{"id":27258,"date":"2026-03-03T09:13:41","date_gmt":"2026-03-03T08:13:41","guid":{"rendered":"https:\/\/cubeconcepts.de\/?p=27258"},"modified":"2026-06-11T16:38:53","modified_gmt":"2026-06-11T14:38:53","slug":"from-the-geg-to-the-gmg","status":"publish","type":"post","link":"https:\/\/cubeconcepts.de\/en\/vom-geg-zum-gmg\/","title":{"rendered":"From the GEG to the GMG \u2013 What's changing in building energy policy?"},"content":{"rendered":"

The decided transition from Building Energy Act (GEG)<\/strong> to Building Modernization Act (BMA)<\/strong> brings profound changes to the regulatory framework for the building sector. The trigger is an interplay of a national change in direction and European adaptation pressure. The revised EU Buildings Directive must be transposed into German law by May 29, 2026, thus forcing the legislator to undertake structural reforms.<\/p>\n\n\n\n

The coalition's position paper<\/h3>\n\n\n\n

On February 24, 2026, the parliamentary groups of the Bundestag CDU\/CSU<\/strong> and SPD<\/strong> Here are the key points for the new law. The German federal government's goal is to fundamentally realign the existing framework of the traffic light coalition. The objectives were to minimize detailed technology and individual specifications, to make values more flexible, and to establish technology-neutral solutions and simplified procedures. The planned entry into force of the GMG is therefore scheduled for July 1, 2026 \u2013 a very ambitious timeline given the scope of the reform.<\/p>\n\n\n\n

End of the \u201cHeating Law\u201d<\/h3>\n\n\n\n

The renaming itself already signals a paradigm shift. While the previous GEG was politically strongly associated with the term \u201eHeating Law\u201c<\/strong> was linked, the GMG is intended to consciously serve a broader narrative. The focus is shifting from individual technologies to the comprehensive modernization of the building stock \u2013 including the building envelope, energy supply systems, neighborhood solutions, and infrastructure. According to the government, this strategic change of perspective is not only motivated by communication but is also intended to reduce investment barriers and create planning certainty.<\/p>\n\n\n\n

Controversial reform<\/h3>\n\n\n\n

At the same time, it is Reform plans<\/strong> politically and technically highly controversial<\/strong>. Environmental and industry associations warn of possible setbacks in climate protection, while proponents primarily highlight greater freedom of choice and reduced regulatory complexity. The discussion around the GMG has thus long been more than a technical legislative amendment \u2013 it is a fundamental debate about the future control mechanism for the heating transition in the building sector.<\/p>\n\n\n\n

Classification in the context of the EU Directive (EPBD)<\/h2>\n\n\n\n

The transition from the GEG to the GMG is not solely motivated by national politics, but is significantly determined by European legal requirements. The basis for this is the amended EU Buildings Directive<\/a>, which was adopted in 2024 and must be transposed into national law by May 29, 2026, at the latest. This directive \u2013 often referred to by the abbreviation EPBD<\/strong> (Energy Performance of Buildings Directive) \u2013 sets a significantly stricter regulatory framework for the energy transformation of the building sector in all Member States.<\/p>\n\n\n\n

Life Cycle Assessments<\/h3>\n\n\n\n

The core of the EU regulations is a holistic assessment approach: Buildings will no longer be judged solely on their operational energy consumption but over their entire life cycle. The introduction is therefore planned Mandatory life cycle assessments<\/strong> (Life Cycle Assessments) that consider all emissions from building material production through the usage phase to demolition. This shifts the regulatory focus from individual measures to a systemic view of buildings as long-term emission systems.<\/p>\n\n\n\n

EPBD as a Key Lever for the EU<\/h3>\n\n\n\n

Furthermore, the directive requires the phased introduction of zero-emission standards for new buildings, new efficiency classes for existing buildings, and renovation passports based on individual renovation roadmaps. This is supplemented by specific requirements for the use of renewable energies \u2013 for example, through a Solar obligation for real estate<\/a>. Particularly relevant here is that the EPBD explicitly identifies the existing building stock as a key lever for climate protection, as the majority of existing buildings are energetically inefficient.<\/p>\n\n\n\n

Clear framework conditions for GEG & GMG<\/h3>\n\n\n\n

For Germany, this means: Even if national political majorities opt for simplification, technological openness, or deregulation, Do the European minimum requirements have to be strictly adhered to?<\/strong>. The planned GMG is therefore not freely negotiable but operates within a clearly defined European framework. The reform is thus less a political option than a legal necessity \u2013 and at the same time a balancing act between national freedom of design and binding EU climate targets<\/strong>.<\/p>\n\n\n\n

Against this backdrop, it becomes understandable why the current legislative reform is so strongly focused on structural changes. German building energy law not only needs to be politically realigned, but at the same time European Union law compliant<\/strong> and designed for future viability.<\/p>\n\n\n\n

Content changes from GEG to GMG<\/h2>\n\n\n\n

At the heart of the planned reform from the GEG to the GMG are several structural interventions in the previous control logic of building energy policy. While current law relied heavily on direct technical specifications at the building level, the new concept shifts responsibility partly to the energy market and offers owners greater freedom of choice in selecting their heating and supply systems.<\/p>\n\n\n\n

Rule 65-% & Duty to Advise Repealed<\/h3>\n\n\n\n

The most significant change concerns the Abolition of the previous 65-% rule<\/strong> for renewable energies in the installation of new heating systems. Previously, this required new systems to be operated predominantly with renewable energies. According to the key points paper, this requirement is to be completely dropped. At the same time, the previous Advisory obligation for heating system replacement abolished<\/strong>. This would eliminate a central steering instrument that was previously intended to accelerate the transition to climate-friendly technologies.<\/p>\n\n\n\n

Green Fuels in Focus<\/h3>\n\n\n\n

A direct mandate will be replaced by an indirect mechanism in the future. A so-called Green gas or green heating oil quota<\/strong>. Under the plans of the BMWE, energy suppliers are to be obliged to gradually mix increasing proportions of climate-friendly gases or oils into their fuels. These include, for example, biomethane, synthetic methane, or various hydrogen variants. The quota is to start in 2028 with up to one percent and then increase. This shifts climate policy control from the building itself to the upstream energy supply chain.<\/p>\n\n\n\n

The \u201cBio-Stairs\u201d<\/h3>\n\n\n\n

This model is supplemented by the so-called \u201eBio-staircase\u201c<\/strong>. It applies to newly installed heating systems and requires that, starting in 2029, they must use an increasing proportion of carbon-neutral fuels. The initial target is set relatively low at 10%, with further increases to be established by law through 2040. At the same time, the CO\u2082 price<\/strong>. However, critics warn that the necessary quantities of green gas are limited and could result in long-term cost risks.<\/p>\n\n\n\n

Heat planning<\/h3>\n\n\n\n

Structurally, the GMG also brings changes. Municipalities with fewer than 15,000 inhabitants are to be handled by Heat planning<\/strong> be significantly reduced. According to the key points, the workload could drop to about 20% of the current level. At the same time, support for heating networks is to be enshrined in law and expanded in order to accelerate the development of climate-friendly infrastructure.<\/p>\n\n\n\n

Key changes from GEG to GMG<\/h3>\n\n\n\n
Control range<\/strong><\/td>Previous GEG<\/strong><\/td>Planned GMG<\/strong><\/td>Possible effects<\/strong><\/td><\/tr>
Heating requirements<\/td>65 %: Renewable energy is mandatory<\/td>Requirement waived<\/td>less immediate transformation pressure<\/td><\/tr>
Control mechanism<\/td>Direct building rules<\/td>Quotes from energy providers<\/td>Shift to Market Instruments<\/td><\/tr>
Gas and oil heating<\/td>severely restricted<\/td>again generally permissible<\/td>possible lock-in effects<\/td><\/tr>
Bio-fuel content<\/td>already present, higher entry threshold<\/td>Starting at 10 % from 2029<\/td>slower ramp-up<\/td><\/tr>
Duty to advise<\/td>obligatory<\/td>is omitted<\/td>Freedom of choice, but a higher risk of making the wrong decision.<\/td><\/tr>
Heat planning<\/td>Uniform requirements<\/td>greatly simplified for small municipalities<\/td>reduced administrative overhead<\/td><\/tr>
District heating network funding<\/td>Subsidy program<\/td>legally secured and expanded<\/td>Infrastructure development is facilitated<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Criticism of the switch from GEG to GMG<\/h2>\n\n\n\n

Despite the intended flexibility, the reform plan is encountering significant technical and political reservations. Central points of criticism from environmental associations and energy experts are directed against the abolition of the 65 percent target, which was previously considered a reliable driver for the market ramp-up of heat pumps. Critics, including the German Environmental Aid<\/strong> and the think tank Agora Energiewende<\/strong>, warn of a \u201eDecarbonization gap<\/strong>\u201cThey fear that the mere hope of future availability of green gases will delay the necessary replacement of fossil fuel heating systems. Since the quantities of Biomethane<\/strong> and green hydrogen<\/strong> foreseeable limited and costly<\/strong> remain, there's a danger that consumers will fall into a Cost trap<\/strong> tapping if green gas quotas lead to rising fuel prices.<\/p>\n\n\n\n

Furthermore, the reduction of the requirements for the municipal heat planning<\/strong> viewed critically in smaller communities. While politicians speak of relief, industry representatives warn of a Planning vacuum<\/strong>Without clear local guidelines, property owners lack direction on whether their building will be connected to a district heating network in the future or if it must be supplied decentrally. Risks also loom at the European level. If Germany fails to meet sectoral climate goals by weakening national standards, it could face penalties under the burden of EU Effort Sharing Regulation<\/strong> billion-dollar Penalties<\/strong> become due. Critics therefore summarize that the new openness to technology could come at a high price \u2013 by shifting the pressure for transformation to the 2030s, when significantly more radical and costly interventions might be necessary.<\/p>\n\n\n\n

Impacts on Companies & Real Estate Industry<\/h2>\n\n\n\n

For companies, project developers, and property owners, the transition from the GEG to the GMG marks a potential shift in strategy for investment and modernization planning. While the previous regulations heavily relied on clearly defined technical requirements, thus comparatively unique transformation paths<\/strong> provides, the new law indicates a more flexible, but at the same time less deterministic control system<\/strong> . For the real estate industry, this means above all greater freedom to make decisions\u2014but also greater responsibility for long-term investment risks.<\/p>\n\n\n\n

Price and market risks<\/h3>\n\n\n\n

In particular, the abolition of the fixed 65 percent requirement fundamentally changes the planning logic. Until now, investors could relatively calculate accurately<\/strong>, which technologies are regulation-proof. In the future, profitability will depend more heavily on Market prices<\/strong> for energy sources, the development of green gas quotas, and possible legislative adjustments. This shifts the risk from regulatory certainty to Price and market risks<\/strong>.<\/p>\n\n\n\n

Advantages & Cost Traps<\/h3>\n\n\n\n

For commercial property owners, this increased flexibility short-term benefits<\/strong> bring. The possibility of continuing to install gas or oil heating systems initially lowers investment costs and postpones major modernization measures. This can conserve liquidity, especially in tight financing phases. At the same time, however, the Risk of so-called stranded assets<\/strong> \u2013 also technical systems that are currently permissible but will become economically unattractive in the future due to rising energy costs, stricter climate goals, or infrastructure decommissioning.<\/p>\n\n\n\n

Costly \u201cgreen gases\u201d<\/h3>\n\n\n\n

A key uncertainty factor is the future Green Gas Price Development<\/strong>. Studies involving the Institute of the German Economy indicate that biomethane and hydrogen will, for the foreseeable future handsome<\/strong> and high-cost energy sources<\/strong> may remain. Should demand increase significantly due to statutory quotas, operating costs could be significantly higher in the long term than current projections. For companies with large property portfolios, this would make the decision for certain heating technologies a strategic portfolio question<\/strong> develop.<\/p>\n\n\n\n

Difficult decisions<\/h3>\n\n\n\n

Conditions are also changing for project developers and property owners. On the one hand, the planned law promises more Technology openness<\/strong> and with that greater flexibility<\/strong> in the planning of energy concepts. On the other hand does the analysis effort increase<\/strong>, because the optimal solution is no longer primarily dictated by regulatory minimum standards, but must be determined by a combination of energy price expectations, incentive frameworks, CO\u2082 costs, and infrastructure development. Investment decisions are thus increasingly becoming scenario-based decisions.<\/p>\n\n\n\n

Unclear funding landscape <\/h3>\n\n\n\n

Some in the industry view the planned better alignment of funding instruments and legal requirements positively. Securing long-term funding for federal subsidies for energy-efficient buildings could provide planning certainty, particularly for larger renovation programs. However, the key factor will be how stable these funding conditions are actually designed to be and whether they remain compatible with European target pathways.<\/p>\n\n\n\n

New Areas of Tension<\/h3>\n\n\n\n

This creates a field of tension for the real estate industry as a whole:<\/p>\n\n\n\n