peb RBC obligatoire · article
EPC certificate in the Brussels-Capital Region — obligations
The EPC certificate in the Brussels Region: obligations when selling or letting, impact on value, energy classes and COBRACE renovation requirements.
The Energy Performance of Buildings (EPC) certificate is a mandatory document in the Brussels-Capital Region for any sale or rental of a residential property. It assigns an energy class (A++ to G) that reflects the property’s primary energy consumption and is an increasingly decisive factor in property pricing. This guide details the obligations, the impact on value and the regulatory outlook.
EPC obligations in the Brussels Region
When is the EPC required?
The EPC certificate is required in the following situations:
- Sale of an existing residential property (house, flat, studio)
- Rental of a residential property (principal residence lease, student lease, short-term lease)
- Transfer of use of a property (including free of charge, in certain cases)
The certificate must be available from the publication of the listing. The listing itself must state the energy class and the specific consumption in kWh/m²/year. Failure to include the EPC in a listing is subject to an administrative fine.
Who issues the certificate?
The EPC certificate is produced by an EPC certifier accredited by Bruxelles Environnement. The certifier visits the property, records the characteristics of the thermal envelope (insulation, glazing, airtightness), the heating system, ventilation and hot water production, then enters this data into the official software, which calculates the energy performance.
Validity period
The EPC certificate is valid for 10 years. If energy improvement works are carried out (replacement of the heating system, roof insulation, new glazing), a new certificate is recommended to reflect the improvements and potentially achieve a better class.
Energy classes
The EPC certificate assigns a class from A++ (most efficient) to G (least efficient):
| Class | Consumption (kWh/m²/year) | Description |
|---|---|---|
| A++ | ≤ 0 | Net-positive energy building (exceptional) |
| A+ | 0 – 15 | Passive or near-passive |
| A | 15 – 45 | Very low energy |
| B | 45 – 95 | Low energy |
| C | 95 – 150 | Adequate performance (current renovated standard) |
| D | 150 – 210 | Average performance |
| E | 210 – 275 | Poor performance (typical unrenovated older stock) |
| F | 275 – 345 | Very poor performance |
| G | > 345 | Energy sink |
In Brussels, the majority of the existing residential stock falls within classes D to G, due to the age of the building stock (more than 50% of dwellings date from before 1945) and the historical lag in thermal insulation.
The impact of the EPC on property value
A now central pricing factor
The EPC has moved from a mere administrative formality to a decisive pricing factor. Buyers systematically factor the cost of energy upgrades into their calculations. Market data shows significant price gaps:
- A flat rated EPC A–B sells on average 10 to 20% more than a comparable property rated E–F in the same commune
- A house rated G suffers a discount of 15 to 25% compared with a house rated C, the gap reflecting the anticipated cost of energy renovation works
Impact on the rental market
In the Brussels Region, the EPC also influences the rental market:
- Tenants are increasingly sensitive to energy costs (a property rated EPC G can cost €150 to €300 more per month in energy than an EPC C property)
- Since 2025, the right to index rent is restricted or suspended for the most energy-intensive properties (classes F and G), reducing yields for landlord investors
The COBRACE ordinance and renovation obligations
The framework
The COBRACE ordinance (Brussels Code on Air, Climate and Energy Management) sets a phased renovation schedule for the Brussels building stock. The regional objective is to achieve carbon neutrality by 2050, which requires a massive improvement in the energy performance of existing buildings.
Obligations for owners
Owners of poorly rated properties will progressively be required to carry out energy renovation works. The precise timetable and targets are set out in regional decrees currently being finalised, but the direction is clear: properties rated F and G will need to reach at least class E by 2030–2033, then progress towards class C or better by 2040–2050.
The cost of upgrading
Typical energy renovation works and their indicative costs:
- Roof insulation: €30 to €60/m² (often the first investment, and the most cost-effective)
- Wall insulation (internal or external): €80 to €200/m² of facade
- Window replacement (double or triple glazing): €500 to €1,000/m² of opening
- Heating system replacement (condensing gas boiler or heat pump): €5,000 to €20,000
- Mechanical ventilation system: €3,000 to €8,000
For a typical Brussels terraced house (150 m²), moving from G to C may represent an investment of €50,000 to €100,000.
EPC and property transactions: key considerations
For the seller
A good EPC rating accelerates the sale and supports the price. If your property is poorly rated, two strategies are available:
- Renovate before selling: upfront investment that translates into a higher sale price
- Sell as-is with an EPC discount: the cost of works is factored into the buyer’s negotiation
In both cases, a property estimation quantifies the impact of the EPC on your property’s value and helps you choose the most advantageous strategy.
For the buyer
The EPC is a legitimate negotiating lever. A property rated F or G offers greater room for negotiation, but the buyer must precisely costing the renovation before making an offer. Reviewing the full EPC report (not just the class) identifies the priority areas for improvement.
Our EPC services
Our practice offers a diagnostic and EPC certificate service for your transactions. In addition, our property estimation service incorporates the impact of the EPC into the valuation of your property.
Contact us to obtain an EPC certificate or to assess the energy impact on the value of your Brussels property.