Calculating the reference rent using the Brussels indicative rent grid
The Brussels indicative rent grid is a free online tool developed by the Rent Observatory of the Brussels-Capital Region. Accessible via the logement.brussels portal, it allows any landlord or tenant to calculate the reference rent for a property based on objective and measurable criteria: location, floor area, number of bedrooms, EPC rating, condition of the property and available facilities.
The underlying statistical model draws on data from thousands of Brussels lease agreements, regularly updated. It produces a median reference rent, accompanied by a lower range (property in average condition) and upper range (property in excellent condition). The grid remains indicative and non-binding, but it constitutes the primary benchmark used by Brussels justices of the peace in case of a rent dispute. For landlords, setting a rent within the grid’s range significantly reduces the risk of litigation.
Steps for calculating rent with the grid
The reference rent calculation is done online, by progressively entering the property’s characteristics:
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Property location: enter the exact address or select the municipality and neighbourhood. The grid segments Brussels into geographical zones corresponding to market price levels.
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Type of property: apartment, house, studio. Each category has its own calculation model.
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Habitable floor area: the surface area in m2 of habitable rooms (excluding cellars, unconverted attics, terraces). This is one of the most determining criteria.
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Number of bedrooms: a separate room that can serve as a bedroom (minimum 9 m2).
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Floor level: for apartments, the floor influences the rent (ground floor is cheaper, upper floors are more expensive).
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Condition of the property: the tool generally offers a scale (recently renovated, good condition, average condition, in need of renovation).
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Facilities: presence of a fitted kitchen, bathroom with shower and/or bathtub, terrace, garden, cellar, parking.
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EPC: the letter of the Energy Performance Certificate (A to G). This criterion has a significant impact on the reference rent.
Result obtained:
| Data | Meaning |
|---|---|
| Median reference rent | ”Normal” rent for this type of property in this neighbourhood |
| Lower range | Reasonable minimum rent (e.g. property in average condition) |
| Upper range | Reasonable maximum rent (e.g. property in excellent condition) |
Weight of different criteria in the calculation
Not all criteria have the same impact on the reference rent. Here is their relative importance:
| Criterion | Impact on rent | Example of difference |
|---|---|---|
| Location (neighbourhood) | Very high | +30 to 50% between affordable and expensive municipalities |
| Floor area | High | +10 to 15 EUR/additional m2 |
| Number of bedrooms | High | +100 to 200 EUR per bedroom |
| EPC | Medium to high | +50 to 150 EUR between EPC E and EPC A |
| Condition of property | Medium | +10 to 20% for a renovated property |
| Floor level | Low to medium | +5 to 10% per floor (up to the 5th) |
| Facilities | Low | +30 to 80 EUR for a fitted kitchen |
Indicative calculation examples:
- 2-bedroom apartment, 75 m2, EPC C, Ixelles, good condition: reference rent around 1,000-1,150 EUR
- Studio 30 m2, EPC D, Anderlecht, average condition: reference rent around 500-600 EUR
- 1-bedroom apartment, 55 m2, EPC B, Etterbeek, renovated: reference rent around 800-950 EUR
These figures are indicative and depend on the grid’s updated data. Consult the online tool directly for an accurate calculation based on the latest rental market data.
Interpreting the result and taking action
The reference rent obtained should be interpreted with nuance:
If your rent is within the range: The rent is in line with the market. No particular action is necessary.
If your rent is above the upper range:
- For the landlord: this does not mean the rent is illegal, but it could be challenged by the tenant. Make sure you can justify the rent through exceptional characteristics (luxury renovation, premium location, non-standard facilities).
- For the tenant: you can invoke the grid before the justice of the peace to request a rent reduction, within 6 months of moving in.
If your rent is below the lower range:
- For the landlord: you could consider a rent revision at the end of the current three-year period, if the undervaluation exceeds 20% of the normal rental value.
- For the tenant: you benefit from a favourable rent. The annual indexation will apply normally.
The grid is a decision-support tool, not a mandatory schedule. Its value lies in its ability to objectify discussions between landlord and tenant and to provide a benchmark for the judge in case of dispute. For charges, consult our guide on rental charges.