Modular Construction and Licensing in Portugal: The Application of RJUE to Industrialised Construction

Modular construction has gained prominence in recent years in Portugal, defined as a method in which building components—modular, structural or otherwise—are mainly produced in an industrial setting and then assembled on the final site. This advancement creates new opportunities for the sector, but also demands strict adherence to legal standards, particularly under the Legal Framework for Urbanisation and Building (RJUE).

Modular House in Alentejo, Portugal

What Sets Modular Construction Apart

• Industrial production of building elements, resulting in efficiency and quality control

• Significant reduction in construction time, with less waste and minimal impact onsite

• Architectural flexibility and greater customisation potential

• Easy adaptation to environmental and energy requirements

Licensing Modular Construction under the RJUE

Following recent amendments, the RJUE explicitly includes permanent modular construction within the regulations applied to traditional building. For licensing, this means:

• The licence request or prior communication is submitted to the Mayor

• All plans and specialties must be signed by a legally qualified professional with a statement of responsibility

• Supporting documents must meet the same clarity and technical conformity as required for traditional construction and reference all applicable local plans and regulations

• General rules apply: preparation, consultation, review, decision, and inspection phases follow the same path as conventional construction

Permanent modular construction is therefore subject to the same licensing rules and procedures as traditional buildings in Portugal.

Types of Urban Operations

The RJUE distinguishes:

• Construction of new buildings

• Reconstruction after partial or total demolition

• Extensions altering area, height, or volume

• Alterations physically modifying a property without increasing its area

• Conservation and maintenance

For modular construction, these concepts apply to the entire process, from foundations to finishes, even when prefabricated elements are used.

Requirements for Licensing Modular Construction

• Compliance with the planning parameters defined by municipal plans (PDM, PU, PP)

• Submission of an architectural project compatible with the location and current legislation

• Clearly stated modular construction systems

• Detailed technical statement confirming structural safety, sanitation, and energy efficiency

• Possibility of strengthened inspection at all stages of the build

Interior of the Modular House in Alentejo, Portugal

Advantages and Challenges

Advantages

• Rapid project completion

• Factory-controlled quality

• Easy future extension or reconfiguration

• Reduced periods of noise, dust, and urban disturbance

• Increased cost and timeline predictability

Challenges

• Technical and legal recognition of modular systems (certification of methods and materials)

• Integration into consolidated urban or heritage areas, requiring formal compatibility

• Adaptation to municipal regulations, which may have specific conditions for innovative methods

Practical Advice for Developers

• Consult the Municipal Council in advance regarding acceptance of modular systems in your area

• Assemble all technical documentation and ensure your module suppliers meet the necessary compliance and certifications

• Prioritise integration with the urban context and verify the project meets current requirements

• Have a specialised architectural team oversee the project from conception to completion and final handover

Practical Example: A modular home, factory-built with pre-assembled elements, can be licensed as a new build under the RJUE. The promoter must supply full data on the modular system, material specifications, technical guarantees, and demonstrate compatibility with the local urban plan.

Key Takeaway

Modular construction is a modern response to the construction sector’s needs, combining efficiency, sustainability, and flexibility. However, its implementation relies on correct application and interpretation of the RJUE, thorough technical documentation, coordination with local regulations, and, above all, the support of skilled professionals for every stage of the project.

The transformation of the construction sector in Portugal depends on clear recognition of the advantages of this approach. To ensure your modular project meets all legal and planning requirements, contact AC-Arquitetos. Here, expert guidance makes all the difference for the success, value, and legalisation of your industrialised construction.