Yes, significantly. In Wallonia a poor PEB rating (F or G) lowers a property’s value and buyer demand, while a good rating (A to C) supports the price. The energy label is a core valuation criterion, not a formality, and a valid PEB is mandatory to sell, rent or advertise.
The PEB certificate (Energy Performance Certificate) has moved from paperwork to price driver. Buyers now read the energy label as a proxy for future bills and looming renovation costs, so it feeds straight into what they will offer. A well-insulated home with a strong rating attracts more interest and holds its price; a draughty F or G home draws fewer buyers and sharper negotiation.
The rules give the label real teeth in Wallonia. A valid PEB is mandatory to sell, to rent and even to advertise, and it lasts ten years. On the rental side the pressure is explicit: Wallonia limits or blocks rent indexation for poorly rated F and G dwellings, and a valid PEB must be annexed to every lease. That regulatory drag on income reaches back into sale value, because an investor prices in the rent they can actually charge and index.
The counter-intuitive twist is that the certificate can be worth commissioning renovation for. Insulation, glazing or heating upgrades that lift the rating can add more to the sale price than they cost, especially at the weak end of the scale where the discount for a G is steepest. That is a calculation an on-site agent can help you run.
Because the label matters this much, bring your PEB to the valuation. If it is poor, the agent can tell you whether improving it before selling is likely to pay.
At a glance
| PEB rating | Typical effect on valuation |
|---|---|
| A to C (strong) | Supports price, wider buyer demand |
| D to E (average) | Neutral, priced on other factors |
| F to G (weak) | Lowers value, fewer buyers, harder negotiation |
| Legal status | Mandatory to sell, rent and advertise in Wallonia |
| Validity | 10 years |
| Rental note | F and G face limited or blocked rent indexation |