Efficiency House 40 EE vs. QNG: What provides more subsidy?
"40 EE" and "QNG" are often confused but mean different things: The EE class stands for a high share of renewable energy, the QNG seal for verified sustainability of the entire building. This guide differentiates both paths, shows which subsidy stage they open and classifies the additional costs — Stand 2026, with sources.
"40 EE" and "QNG" sound similar but mean different things: The EE Class stands for a high share of renewable energy, the QNG Seal for verified sustainability of the entire building. Which path opens more subsidy depends on the program. This guide differentiates both — numbers first, Stand 2026.
Short answer: The EE class requires a renewable share of at least 65 % of the heat/energy supply (e.g. heat pump + PV). The QNG seal („Quality Seal Sustainable Building") additionally assesses life cycle assessment, pollutants and construction costs over the life cycle — verified by a certification body. For the highest new construction subsidy (e.g. „Climate-Friendly New Build – with QNG", WEF 300 with QNG) the seal is a prerequisite; the EE class alone is not sufficient.
What does „40 EE" mean and what does „QNG"?
Both are based on the Efficiency House 40 but address different aspects. The EE class is an energy-related additional level: At least 65 % of the required energy must come from renewable sources — typically via a heat pump, often supplemented by photovoltaics. The QNG seal goes further and looks at the building holistically: embodied energy in the building materials, life cycle assessment, freedom from pollutants, deconstructability and the construction costs. It is verified and awarded by an accredited body.
40 EE vs. QNG — Differentiation (Stand 2026)
| Criterion | Efficiency House 40 EE | Efficiency House 40 with QNG |
|---|---|---|
| Focus | renewable energy supply | Sustainability of the entire building |
| Core condition | ≥ 65 % renewable energy | verified life cycle assessment + QNG criteria |
| Verification | Energy efficiency expert | additionally certification body |
| Effort/docu | moderate | high (life cycle evidence) |
| Opens subsidy level | EH-40 basis | highest new build level (with QNG) |
What provides more subsidy?
Short answer: For the highest maximum loan amounts — for example at „Home Ownership for Families" (WEF 300) with QNG — there is no way around the QNG seal. The EE class alone supports the EH-40 verification but does not raise it to the QNG level. Those seeking maximum subsidy should plan for QNG from the outset.
This becomes concrete in the maximum loan amounts: With QNG they are higher than with pure EH 40. The difference between the levels and the appropriate loans is listed in the program overview. Whether the additional effort is worth it for your project is explained in Is KfW 40 worthwhile? .
Impact on the subsidy (orientation, Stand 2026, kfw.de)
| Path | Subsidy advantage | Prerequisite |
|---|---|---|
| EH 40 | Basic subsidy loan | Primary energy ≤ 40 % |
| EH 40 EE | as EH 40, EE share fulfilled | ≥ 65 % renewable energy |
| EH 40 with QNG | higher maximum loan amounts | QNG seal through certification |
Where do the additional costs arise?
The EE class causes hardly any additional costs if a heat pump and PV are planned in any case — both count towards the 65% share. The QNG seal on the other hand costs extra: for the certification itself, the increased planning and documentation effort and in part for more ecologically demanding building materials. The additional costs are project-specific; as a rough guide they move in the low single-digit percentage range of the construction sum.
Calculate additional costs versus subsidy advantage
QNG is worthwhile if the higher maximum loan amount and the interest advantage outweigh the certification and construction costs. This is an individual calculation — have it reviewed by the energy efficiency expert and your bank (Stand 2026).
Which path fits your project?
If you primarily want to achieve the EH-40 standard and are planning a heat pump plus PV anyway, the EE class is usually met without any significant additional effort. If you are aiming for the highest subsidy level — for example as a family through WEF 300 — QNG is the key, but with noticeable additional effort. The energy target values that apply in both cases are listed in the EH-40 requirements; the path to proof of the subsidy process.
Efficiency standard according to manufacturer
Neither „40 EE" nor „QNG" result from the data sheet. Only the verification of the energy efficiency expert (EE class) or the certification (QNG) makes the level reliable.
Frequently asked questions
Is „40 EE" the same as „40 Plus"? No. „40 Plus" was an older term with its own additional requirements (among other things battery storage). „40 EE" focuses on the 65% share of renewable energy.
Do I need the EE class for QNG? QNG builds on the EH-40 standard and requires a renewable, efficient supply; the EE requirement is therefore usually already fulfilled in practice.
Does QNG always unlock more money? QNG opens higher maximum loan amounts but is associated with certification and construction costs. The net benefit depends on the individual case (Stand 2026, kfw.de).
Who issues the QNG seal? An accredited certification body based on the QNG criteria; the energy aspect is supported by the energy efficiency expert.
Can I get QNG afterwards? Hardly makes sense — QNG requires documentation throughout the entire construction process (materials, life cycle assessment). It must be planned from the beginning.
Sources: Quality Seal Sustainable Building (QNG), Federal Ministry of Housing, Urban Development and Building Affairs; KfW program conditions „Climate-Friendly New Build" and WEF 300, Stand 2026, kfw.de; Building Energy Act (GEG), version 2026. Values are for guidance.
EH 40, 40 EE or QNG — plan appropriately
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Compare house prices nowImportant Questions Briefly Explained
The most common price questions regarding Efficiency House 40 EE vs. QNG - compactly answered by the editorial team of kfw40fertighaus.de (Stand 2026).
