Lower operational energy demand
A coordinated envelope and efficient systems can reduce heating and cooling needs. Renewable energy complements an appropriate building concept.
What sustainable building can achieve.Benefits for everyday life.
In Germany, sustainable building combines environmental quality with long-term usability. The benefits achieved depend on the location, design, construction and operation of each project.
Use resources carefully
Renovation, adaptive reuse and considered material choices can limit demand for new resources. The right solution is assessed building by building.
More comfortable homes
Daylight, indoor air, acoustics and protection from summer heat form part of holistic design. They support comfort and the quality of everyday use.
Stay useful for longer
Adaptable layouts, accessible services and maintainable components help buildings respond to changing needs.
Make quality transparent
DGNB and QNG provide structured requirements and evidence. They make intended quality assessable; certification must be demonstrated separately.
Explore support early
KfW programmes can support climate-friendly projects. Current conditions, the required evidence and application timing determine eligibility.
Good buildings look ahead.Beyond the present.
Sustainable construction starts with the right questions. What can we preserve? What use suits this place? How can we use energy and materials more thoughtfully? NEOKEEN brings together development, new construction and renovation. Together with project partners, we consider a building beyond completion: in everyday use, through changing needs and towards its future reuse.
Rethink existing buildings
Assess existing structures, identify opportunities and give established spaces a new purpose.
Reduce demand thoughtfully
Plan the envelope, building systems and use together to limit operational energy demand.
Consider the whole life cycle
Bring materials, maintenance, adaptability and eventual dismantling into the design from the outset.
Knowledge connects us.
NEOKEEN is a member of the German Sustainable Building Council, DGNB e. V. Membership supports professional exchange. It does not replace certification of an individual building.
Tax possibilities in Germany.
Different tax provisions may be relevant depending on the intended use and project. Statutory requirements and the individual tax situation are decisive.
Declining-balance depreciationNew residential buildings generating income
Section 7(5a) EStG permits annual depreciation of 5% of the remaining value for eligible new residential buildings. The relevant construction-start or purchase-contract window is 1 October 2023 to 30 September 2029. An acquisition must take place no later than the end of the year of completion.
Legal basis ↗Special depreciation for new rental homesNew homes let for payment
Section 7b EStG provides up to 5% annual special depreciation, in addition to building depreciation, in the acquisition or construction year and the following three years. The current eligibility window requires, among other conditions, EH 40 NH with QNG, cost and assessment limits, and ten years of paid residential letting. In the current eligibility window, the building application or building notice must fall between 1 January 2023 and 30 September 2029.
Legal basis ↗Energy improvements to an owner-occupied homeExisting homes used by their owners
Section 35c EStG may allow a 20% tax reduction over three years for eligible energy improvements to owner-occupied buildings more than ten years old. A specialist-contractor certificate and statutory evidence are required. The same measure cannot receive publicly subsidised interest-rate loans or grants. Statutory caps apply. The same expenditure cannot also receive another tax deduction or relief.
Legal basis ↗General information as of 28 October 2026. Please review project-specific conditions and combinations with a tax adviser.
Understanding sustainability.
What does sustainable building mean to NEOKEEN?
We consider energy, materials, use and the life cycle together. Appropriate measures are developed for the specific circumstances of each project.
Is renovation always the more sustainable option?
Preservation and reuse can conserve resources. Whether renovation, extension or new construction is more appropriate depends on the structure, use, energy demand and life-cycle assessment.
Are all the projects shown DGNB- or QNG-certified?
No. NEOKEEN’s DGNB membership is separate from building certification. Project standards and any certification status must be established through the relevant project evidence.
Is support available for sustainable building in Germany?
Depending on the project, funding programmes and tax provisions may apply. Conditions, timing and possible combinations should be checked before making binding plans.
Technical references · As of 28 October 2026
- NEOKEEN · Unternehmensauftritt
- NEOKEEN · ESG und DGNB
- NEOKEEN · Service Development
- Umweltbundesamt · Neubau – energieeffizient und ökologisch
- Umweltbundesamt · Umwelt und Klima schützen – Wohnraum schaffen – Lebensqualität verbessern
- DGNB · Zertifizierung für Gebäude
- QNG · Allgemeine Anforderungen
- KfW · Klimafreundlicher Neubau – Wohngebäude (297, 298)
- EStG § 7 · Absetzung für Abnutzung oder Substanzverringerung
- EStG § 7b · Sonderabschreibung für Mietwohnungsneubau
- EStG § 35c · Energetische Maßnahmen bei zu eigenen Wohnzwecken genutzten Gebäuden
What would you like to rethink?
A plot, an existing building or a specific project idea: let us explore the possibilities together.