
Repainting or renovating a facade without permission can cost much more than just a can of paint. In Belgium, facade renovation often requires a planning permit, even for work deemed to be "cosmetic."
There are strict urban planning requirements, and ignoring the formalities involved in renovating a house's facade can result in severe penalties or prevent a resale.
This article helps you determine when a permit is required, identify the steps required depending on the type of work, and better understand the conditions for regularization.
Facade renovation encompasses all work intended to restore, embellish, or modernize the exterior appearance of a building. This may consist of cleaning, stripping, repairing cracks or damage, repainting, or replacing certain visible architectural elements. Other more extensive work may include changing the cladding (such as roughcast, siding, or render), adding external insulation, or transforming windows, frames, and railings. Depending on the case, this may involve simple refurbishment or more significant aesthetic changes.
It is important to distinguish between the different levels of intervention, as they do not all have the same urban planning implications. Maintenance refers to limited actions that keep the façade in its original condition (cleaning, painting in the same color, minor repairs).
Renovation goes further but aims to preserve the original appearance, for example by replacing damaged materials with identical ones. Transformation, on the other hand, visibly changes the structure, material, or color of the facade. This is the case if you switch from brick to wood siding, or if you change the layout and dimensions of the openings. These distinctions are crucial in determining whether a permit is required.
In summary: Facade renovation includes work ranging from simple cleaning to visible transformation, with varying urban planning implications depending on the scope of the work.
In Belgium, the requirement to obtain a planning permit depends mainly on the impact of the work on the appearance of the property.
If the work does not change the visible appearance or faithfully reproduces the existing structure, it is often considered maintenance or minor renovation and may be exempt.
However, when a change in color, material, cladding, or structure is noticeable, a permit is generally required. The authorities are keen to preserve urban harmony, especially in neighborhoods with heritage or aesthetic value.

Antoine HORENBEEK
As soon as the work affects the exterior appearance of the building, it almost always falls within the scope of the permit. Changing the color of the facade, installing new cladding, insulating the exterior, or modifying the layout of the windows are all typical examples.
In some municipalities, even a minor change visible from the street can trigger the obligation. In Wallonia, the Territorial Development Code (CoDT) sets strict rules, particularly in classified areas or protected perimeters.
Authorization is therefore essential, just as it is for other visible work such as installing solar panels.
Minor maintenance work— cleaning, identical repairs, painting with the same color —is often exempt from permits. Annex IV of the CoDT also specifies certain activities that are subject to a simple prior declaration rather than a full permit. But be careful: as soon as there is a visible change or potential damage to the architectural or landscape interest, these tolerances no longer apply. To avoid any unpleasant surprises, it is essential to consult the local regulations of your municipality before starting work.
In summary: A permit is required whenever the work visibly alters the façade, with limited exceptions for minor maintenance and identical work.
Carrying out renovation work without the required permit constitutes a planning offense, recognized in all three regions of the country.
In Wallonia, the CoDT defines this as an act carried out without authorization or in conflict with an existing permit. This offense can be detected at any time, often during an inspection, a report, or when a property is put up for sale.
The offense remains illegal even in the absence of a complaint, and no one is immune from subsequent enforcement of compliance.
Penalties vary depending on the severity of the offense. A property owner may be subject to an administrative fine (which can be substantial), be required to restore the property to its original condition—which may include demolishing the modified elements—or be prevented from selling the property until the situation is rectified.
Non-compliance can also prevent you from receiving a bonus, credit, or insurance coverage. In certain sensitive areas, such as classified perimeters, the authorities may also initiate legal proceedings.
An unresolved violation acts as a real black mark on a property's urban planning record. It complicates any future attempts at regularization, including other elements that may have nothing to do with the facade. The administration may refuse a new project or impose restrictive conditions due to an unresolved situation.
Regularizing every violation, even old ones or those deemed "minor," is essential to preserving the value and urban stability of the entire property.
In summary: Renovating without a permit can result in fines, a block on the sale, or complications for any other future regularization of the property.
It all starts with a feasibility study.
The objective: to determine whether the renovation, as carried out, complies with current urban planning criteria. The analysis takes into account the legislation in force, the building's environment, its architectural specificities, and any potential past disputes.
Three scenarios are then possible: regularization is immediate, it is possible subject to adjustments, or it is excluded, which requires restoration to compliance.

Antoine HORENBEEK
Regularization requires a comprehensive, ambitious, and rigorous application. It must explain in detail the work carried out, justify its urban compatibility, and demonstrate its visual and aesthetic integration.
It includes plans of the existing structure, a descriptive analysis of the work, a history, photos, technical documents (materials, insulation), and relevant legal support. This work is essential to convince the authorities of the legitimacy of the request.
Once the file has been compiled, it is submitted to the urban planning department of the municipality concerned. The procedure then follows the standard process for a permit application: acknowledgment of receipt, validation (or not) of completeness, possible public inquiry, opinion of the municipality, and final decision.
Close monitoring, regular dialogue with the administration, and well-reasoned responses to requests for clarification are key to successful regularization.
In summary: Regularizing unauthorized renovation work requires detailed expertise, a solid case file, and precise support from the authorities.
Modifying a facade without a permit may seem harmless, but the consequences can be serious if the situation is not rectified in time. Every day of delay complicates the defense of your case in the event of an inspection.
At Ubex, our team of experts will review your case confidentially and guide you from the very first conversation. Contact us now to see if regularization is possible and how to implement it effectively.
We're here to sort this out, methodically, without judgment.
Author : CORNIL Olivier
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