ISDE subsidy 2026
up to 30% back
A fixed amount per m² via RVO. With two or more insulation measures within 24 months the amount doubles. We provide the ISDE-ready invoice and can file the application for you.
Get up to 30% of your insulation costs back
ISDE pays a fixed amount per m². One measure = base rate. Two or more measures within 24 months — for example roof and floor — doubles the amount for both. Biobased materials can add a bonus.
We handle it for you: we supply the specified invoice with RVO product codes, Rd values and areas, and can submit the application to RVO on your behalf.
ISDE rates 2026
| Measure | 1 measure | 2+ measures | Bio bonus |
|---|---|---|---|
| External wall insulation | € 20.25 | € 40.50 | + € 6.00 |
| Roof insulation | € 16.25 | € 32.50 | + € 5.00 |
| Floor insulation | € 5.50 | € 11.00 | + € 2.00 |
| Cavity wall insulation | € 5.25 | € 10.50 | + € 1.50 |
| Attic floor insulation | € 4.00 | € 8.00 | + € 1.50 |
| Ground insulation | € 3.00 | € 6.00 | + € 1.00 |
Amounts per m², ISDE 2026. Minimum area: 10 m² for cavity and façade, 20 m² for other measures. Apply within 24 months after completion. Current conditions: rvo.nl. Soundproofing and waterproofing are not covered by ISDE.
What to watch for
- ✓ Insulation must meet the Rd requirement (usually Rd ≥ 3.5 m²K/W; cavity Rd 1.1).
- ✓ Invoice with product codes, Rd values and area in m².
- ✓ Application within 24 months after handover.
- ✓ Two or more measures within 24 months = doubled rates.
- ✓ Biobased materials may unlock an extra bonus.
Want to know how much subsidy you get back?
After a free survey you get a fixed price per m² including the expected ISDE amount. We can handle the full application for you.
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