The pivotal date
A single year separates the buildings concerned from the others. The date of construction governs the identification obligation.
The use of asbestos was prohibited in Belgium from 2001, production having ceased earlier but stocks having been used until then.
That date is the reference for the obligations. Buildings whose year of construction predates 2001 are covered; others are not.
A useful qualification in renovation: where an earlier building includes an extension or annexe post-dating that year, that part is excluded from the check and deemed asbestos-free.
What differs between regions
The gap is significant and shapes project preparation. Identification precedes the consultation of firms.
| Region | Obligation on transfer |
|---|---|
| Flanders | certificate required since November 2022 |
| Wallonia | no obligation to date |
| Brussels | no obligation to date |
In Flanders the certificate is required on sale, gift or contribution to a company of a building predating 2001.
It must be available before the preliminary agreement is signed, or at the moment of transfer where there is none, which makes it a practical condition of the notarial transaction.
It is issued by a certified expert registered with the competent regional body, which delivers the certificate, and it is valid for ten years.
In Wallonia and Brussels no obligation exists to date, but changes are being considered and announced.
The essential difference
This is the point this guide wishes to emphasise, because it is regularly misunderstood. Identification does not remove the need for vigilance during the works.
The sale certificate is a non-destructive inventory. The expert looks for visible and accessible asbestos; they do not look inside walls.
It therefore does not suffice before works. A complementary destructive investigation is needed to identify asbestos enclosed within build-ups, precisely where a renovation will intervene.
Two documents, two purposes: one informs a purchaser about a condition, the other prepares intervention on walls that will be opened.
Moreover, firms working with employees fall under welfare-at-work rules, which impose their own inventory, independently of regional transaction obligations.
What it changes for the project
Four effects, all to be anticipated rather than endured. They bear on cost, calendar and participants.
The programme. Removal falls to approved firms, with their own procedures and lead times.
The budget. Treatment costs bear no relation to ordinary strip-out, and this also concerns disposal, covered in the article on measurement in renovation.
The method. Some areas become inaccessible during removal, which constrains the sequence of other trades.
Liability. Working without survey on an at-risk building exposes both contractor and client.
The deadlines announced
Two developments going beyond sale, concerning all Flemish owners. They extend the obligations of identification and management.
Associations of co-owners will have to hold a separate certificate for common parts of buildings predating 2001, by an announced deadline.
In time, every owner of a building predating 2001 will have to hold a certificate, even without a sale, under a policy targeting a safe building stock on a horizon of around twenty years.
Those deadlines are followed in the article on developments to monitor.
What this means for a professional
Four rules.
Check the year of construction before anything else, the pivotal date governing all obligations.
Do not rely on a sale certificate before works, it being non-destructive by nature.
Budget for the complementary survey within design fees, rather than discovering it mid-project.
Anticipate the announced deadlines for Flemish property, a document required in time being obtainable now.
This article reflects the position of the rules at the date of checking and serves professional orientation. It does not replace technical advice or consultation of the applicable texts.