198 residential burglaries were recorded in Grimbergen in 2025. After several years of decline, the curve has turned: up 10.6 % in one year. That amounts to 3.8 incidents per week in a municipality of houses with gardens — and it shifts the question, which is no longer whether to secure your home, but what it really costs, item by item.
Seven years of Grimbergen figures, and a reversal in 2025
The federal police publish recorded offences municipality by municipality. For Grimbergen, the series does not show a steady decline, but an alternation.
| Year | Residential burglaries |
|---|---|
| 2019 | 240 |
| 2020 | 183 |
| 2021 | 175 |
| 2022 | 264 |
| 2023 | 204 |
| 2024 | 179 |
| 2025 | 198 |
The low point of 2021 (175 incidents) is not a lasting gain: the following year, the number rose to 264, above the 2019 level. The same movement was repeated on a smaller scale between 2024 and 2025, with a rise from 179 to 198. Over the period as a whole, Grimbergen remains 17.5 % below 2019, and a long way from its all-time high of 347 incidents reached in 2015. However, the municipality has never stayed below 175 incidents a year for long: the pressure is low, but not gone.
A second reading, the one that matters to a private individual: of the 229 burglaries in buildings recorded in Grimbergen in 2025, 86 % target a home. In Grimbergen, it is private homes that are burgled, not commercial premises. A household's security budget is therefore not a 'just in case' budget: it is the budget that matches the dominant risk in the municipality.
What Grimbergen's building stock means for the quote
Grimbergen is a residential municipality: single-family houses, detached or semi-detached, deep gardens, quiet housing estates bordered by fields and green areas. This layout has a direct impact on the composition of a system, and therefore on its price.
In a flat, the quote often comes down to one door and two windows. In a house in Grimbergen, the weak point is the back: living-room French windows, bay window, conservatory, kitchen or utility-room door leading out to the garden, not forgetting the garage and the adjoining shed. These access points share three flaws: they are glazed, they are invisible from the street, and the hedge or fence marking the garden boundary protects the intruder once they have got through.
In practical terms, this means that an honest quote for a house here includes more detection points than a quote for a flat, and cannot make do with a single motion detector in the hall. The approach that matches the local building stock is perimeter detection: detecting in the garden, before the glass is broken, and not once the intruder is already in the living room.
The real cost, item by item
An alarm budget is not just a purchase price. It breaks down into four distinct items, and it is the third and fourth that comparisons overlook.
1. The control panel. This is the item you cannot cut: it controls everything else and determines what the system will be able to do in five years' time. The choice depends on the number of devices supported, dual communication and the option of adding wired devices later. Our Ajax control panels and our comparison Hub 2 versus Hub 2 Plus set out the real differences between the models.
2. The peripherals, which vary with the number of access points. This is where the Grimbergen quote grows: every outside door, every bay window and every outbuilding adds a magnetic contact or a detector. Photo-verification detectors cost more than a simple detector, but avoid a needless trip home with every notification — they pay for themselves in journeys saved if you work in Brussels or Vilvoorde.
3. Outdoor signalling. An outdoor siren is the component with the most direct deterrent effect on a break-in in progress. It is also the one most often removed from the quote to bring the total down, wrongly.
4. The recurring cost — and it is not where you think. A monitoring subscription is in no way required for an alarm to work and alert you: it is the item that weighs most heavily in a budget over ten years. Our guide on the Ajax alarm without a subscription explains what you keep and what you lose without a contract. On the other hand, two recurring expenses are imposed by Belgian law: annual maintenance of the system and annual confirmation of the declaration.
For a single-family house in Grimbergen with several rear access points, equipment typically costs between €900 and €2,000, depending on the number of access points to be covered. The alarm kits cover the entry level; beyond three or four openings to protect, a configuration built piece by piece often works out cheaper than a kit that needs adding to. Our guide which Ajax alarm to choose in Belgium helps you frame this choice before requesting a quote.
No municipal grant in Grimbergen: what remains free
Let us be clear: no municipal security grant has been identified for Grimbergen. Part of the budget that other municipalities subsidise therefore remains entirely payable by the household, and it is better to know this before drawing up your financing plan rather than afterwards.
One resource nevertheless remains free, and it is largely under-used: the burglary prevention adviser — diefstalpreventieadviseur — provided by the police zone. Grimbergen comes under the Lokale Politie Grimbergen (5410). The visit is free, the adviser sells nothing, and the report prioritises the work: it is the most reliable way of not spending money in the wrong place. Ask for it before ordering equipment, not afterwards.
What Belgian law adds to the budget
Two distinct regimes, often confused, and both federal: they apply in the same way in Grimbergen as in Brussels or Liège.
For an alarm: declaration within ten days via police-on-web, annual confirmation, outdoor siren limited to three minutes, annual maintenance of the system and mandatory alarm verification before any police intervention. This framework stems from the Royal Decree of 25 April 2007; our article on the declaration of an alarm system in Belgium sets out the procedure.
For a camera: declaration on declarationcamera.be, a visible regulatory pictogram, a register of processing activities, and a ban on filming the public road or the neighbour's property. In a Grimbergen housing estate where gardens adjoin one another, this last restriction determines the mounting height and angle far more than the quality of the sensor. See our guide on the camera law in Belgium.
Frequently asked questions
How many burglaries were there in Grimbergen in 2025?
198 residential burglaries were recorded in Grimbergen in 2025, an increase of 10.6 % compared with the 179 incidents of 2024. Over six years, the municipality remains 17.5 % below 2019 (240 incidents). The average stands at 3.8 incidents per week.
Is there a municipal security grant in Grimbergen?
No municipal security grant has been identified for Grimbergen. However, the burglary prevention adviser of the local police zone remains available free of charge and can assess your home before you buy anything.
How much does an alarm for a house in Grimbergen cost?
The budget depends above all on the number of access points to protect, and a house with a garden has more of them than a flat. For a single-family house, equipment typically costs between €900 and €2,000, depending on the number of access points to be covered, excluding installation. The heaviest item over time remains an optional monitoring subscription, which is not compulsory.
Do you need to declare your alarm if you live in Grimbergen?
Yes, as everywhere in Belgium. The declaration must be made via police-on-web within ten days of installation and confirmed every year. This obligation is federal and stems from the Royal Decree of 25 April 2007: it depends neither on the municipality nor on the Region.
Who can give free burglary prevention advice in Grimbergen?
The burglary prevention adviser of the Lokale Politie Grimbergen (zone 5410). The visit is free, with no commercial interest whatsoever, and results in a report that prioritises the measures to take for your home.
Sources: Police crime statistics, Federal Police DGR/DRI/BIPOL, publication 2025_T04 (cut-off date 24/04/2026) — Grimbergen municipal fact sheet. Municipal support schemes change from one year to the next: check with the municipal administration before incurring any costs.