Introduction
The building sector is responsible for a significant share of CO2 emissions in Germany. Energy renovation of existing buildings is therefore a central pillar of climate policy. For homeowners' associations (HOAs, German: Wohnungseigentümergemeinschaften/WEGs), this presents particular challenges: heterogeneous owner interests, limited reserves, and complex decision-making processes complicate implementation. Professional HOA management plays a key role in navigating these challenges. This article examines the current situation and identifies options for action.
Legal Framework
Building Energy Act (GEG -- Gebaudeenergiegesetz)
The Building Energy Act (GEG) contains requirements for the energy efficiency of buildings. For existing buildings, the following are particularly relevant:
The 65-percent rule for renewable energy in new heating systems takes effect gradually from 2026 and 2028 respectively.
HOA Law (WEG-Recht)
Since the WEG Reform of 2020, structural modifications can be approved by simple majority. Costs are generally borne only by the consenting owners -- unless the measure amortizes within a reasonable period or two-thirds of votes and more than half of co-ownership shares approve.
Challenges in Practice
Financial Burden
Energy renovations require substantial investments. The reserves of many HOAs are insufficient for this purpose. Special levies or loans place additional burdens on owners alongside already increased living costs.
Diverging Interests
In an HOA, owner-occupiers and investors, young families and retirees come together. Their interests and financial capabilities diverge. Reaching consensus is often arduous.
Skilled Labor Shortage
Qualified tradespeople and energy consultants are scarce. Waiting times for quotes and execution delay projects and increase costs.
Complex Subsidy Landscape
Subsidy programs for energy renovations are varied but confusing. Requirements and available funds change regularly.
Typical Renovation Measures
Heating Modernization
Replacing outdated heating systems typically offers the greatest savings potential. Options include heat pumps, district heating, pellet heating, or hybrid solutions. The choice depends on local conditions and municipal heat planning.
Facade Insulation
Retrofitting thermal insulation on the facade significantly reduces heat loss. However, the measure is cost-intensive and involves changes to the building's appearance.
Window Replacement
Modern windows with triple glazing improve energy efficiency and noise protection. Replacement can often also be carried out individually by unit owners.
Roof Insulation
Insulating the roof or top-floor ceiling is a comparatively cost-effective measure with good impact.
Photovoltaics
A photovoltaic system on the communal roof can cover part of the electricity demand and generate additional revenue. The legal structure -- such as tenant electricity models -- requires careful planning.
Success Factors for HOAs
Long-Term Planning
Energy renovation should be understood as a long-term process. A multi-year renovation roadmap creates transparency and enables adequate reserve accumulation.
Professional Support
Engaging qualified energy consultants and specialized planners increases the quality of measures and unlocks subsidy opportunities. Consulting costs are eligible for subsidies.
Transparent Communication
Owners should be informed early and comprehensively. Uncertainties and concerns lead to blockages. Objective information facilitates decision-making.
Phased Approach
Not everything needs to be implemented at once. Sensible prioritization -- for example, starting with the heating system -- distributes the burden and enables learning effects.
Conclusion
Energy renovation in existing HOA buildings is demanding but feasible. It requires forward-looking planning, professional support, and patient consensus-building. As a property management company in Frankfurt am Main and the Rhine-Main region, we support our clients in developing viable renovation concepts and accompany them through the entire process.
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*This article is for general information purposes and does not constitute individual technical or legal advice.*
