Is the landlord obliged to insulate?
Yes, progressively. Each Belgian region is introducing minimum EPC standards for rental properties. The landlord is responsible for structural insulation (roof, walls, floors, windows) as part of the habitability obligation. The requirements and deadlines vary by region, with Flanders having the most advanced schedule.
The landlord’s obligation encompasses:
- Habitability standards: the property must be fit for human habitation, including adequate thermal comfort
- EPC requirements: each region is setting minimum energy performance levels for rental properties
- Structural insulation: roof, exterior walls, floors, and windows are the landlord’s responsibility
- Heating system: must be safe and functional
| Element | Landlord’s responsibility | Tenant’s responsibility |
|---|---|---|
| Roof insulation | Yes | No |
| Wall insulation | Yes | No |
| Window replacement | Yes | No |
| Heating system maintenance | Major repairs | Annual servicing |
| Draft proofing | Structural | Minor (seals, curtains) |
Minimum EPC requirements by region
Each region is gradually tightening EPC requirements for rental properties. Landlords must plan renovations ahead to meet upcoming deadlines. Non-compliance can result in fines and rental restrictions.
Overview of regional EPC schedules:
| Region | Current minimum | Future targets |
|---|---|---|
| Brussels | EPC E (since 2033 target: D) | Progressive tightening under RENOLUTION |
| Wallonia | Under development | Targets being set for 2030-2050 |
| Flanders | EPC E (since 2023) | EPC D by 2030, C by 2035, B by 2040 |
See the detailed pages for each region: Brussels, Flanders, Wallonia.
Failing to meet EPC requirements can result in the inability to rent out the property and administrative fines. Plan renovations well in advance of the deadlines.
Cost and financing of insulation
Insulation works can be significant investments:
- Roof insulation: 30-80 EUR/m2 depending on method
- Cavity wall insulation: 20-40 EUR/m2
- Exterior wall insulation (ETICS): 100-200 EUR/m2
- Window replacement (double/triple glazing): 300-800 EUR per window
Each region offers grants and incentives for renovation:
- Brussels: RENOLUTION premiums
- Wallonia: Walloon energy premiums
- Flanders: Mijn VerbouwPremie
Green renovation loans with favourable interest rates are also available through various Belgian banks.
Regional specificities
Brussels-Capital Region
The RENOLUTION programme sets progressive EPC targets for all buildings. Landlords must meet minimum standards by specific deadlines. Substantial premiums are available for insulation works.
Walloon Region
The Walloon housing code is developing EPC requirements for rental properties. Energy premiums and green loans are available for insulation works through the Walloon Region’s programmes.
Flemish Region
The Flemish Housing Rental Decree imposes the most advanced EPC schedule. Since 2023, rental properties must have minimum EPC label E, progressing to D by 2030 and ultimately A by 2050. The Mijn VerbouwPremie offers financial support.
Regional energy performance legislation. EU Energy Performance of Buildings Directive. Regional tenancy legislation (habitability standards).