred for which documents might exist: subdivision, consolidation, construction or another operation. Record the answer as a named person's statement, not an established fact. Request available supporting evidence and arrange it by date. If information is absent, mark the gap. Documentary history cannot be reconstructed solely from what is visible in the yard now.

Keep old and new versions separately. A later file must not automatically be regarded as the final result of an official amendment: clarify its status. Three columns are useful in a working log: received, explained and requires checking. They allow discussion without endlessly forwarding identical attachments and show where information is still insufficient.

Commission a clearly explained scope of technical work

Describe the purpose in your request: understanding a particular discrepancy before purchase or preparing materials for a later procedure. Do not vaguely order “correcting the cadastre” if the problem is not yet known. Ask which source materials will be studied, whether a site visit is needed, what the final package will include and which questions remain outside the work's scope.

Also discuss access conditions and communication with the owner. Do not enter other people's land or move fences for a check. If a survey involves several plots or common areas, arrangements must be agreed through the responsible people. Interest in purchasing does not justify independently changing the situation on site or exercising control over neighbouring property.

Separate a technical file from a legal outcome

Each result received should have a clear name: working diagram, professional assessment, technical report or a document confirming a particular procedural stage. Do not put everything into a “corrected” folder as soon as a new image arrives. Ask the provider to explain separately what has been done, to whom materials were sent and which confirmation is still awaited.

When shown a positive IVG, a useful question is: “Which technical check does this report confirm, and what further steps remain in our case?” Do not rename it a building permit, proof that there is no dispute or final registration. A positive result must be read alongside the document's purpose, not instead of it.

Prepare the conversation with a legal professional

Provide not only the final diagram but also the original observation, document list and open questions. Ask whether the issue found affects the planned transaction and what checks are needed before it continues. Do not seek a universal answer from one photo. A lawyer or another competent party may need information the technical provider did not examine.

If purchase dates are already being discussed, say so directly, but do not use a deadline as a reason to declare the issue immaterial. Ask for a record of which decisions can be made on available data and which need an additional result. Contract terms, allocation of responsibility and action while checks remain unfinished must be agreed individually, not copied from an editorial checklist.

Do not argue with neighbours using an edited screenshot

A boundary question may affect other people. For first contact, choose neutral wording: “We are gathering documents to understand the difference between the plans.” Do not publish images of another person's plot with accusations or present a tentative conclusion as final. If formal interaction is needed, ask the professional handling the particular case about the procedure.

Store your own file carefully too. Documents may contain personal information unnecessary for general discussion. Before forwarding, check the recipient and purpose; do not post the full package in an open group to seek advice. At the same time, do not remove original identifying details from your own archive copy: they are needed to understand the materials' origins and sequence.

An example of a precise brief instead of “make everything legal”

A working request could read: “We are considering purchasing the identified property. The outlines in the attached documents differ in the marked part. Please establish whether the materials relate to the same land, which data can be compared, whether an additional survey is needed and which questions fall outside the technical check. We expect a description of results and remaining stages, not just a new drawing.” This neither picks someone to blame in advance nor promises an outcome.

After the reply, make a short plan: what action is necessary, who is responsible, what input material is needed and which document will confirm the result. If the professional offers several options, preserve the conditions for choosing, not just the price. You can then revisit the decision later and understand why a particular route was selected.

Check completion against the documents

At the end, compare the initial questions with the answers actually received. Some discrepancies may be explained while others still require examination; a submission package may be prepared without a final result having arrived. Record these statuses separately. “Checked” is useful only when it is clear what was checked and by whom, not merely because every attachment is in one folder.

Keep the final materials with the version log and a brief explanation of remaining limitations. Buyers need to understand not only an attractive final plan but the limits of the work performed. An organised file does not guarantee freedom from disputes or replace official procedures; it helps preserve their meaning between viewings, consultations and later decisions.

Official source read on 30 October 2026: Catastro FAQ on RGA and the graphical validation report. Definitions and limitations of the technical check were used, not instructions for independently formalising boundaries.