May 25, 2026 · 2 min read

Insulation cost per m2 Netherlands 2026 — price guide for isolatie

Q: When do insulation costs per m² increase significantly?

Factor Effect on cost --- --- Difficult access (steep roof, cramped crawl space) +20–40% Asbestos present (removal required before insulation) +50–200% extra (asbestos removal) Listed building or protected townscape +30–50% (specific materials, plann

Q: When is an architect required for insulation works?

- External wall insulation in protected townscape or listed building: architect handles planning permission and material advice - Major renovations where BENG requirements apply: architect prepares energy performance calculations - Combined roof exte

What are the average insulation costs per m² in the Netherlands in 2026? Overview of costs per m² for cavity wall, roof, floor and external wall insulation, including subsidies and when an architect is required.

Start your brief See pricing

Quick answer

Average insulation costs per m² in the Netherlands in 2026 range from € 20 to € 180/m² depending on the insulation type, thickness and application. With ISDE and SEEH subsidies, net costs are significantly lower. For external wall insulation that changes the appearance in a protected townscape, an architect is required.

Insulation costs per m² by type

| Insulation type | Cost per m² (incl. VAT) | Subsidy available | |---|---|---| | Cavity wall insulation (blown-in) | € 20–€ 50/m² façade | ISDE: €1,500–€4,500 per home | | Roof insulation (from inside) | € 30–€ 70/m² roof | ISDE: €1,500–€4,500 per home | | Roof insulation (from outside) | € 80–€ 160/m² roof | ISDE: €2,000–€6,000 per home | | Floor insulation (crawl space) | € 25–€ 55/m² floor | ISDE: €1,000–€3,000 per home | | External wall insulation | € 100–€ 180/m² façade | ISDE + municipal subsidy | | Internal wall insulation (partial) | € 30–€ 70/m² | No subsidy | | Attic floor insulation | € 20–€ 45/m² | ISDE available |

When do insulation costs per m² increase significantly?

| Factor | Effect on cost | |---|---| | Difficult access (steep roof, cramped crawl space) | +20–40% | | Asbestos present (removal required before insulation) | +50–200% extra (asbestos removal) | | Listed building or protected townscape | +30–50% (specific materials, planning permission) | | Combined renovation (insulation + façade + roof at once) | -10–20% (economies of scale) | | Premium insulation (PIR, PUR, aerogel) | +50–150% | | Post-2025: BENG requirements for major renovations | Architect costs mandatory |

When is an architect required for insulation works?

External wall insulation in protected townscape or listed building: architect handles planning permission and material advice
Major renovations where BENG requirements apply: architect prepares energy performance calculations
Combined roof extension or annex with insulation: architect for drawings and permit
VvE/apartment buildings: architect coordinates collective approach and permit process

ISDE subsidy 2026 — insulation

| Measure | Maximum ISDE compensation | |---|---| | Cavity wall insulation | Up to € 4,500 | | Roof insulation | Up to € 4,500 | | Floor insulation | Up to € 3,000 | | External wall insulation | Up to € 4,500 |

Combine multiple measures: the ISDE bonus for combinations can reach up to € 10,000.

Conclusion

Insulation costs per m² in the Netherlands range from € 20 to € 180/m² in 2026. With ISDE subsidies, net costs are considerably lower. For façade changes in protected areas or major renovations, an architect is required and ensures a cost-efficient, technically sound and permit-compliant result.

archi.sulerr.com handles the energy performance calculation, planning permission and full supervision of your insulation project.