Preliminary Information and Urban Planning Certificate: Two instruments for the success of your project
- Ana Carolina Santos

- Nov 20
- 5 min read
Before starting any construction or urban intervention project in Portugal, it is essential to understand the tools available to assess the feasibility of your idea. Among the most important instruments are the preliminary information and urban planning certificates—two distinct mechanisms that, although often confused, serve specific and complementary purposes in the planning and execution process of urban operations.
For those unfamiliar with the intricacies of urban legislation, these two types might seem similar, but in truth, each has particular characteristics, applications, and advantages that are important to know in order to make informed and strategic decisions.

What is Preliminary Information?
Preliminary information is an administrative procedure that allows interested parties to obtain clarifications about the feasibility of an urban operation before submitting a formal licensing request. Regulated in articles 14 to 17 of the RJUE (Legal Regime of Urbanization and Building), this tool acts as a prior consultation with the municipal administration.
Characteristics of Preliminary Information
Preventive and guiding function:
Allows evaluating whether a certain urban operation is admissible at the intended location
Identifies applicable legal or regulatory constraints
Guides on necessary licensing procedures
Response deadline:
The Municipal Council must respond within 60 days
This deadline can be suspended once for 30 days to request clarifications
Validity period:
Preliminary information remains valid for 18 months after issuance
This period allows for calm project development planning
Advantages of Preliminary Information
Risk reduction:
Avoids unnecessary investments in unfeasible projects
Identifies constraints before detailed project development
Allows adjustment of expectations and strategies
Simplification of future processes:
Exempts consultations with external entities in subsequent procedures
Accelerates the licensing process afterward
Provides greater legal security
Flexibility:
Can cover different types of urban operations
Permits evaluation of alternatives prior to defining the final solution
Urban Planning Certificates: Official Status Documents
Urban planning certificates are official documents issued by Municipal Councils certifying the urban situation of a property or land. Unlike preliminary information, which is prospective, certificates are declarative of the existing situation.
Types of Urban Planning Certificates
Location certificate:
Confirms property location
Identifies applicable territorial management instruments
Specifies permitted land use
Constructive viability certificate:
Indicates applicable urban parameters
Specifies occupancy and usage indices
Identifies easements and public utility restrictions
Certificate for specific purposes:
Can be requested for various purposes (commercial, legal, banking)
Adapts to the specific needs of the applicant
Characteristics of Certificates
Issuance deadline:
Usually issued within 10 business days
Faster deadline than preliminary information
Validity:
Typically valid for 6 months
Shorter validity period than preliminary information
Document nature:
Provides official proof of the urban situation
May be required by banking or other institutions
Has legal value for various procedures
Fundamental Differences between the Two Instruments
Purpose | Preliminary Information |
Assesses future operation feasibility | Certifies current property status |
Provides guidance for project development | Proves existing situation |
Consultative and preventive nature | Declarative and evidentiary nature |
Scope of application
Preliminary Information:
Suitable for those planning a development project
Useful in planning and design phases
Recommended before significant investments
Urban Planning Certificate:
Necessary to prove legal status of a property
Required in real estate transactions
Requested by financial entities for loan approval
Response deadline and validity
Preliminary Information:
Response deadline: 60 days
Validity: 18 months
More complex analysis
Urban Planning Certificate:
Response deadline: 10 business days
Validity: 6 months
Simpler and faster procedure
When to use each instrument?
Opt for Preliminary Information when:
Planning new construction or significant expansions
Assessing feasibility of an investment project
Needing guidance on licensing procedures
Seeking legal security before advancing projects
Developing complex operations possibly involving multiple entities
Request an Urban Planning Certificate when:
Buying or selling a property
Applying for bank credit for purchase or works
Proving legal status of a property
Needing official documentation for administrative procedures
Meeting specific legal requirements

Procedural Aspects to Consider
Required documentation
For Preliminary Information:
Application with clear identification of the intended operation
Graphic elements demonstrating the intention
Descriptive report of the urban operation
For Urban Planning Certificate:
Precise identification of the property (land registry/matrix)
Indication of the type of certificate requested
Specific purpose of the certificate
Associated Costs
Both procedures require payment of municipal fees, with rates varying between municipalities. It is advisable to consult the specific municipal regulations to know applicable fees.
Complementarity of Instruments
In professional practice, preliminary information and urban certificates complement each other. Well-structured projects can benefit from both instruments at different moments:
Initial phase: Urban certificate to understand the current land status
Planning phase: Preliminary information to validate project feasibility
Execution phase: Use of valid preliminary information to expedite licensing
The choice between preliminary information and urban planning certificate should not be seen as mutually exclusive but rather as selecting the most appropriate tool for each phase of project development.
Impact of Digitalization
The modernization of administrative processes through the Electronic Platform for Urban Procedures has simplified the request for both preliminary information and urban certificates. This digital evolution enables:
Electronic submission of requests
Real-time tracking of process status
Reduction of processing times
Greater procedural transparency
Practical Advice
For Developers and Investors:
Always request preliminary information before acquiring land for development
Maintain the validity of preliminary information throughout the project
Consult specialized technicians to correctly interpret responses
For Property Owners:
Keep certificates for your properties up to date
Request specific certificates for each intended purpose
Check validity periods before using certificates
For Technicians:
Carefully analyse conditions established in preliminary information
Integrate identified constraints in project development
Maintain regular communication with municipal services during the process
To Consider
Preliminary information and urban planning certificates are fundamental instruments for the success of any construction or urban intervention project. Understanding their differences, potentials, and limitations allows for more informed decisions and avoids unpleasant surprises during project development. Preliminary information stands out as a strategic planning tool, providing the security necessary for significant investments, while urban certificates serve as proof documents of the legal status of properties. Both instruments reflect the importance of a preventive approach in urban planning, allowing difficulties to be anticipated and resources optimized. Appropriate use contributes not only to the individual success of projects but also to more orderly and sustainable urban development.
Knowledge of these mechanisms is essential for all involved in the construction process—from owners to technicians, investors, and developers. Investing time in understanding these instruments is an investment in the success of your future projects.
Need clarifications about preliminary information or urban certificates for your project?
AC-Arquitetos has the experience and knowledge to guide you through urban procedure aspects. Contact us for a personalized consultation and discover how we can help transform your ideas into reality with full legal compliance and maximum procedural efficiency.



