Countries · Belgium
What to check in Belgium before you sign.
You pay twice here: first the highest one-off purchase costs in western Europe, then the compulsory refurbishment, because a large part of the stock is in poor energy condition.
What costs the most money in Belgium
A flat with the poor energy label F still cost €244,012 on average in 2024, a year later only €203,488. That is a loss of around 17 percent in a single year. Over the same period, flats with label A rose from €335,611 to €346,287. The label is no footnote here, it is the price.
Source: Notarisbarometer T4 2025, Fednot
Purchase costs
4 to 15%
of the purchase price, on top of the price in the listing.
- Flanders, sole own home2%
- Flanders, general12 %
- Wallonia, sole own home3 %
- Wallonia and Brussels, general12,5 %
- Brussels, first €200,000 exemptup to €25,000 savings
- New build, instead of transfer tax21% VAT
Source: Vlaamse Belastingdienst, Statbel and the Brussels-Capital Region, as at 2025 and 2026. Flanders and Wallonia cut the rates for a sole own home sharply on 1 January 2025. The overall ranges are calculated from the individual items; they are not an officially published figure.
The trap for tenants
Indexing the rent does not happen by itself. It requires a registered tenancy agreement, has to be requested in writing and takes effect no more than three months back. In Brussels the landlord may only index at all if a valid energy certificate exists. For classes E, F and G, that is only at a reduced rate.
Energy and the duty to renovate
In Flanders a missing valid energy certificate costs between €500 and €5,000, and paying does not remove the duty. Since 1 January 2023 there is more. Anyone acquiring a building in class E or F has to bring it to at least class D within six years. Failing that costs €500 to €5,000.
The further tightening originally planned was dropped; class D stands.
Source: Vlaams Energie- en Klimaatagentschap, 2026
Certificate validity: 10 years
What to watch for in Belgium in particular
In Flanders every transfer of land needs a soil certificate, even for an unsuspicious plot. On top of that come hard disclosure duties on planning: whether a building permit was granted, and whether proceedings over a building breach are running. It must also be disclosed whether a judgment has been handed down.
Where these statements are missing, courts treat the preliminary contract as void.
Source: OVAM and Flemish Spatial Planning Code, Articles 5.2.1 to 5.2.6
Official maps in Belgium
7 map layers lie directly over your property.
Not as an average for the district, but at your exact address, with a legend and a visible source. Every layer can be switched on separately.
Check it yourself
The official bodies in Belgium.
These bodies are grouped by category: property and encumbrances, energy, natural hazards and more. The report on your property names the responsible bodies, with the date checked and a link. A figure you cannot verify is not a figure, it is a claim.
over 100
official data sources
4
categories
What this costs
minus 17%
is what a flat with the poor energy label F lost in value within one year, from 244,012 to 203,488 euros. Flats with label A gained over the same period.
Source: Notary barometer Q4 2025 of the Federation of Belgian Notaries
19.7%
of all households were at risk of energy poverty in 2024. On top of that come the highest one-off purchase costs in western Europe.
Source: FOD Economie, the Belgian economy ministry, published 4 November 2025
These numbers arise after the signature. The report does the maths before it.
The market in Belgium
The average price for a house was €346,218 in 2025 and €275,862 for a flat. The number of sales rose by around 15 percent in the first nine months of 2025 against the year before.
Source: Fednot, Vastgoedbarometer 2025
A real dossier from this country
See what the analysis found on an actual listing in Belgium — every figure with its source.
Open the example dossierOther countries