ISDE 2026 is not a detail change. It changes the approach.
From 2026 onwards, Dutch sustainability policy takes a clear turn.
Ventilation measures will become eligible for subsidy, but only when combined with insulation.
This means that isolated, single-measure upgrades are no longer sufficient.
Whole-home and area-based planning becomes the new standard.
What is ISDE?
ISDE stands for Investment Subsidy for Sustainable Energy and Energy Saving (Investeringssubsidie Duurzame Energie en Energiebesparing).
It is a national Dutch subsidy scheme that supports homeowners, housing corporations, and organizations in making buildings more energy-efficient through measures such as insulation, heat pumps, and renewable energy systems.
From 2026, ISDE explicitly pushes towards integrated upgrades instead of individual interventions.
What changes under the new ISDE rules?
From 2026, the subsidy framework introduces three key shifts:
📄 Subsidy for energy-efficient ventilation
🔗 Only when combined with insulation measures
🏘️ Focus shifts to complete home upgrades
This aligns ISDE with broader European policy goals and accelerates the transition toward healthier, better-performing homes.
Without insight, subsidy becomes a risk
Many retrofit programs currently lack clear overview of:
📍 Where insulation has already been applied
🌬️ Which homes still require ventilation upgrades
🧮 Which combinations are actually subsidy-eligible
The result?
⏳ Delays in execution
💸 Missed subsidy opportunities
🧩 Fragmented implementation across neighborhoods
Without data-driven insight, ISDE becomes harder to manage instead of easier to apply.
From individual measures to area-based control
With Duurzaamheidskaart, organizations gain area-level insight into:
🧱 Insulation levels per home and neighborhood
🌬️ Ventilation potential per building
🧮 Logical, subsidy-ready combinations
🚀 Where to start for maximum impact
This enables steering on impact and compliance, instead of assumptions.
ISDE 2026 requires direction, not reactive policy
ISDE 2026 is closer than it seems.
Organizations that wait will lose time, budget, and momentum.
Those who prepare now can turn subsidy rules into strategic advantage.
👉 Discover what Duurzaamheidskaart can do for your organization
👉 duurzaamheidskaart.nl
