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Cavity wall insulation cost Netherlands 2026 — price per m² including labour
Current overview of cavity wall insulation costs in the Netherlands 2026. What does cavity wall insulation cost per m² including labour, which methods are available and when is subsidy possible? With cost tables.
Quick answer
Cavity wall insulation costs in the Netherlands in 2026 average € 15 to € 30 per m² including labour depending on the method and accessibility. For a typical terraced house (60–80 m² of facade area) total costs of € 1,000–€ 2,200 are realistic.
Cavity wall insulation costs by method
1. Price per m² including labour
| Method | Cost per m² (incl. VAT + labour) | |---|---| | EPS beads (polystyrene granules) | € 15–€ 22/m² | | Mineral wool (rock wool injection) | € 18–€ 28/m² | | PUR foam (polyurethane) | € 20–€ 35/m² | | Perlite granulate | € 16–€ 25/m² |
2. Total costs by house type
| House type | Facade area | Estimated total cost | |---|---|---| | Mid-terrace | 40–60 m² | € 700–€ 1,500 | | End-terrace / semi-detached | 70–100 m² | € 1,200–€ 2,500 | | Detached house | 120–180 m² | € 2,000–€ 4,500 |
3. Additional costs
| Item | Cost | |---|---| | Inspection and drilling | € 100–€ 250 | | Rendering repair after drilling | € 5–€ 15/m² | | Endoscope survey | € 150–€ 300 |
ISDE subsidy for cavity wall insulation 2026
Cavity wall insulation qualifies for the Dutch ISDE subsidy (Investment Subsidy Sustainable Energy):
- Subsidy: € 8–€ 14 per m² (depending on house type and Rc-value achieved)
- Apply via RVO.nl after installation (not in advance)
- Certified installer required (KOMO or BRL 2202 certification)
- Can be combined with an Energiebespaarlening (Energy Saving Loan via Warmtefonds)
Tips for cavity wall insulation
- Check cavity width first — minimum 50 mm needed for EPS beads; narrower cavities need mineral wool
- Choose a certified contractor — only KOMO/BRL-certified installers qualify for ISDE subsidy
- Get three quotes — price differences between companies can be 30–40%
- Request a before-and-after measurement — required for ISDE and useful for energy label improvement
- Combine with other measures — insulation + triple glazing + solar panels delivers higher ISDE and faster payback
Permit for cavity wall insulation
Cavity wall insulation: no permit required (inner leaf of cavity wall is not structurally altered).
Exception: listed building or protected townscape → always check with your municipality.
Conclusion
Cavity wall insulation costs in the Netherlands average € 15–€ 30 per m² including labour. With ISDE subsidy the net investment falls significantly. For cavity wall insulation as part of a broader home renovation, a coordinated project brief saves time and cost.
archi.sulerr.com offers an AI-assisted briefing service from € 399 — including a structured project brief, cost estimate and scope for your architect or contractor.