Mandatory diagnostics for letting in Belgium
What are the mandatory diagnostics for letting a property in Belgium? EPC, electricity, safety: summary by Region and checklist.
The common base of the three Regions
Three diagnostics are mandatory throughout Belgium before letting:
| Diagnostic | Validity | Average cost | Annexed to lease |
|---|---|---|---|
| EPC certificate | 10 years | EUR 250 | Yes |
| Electrical compliance | 25 years | EUR 250 | Yes |
| Smoke detectors | 10 years (detector) | EUR 50 | Mentioned in the property inventory |
These three elements constitute the absolute minimum. A landlord who lets without an EPC or electrical certificate faces cumulative fines of up to EUR 50,000.
The EPC certificate is the most strategic: it determines the right to index the rent and even the right to let in the Regions that impose minimum scores.
Regional specificities
Brussels
- Brussels tenant guide (to be annexed to the lease)
- CO detector strongly recommended
- Housing condition inventory (regional annex)
Wallonia
- Rental permit for dwellings under 28 sqm and collective housing (valid for 5 years)
- CO detector mandatory if combustion appliance present
- Regional annex to the lease
Flanders
- Asbestos certificate mandatory (properties built before 2001)
- Woningpas (digital housing passport)
- Conformiteitsattest (housing compliance certificate) in certain municipalities
- Flemish annex to the lease (Vlaamse bijlage)
These specificities are in addition to the common base. A landlord owning properties in several Regions must master the requirements of each Region.
Documents to provide to the tenant
At the signing of the lease, the landlord must provide:
| Document | Mandatory | Note |
|---|---|---|
| Signed lease | Yes | Minimum 2 copies |
| EPC certificate | Yes | Copy |
| Electrical compliance report | Yes | Copy |
| Regional annex | Yes | Brussels, Wallonia or Flanders |
| Property inventory | Yes | To be carried out jointly |
| Tenant guide | Yes (Brussels) | Downloadable |
| Co-ownership regulations | Yes (if co-ownership) | Relevant excerpts |
| Asbestos certificate | Yes (Flanders, if applicable) | Copy |
The absence of any of these documents can be invoked by the tenant in case of a dispute. An online lease via LeaseBelgium automatically generates the required regional annexes.
Practical summary
The golden rule: all diagnostics must be ready before publishing the listing. The EPC must appear in the listing (legal obligation), and all other documents must be available during viewings.
| Timing | Action |
|---|---|
| D-30 | Order EPC + electrical compliance |
| D-21 | Order asbestos certificate (Flanders) |
| D-14 | Install smoke and CO detectors |
| D-7 | Verify receipt of all certificates |
| D | Publish the listing with the EPC score |
For the complete letting checklist (beyond diagnostics), see our letting checklist.
A rental management software centralises all your diagnostics, alerts you on validity deadlines and generates the mandatory annexes.
Frequently asked questions
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The EPC certificate, electrical compliance inspection and smoke detectors are mandatory in all three Belgian Regions. This common base applies to all types of residential leases.
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Yes. An estate agency can coordinate the diagnostics on behalf of the landlord. The cost is generally charged in addition to the letting fees.
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The EPC and electrical report remain valid (10 and 25 years). The electrical inspection must be repeated with each change of tenant for installations prior to 1981. The property inventory must be done systematically each time.