Information consulted
We identify the sources and distinguish what is documented, what has only been stated and what remains to be confirmed.
Safe Purchase · free Property Check
Before you buy, know what you are actually buying
Are you about to buy a house, a plot of land or a rural property in Portugal? We carry out a free preliminary check of the main planning, documentary and technical signals and tell you what should be confirmed before you commit to a purchase.
FreeOne property per requestNo commitment
Request the free Property Check Initial screening · no commitment
Share the listing, the location and what you intend to do.
What you receive
A short, clear and useful screening to decide the next step
The Property Check is delivered as a clear 2-page summary, based on the listing, the material you send and the public information available.
Main signals
We highlight the planning, documentary or technical signals that deserve attention before buying.
Evidence gaps
We indicate what documentation or information is missing for a safer conclusion.
Next steps
We prioritise between two and five checks and say whether it makes sense to move on to a paid analysis.
For which properties
A first check adapted to your objective
House or apartment
To understand signs of divergence between the situation advertised, the documents available and what actually exists at the property.
Urban plot
To make a preliminary reading of the planning framework and understand which parameters or constraints require confirmation.
Rural or mixed land
To identify signals linked to the classification of the land, REN (national ecological reserve), RAN (national agricultural reserve), easements or other relevant regimes.
Refurbishment, tourism or investment
To compare the intended objective with the information available and define the appropriate steps before investing.
Preliminary reading
What we look at and how we present the result
Four groups of signals
- Documents. How they match up and which relevant items are missing.
- Built situation. Signs of annexes, extensions, pools or other structures to be checked.
- Planning framework. Classification of the land, territorial plans and the most evident constraints.
- Buyer's objective. Signs of compatibility or of the need for a deeper analysis.
Two independent assessments
Preliminary compatibility of the objective. What the available material allows us to say about the buyer's intention.
Completeness of the evidence. Whether the information available is enough for a screening or whether there are relevant gaps.
A property does not get a reassuring reading simply because documents are missing.
Green
No evident blocking signal was identified in the material available.
Amber
There are points that should be confirmed before making a commitment.
Red
A material risk signal was identified and requires attention.
Grey
The information available is not sufficient for a responsible screening.
Important: a green result does not confirm that the property is fully regularised, nor does it guarantee that the objective will be approved. The result should always be read together with the completeness of the evidence.
Process
From the listing to the next step, with no automatic commitment
- 1
Send us the property
Share the listing, the location, your objective and the documents you have.
- 2
We run the screening
A technician reviews the main signals based on the material received and on public sources.
- 3
Receive the Property Check
We send the summary with the preliminary result, the gaps and the recommended checks.
- 4
Decide what to confirm
Any further analysis is optional and presented separately, with its own scope and fees.
Sample cases
Two properties. Two types of risk. The same principle: confirm before buying.
The cases below show how the Property Check turns the buyer's initial information, the listing and public sources into a first decision: what appears supported, what remains to be confirmed and when a deeper technical and planning analysis is needed.
The cases are illustrative and were prepared from public information and consultation scenarios. The documents are not valid for decisions relating to a real property, carry no signature and do not replace an up to date verification of the applicable material.
Case 01 · Urban plot
Plot no. 15
Azinheira dos Barros · Grândola
"I want to buy this plot to build a T3 house (three bedrooms) of approximately 140–150 m². Do the parameters advertised really allow this project?"
- 250 m² of land
- 100 m² footprint
- 150 m² of building area
- 1 dwelling · 1,5 floors
- Semi-detached with Plot 14
Preliminary resultAmber: objective compatible in principle, subject to documentary validation.
See the case →Case 02 · Rural property with PIP
Rural property
São Francisco da Serra · Santiago do Cacém
"I am considering buying a rural property of about 55 hectares, presented with a PIP and several building scenarios. What is actually confirmed?"
- PIP stated from 2023
- Four area scenarios
- 500 / 5 495 / 4 000 / 6 000 m²
- REN · cork oak montado
- Divergences in the calculations
Preliminary resultAmber / grey: there is relevant material, but the evidence does not allow the advertised building rights to be confirmed.
See the case →Case 01 · Urban plotUrban plot · Azinheira dos Barros
Urban plot in Azinheira dos Barros: a house of 140–150 m²
Does a house of 140–150 m² really fit on this plot?
The client's request
A client interested in acquiring Plot no. 15, in Azinheira dos Barros, contacted CertiAmb before making an offer. He intended to build a T3 house (three bedrooms) for permanent residence, with an approximate area of 140–150 m², and wanted to understand whether the parameters published for the plot were compatible with that objective.
He had the tax register and land registry identification and municipal information with specific parameters for the plot. He did not yet have the up to date certidão do registo predial (land registry certificate), the title and plan of the loteamento (subdivision), nor the zoning and constraints extracts for the parcel.
Information available at the start of the analysis
PlotNo. 15 · Azinheira dos Barros
Artigo matricial (tax register article)910
Land registry description286/19980430
Plot area250 m²
Footprint indicated100 m²
Building area indicated150 m²
Dwellings1
Floors1,5
Semi-detached linkWith Plot 14
Property Check result
Amber: confirm before proceeding
The residential objective of 140–150 m² finds preliminary support in the published parameters. However, the exact solution depends on validating the loteamento (subdivision), the buildable envelope, the 1,5 floors rule, the semi-detached link with Plot 14 and the applicable parcel plans.
What the screening found
What appears supported
- One residential dwelling
- Building area of up to 150 m², in principle
- A possible solution spread over more than one level
- Existence of specific municipal parameters for the plot
What remained to be confirmed
- Ownership, encumbrances and current land registry description
- Plan and title of the loteamento (subdivision)
- Buildable envelope and exact relationship with Plot 14
- Zoning and constraints over the parcel
- Applicable interpretation of the 1,5 floors
- How annexes and ancillary areas are counted
What this meant for the buyer
The question was no longer simply "can I build?". The information available indicated that there was residential capacity in principle. The decisive question became: "does the house I want fit within the envelope and the binding conditions of this plot?"
Documents from this case
Stage 1 · Free
Property Check
- buyer's objective;
- information consulted;
- main signals;
- evidence gaps;
- actions before the offer or CPCV (promissory purchase contract).
Open Property Check · PDF →
Stage 2 · Paid
Technical and Planning Opinion
- applicable planning instruments;
- parameters and calculations;
- risk matrix;
- alternatives and mitigation measures;
- G1–G6 roadmap.
Open Technical and Planning Opinion · PDF →
Case 02 · Rural property with PIPRural property with PIP · São Francisco da Serra
Rural property in São Francisco da Serra: PIP, areas and constraints
Do an old PIP and large advertised areas confirm the potential of the property?
The client's request
A client interested in acquiring a rural property of about 55 hectares, in São Francisco da Serra, contacted CertiAmb before making an offer. The listing mentioned a PIP (prior information request) and set out different possibilities for building and use.
The client wanted to understand whether those possibilities were still valid, which areas were actually supported and which risks should be clarified before the purchase.
What was presented to the buyer
PIPRegistered on 13.06.2023
Scenarios stated500 / 5 495 / 4 000 / 6 000 m²
Existing dwelling45 m²
Outbuilding16 m²
Covered area stated96 m²
Constraints mentionedREN · cork oak montado · ecological structure
Property Check result
Relevant information, but not sufficient to confirm the advertised potential
The listing and the summary of the PIP indicated a potential that justified analysis, but they did not allow the areas and uses presented to be treated as current, confirmed rights. The decision depended on consulting the municipal file, on the validity and scope of the PIP, on the PDM (municipal master plan) currently in force and on the parcel overlaps.
Preliminary compatibility: amber Sufficiency of the evidence: grey
What raised questions
PIP from 2023 · validity and current effects
The PIP was stated as registered on 13 June 2023. Its actual effect for a later operation could not be assumed without consulting the municipal file and verifying the acts carried out within the applicable period.
Change to the regulatory framework
The PDM in force at the date of the analysis was no longer the same framework that existed when the PIP was submitted. The new PDM for Santiago do Cacém came into force in 2025, so it was necessary to distinguish the effects of the earlier PIP from the rules currently applicable.
Inconsistency identified in the commercial information
549 500 m² × 0,2 = 109 900 m²
The listing presented 10 990 m² as the result. To arrive at that figure, the factor would have to be 0,02 and not 0,2. The area could not, therefore, be accepted without validating the source and the method of calculation.
Divergence in the existing areas
45 m² + 16 m² = 61 m² · covered area stated: 96 m² · difference: 35 m²
The difference could result from annexes, undescribed structures, different measurement criteria or out of date information. None of these hypotheses should be assumed without land registry documents, plans and technical verification.
What required cartographic and regulatory validation
RegimeREN
RegimeMontado and cork oak
Municipal planEcological structure
LandClassification and categories
InfrastructureAccess and networks
PIPExact location of the areas
The existence of these regimes does not automatically mean that the whole property is blocked or that all the areas are available. The effect depends on the exact overlap between each constraint, each parcel and the specific siting of the operation.
What this meant for the buyer
The Property Check could not confirm the four scenarios as current building rights. It did, however, identify precisely why it was not safe to base an offer on the listing alone, and which documents and checks were needed to turn commercial potential into a technical conclusion.
Why a Technical and Planning Opinion was recommended
The answer required more than a preliminary screening: it was necessary to analyse the PIP and its file, the law applicable over time, the PDM in force, the areas and calculations presented, the territorial constraints and different development alternatives.
What the paid analysis then covered
- validity and procedural status of the PIP;
- earlier regulatory framework compared with the one currently in force;
- separation between confirmed facts and information from the seller;
- recalculation of the areas presented;
- overlaps of REN, montado and ecological structure;
- formal risk matrix;
- alternative development scenarios;
- mitigation measures;
- G1–G6 verification roadmap.
Documents from this case
Stage 1 · Free
Property Check
- buyer's request;
- information from the listing and the PIP;
- inconsistencies identified;
- evidence gaps;
- steps before the offer.
Open Property Check · PDF →
Stage 2 · Paid
Technical and Planning Opinion
- PIP and municipal file;
- law applicable over time;
- recalculation of areas;
- risk matrix and alternatives;
- G1–G6 roadmap.
Open Technical and Planning Opinion · PDF →
What the two cases show
The same visual result can hide very different situations
Azinheira dos Barros
São Francisco da Serra
Type
Urban plot
Large rural property
Initial signal
Published parameters for the plot
PIP and several building scenarios
Central question
Does the intended house fit the conditions of the plot?
Do the advertised possibilities still apply today?
Property Check
Objective preliminarily compatible
Evidence insufficient to confirm
Main risk
Subdivision documents and exact configuration
PIP, new PDM, calculations and constraints
Next step
Technical and Planning Opinion and preliminary study
Full Technical and Planning Opinion and municipal verification
In the first case, the residential potential found support in the published parameters, but its exact configuration remained to be confirmed. In the second, the existence of a PIP and of large advertised areas was not enough to confirm the current potential of the property.
In both cases, the Property Check identified the appropriate next decision. Where the information available did not allow a safe conclusion, it showed why a deeper analysis was needed, without automatically starting any paid service.
After the Property Check
The next step depends on the risk identified
The Property Check does not create a compulsory sequence of services. The recommendation depends on the property, on the buyer's decision and on the questions that need confirmation.
Situation found
Next step
A specific technical or documentary question
Technical and Planning Opinion
Documents are missing or data remains to be confirmed
Specific checks
It is not clear whether the intended scenario is admissible
Planning Feasibility
There are signs of non-compliance in what has already been built
Legalisation of existing buildings
The direction is already confirmed
Design and Licensing
Each step is proposed and contracted separately, with its own scope, timescale and fees. No paid service is started automatically.
For more complex acquisitions
Technical due diligence
In-depth analysis for investors and developers, which may cover planning compliance, the condition of the buildings, technical risks, documentation and the need for further verification.
The Technical and Planning Opinion answers a specific question or looks in more depth at the risks identified in the Property Check. Technical due diligence brings together several lines of verification and is intended above all for more complex acquisitions, investors and transactions with greater exposure.
Scope
What the free screening does not replace
The Property Check is not a technical or legal opinion and does not, on its own, confirm that the property is fully compliant or feasible.
- detailed analysis of articles and regulations;
- formal risk matrix;
- calculation of areas or parameters;
- in-depth analysis of REN, RAN, SRUP or other regimes;
- municipal history of the property;
- requests to the câmara municipal (municipal council), the land registry office or other bodies;
- site visit or technical inspection;
- structural assessment;
- formal confirmation of buildability or legalisation;
- legal due diligence.
Frequently asked questions
Questions about the Property Check
Is the Property Check really free?
Yes. The preliminary screening of one property is free. If further checks or a Technical and Planning Opinion are needed, we first present a separate proposal with scope, timescale and fees.
Does it confirm that the property is fully regularised?
No. It identifies risk signals, missing information and recommended checks. It does not replace technical or legal due diligence, a formal opinion or a municipal decision.
Can I make a request with only the link to the listing?
Yes. The link and the location are enough to start the screening. The more documentation is available, the clearer the assessment of the quality of the evidence can be.
Which documents can I send?
Caderneta predial (tax register extract), certidão permanente (permanent land registry certificate), plans, licença de utilização (use permit), the technical data sheet, photographs or material provided by the seller. Do not send unnecessary personal documents.
Does it include a site visit or technical inspection?
No. The free screening is documentary. A visit or inspection can be proposed separately where it is needed.
Am I obliged to contract the next step?
No. The Property Check indicates the recommended steps. Each further service is optional and presented separately.
Related services
Next step
Planning Feasibility
Analysis of what can be built, extended or developed before investing in the design.
See Planning Feasibility →Legalisation of existing buildings
Analysis and regularisation of existing buildings that do not match the approved records.
See Legalisation →Design and Licensing
Architecture, coordinated engineering disciplines and follow-up of the procedure through to the municipal decision.
See Design and Licensing →Before you commit
Start with what needs to be confirmed
Share the property and your objective. We run a preliminary screening and set out the next steps without automatically starting any paid service.
Usual reply within 1–2 working days.