Heating Act & Renovation Requirements for 2026: How Modernization Needs Affect Purchase Price and Negotiations

It is important to note that things are rarely simply “good” or “bad.” What matters is the specific need for modernization (e.g., boiler age, insulation standards, windows, hot water) and which legal requirements apply in each individual case. The Building Energy Act (GEG), for example, stipulates certain replacement and retrofitting obligations that may become particularly relevant following a change of ownership. At the same time, deadlines, exceptions, and reasonableness depend on specific details—so sweeping generalizations are unreliable.

For negotiations, this means: Those who prepare their data thoroughly negotiate with greater ease. Buyers should have the energy performance certificate, recent maintenance or replacement receipts, and a rough cost estimate (e.g., from specialized contractors) on hand. Sellers, in turn, benefit from transparency, because uncertainty almost always leads to higher discounts. If you have any questions about this: Feel free to write to us or give us a call —Hausmann Immobilien provides support in Willich and within a roughly one-hour drive radius for classification, valuation, and realistic pricing strategies.

The front door opens, the floor plan is perfect, the garden is just right—and then you find yourself in the boiler room. In 2026, this is often the moment when buyers start to reevaluate the purchase price. Whether it’s a gas condensing boiler, a heat pump, an oil-fired system, or a night storage heater: The condition of the heating system and a look at the energy performance certificate now influence not only running costs but also financing, the modernization budget, and thus the basis for negotiation. Especially around Willich, Krefeld, Viersen, Mönchengladbach, and Düsseldorf, we’re seeing that buyers are asking earlier and more specifically—partly due to the debates surrounding the Building Energy Act (GEG) and potential renovation obligations.

The most important point here: Uncertainty is costly—for both sides. Anyone who hears only “the heating system is old” often factors in a safety margin. A clear plan is better: year of construction and type of system, maintenance records, consumption data, energy performance metrics, and a realistic cost range for potential measures (e.g., heating optimization, hydraulic balancing, replacement). This turns gut feeling into a clear-cut negotiation: Which points are necessary in the short term, what makes sense in the medium term, and what is optional? If you’d like to assess this for a property in Willich and the surrounding area: Feel free to write to us or give us a call —Hausmann Immobilien supports you with valuation and pricing strategy on equal footing.

In 2026, the so-called “Heating Act” will essentially revolve around the Building Energy Act (GEG) —and thus the question of which heating technology is permissible, practical, and financially viable in the long term. Important for buyers in Willich and the surrounding area: Not every existing heating system has to be replaced immediately. Often, the specific condition matters: Is the system merely old, or is it defective? Is it a constant-temperature boiler, which may be subject to replacement under certain conditions? And are there exceptions, for example depending on the building type, use, or if certain deadlines apply? It is precisely these details that determine whether modernization is “nice to have”—or needs to be factored into the calculation promptly.

At the same time, “renovation obligations” often come up in discussions. These usually refer to retrofitting requirements under the GEG, such as insulation (e.g., top-floor ceiling) or the insulation of heating and hot water pipes. These points can become particularly relevant in the event of a change of ownership —but not across the board and not without reviewing the documentation. Our tip for negotiations: Gather facts (energy performance certificate, year of construction/type of heating system, modernization documentation) and use them to derive a reasonable cost range. If you’d like to get a clear picture of this for a property within about an hour’s drive of Willich: Feel free to write to us or give us a call.

During home tours around Willich (and within a one-hour radius), the questions in 2026 rarely revolve around “What kind of heating system is installed?”—but rather around the risks and costs that could realistically arise from it. A typical joint fact-check includes: the year of construction and type of heating system (e.g., gas condensing boiler vs. older boiler), its condition (maintenance, malfunctions, replacement of individual components), as well as the energy performance certificate as a guide to the energy efficiency standard. Important: The energy performance certificate does not replace a technical inspection, but it helps to make the discussion about purchase price and modernization more objective.

Also relevant in the context of the Building Energy Act (GEG) are potential retrofit issues that buyers factor into their financing: insulation of the top floor ceiling (if not already present), insulation of heating and hot water pipes in unheated rooms, and the question of whether a system may be subject to a replacement requirement. Sellers benefit here from having documentation (invoices, reports, photos, modernization overview), because uncertainty in negotiations almost always leads to larger price reductions. If you’d like to assess this accurately for a specific property: Feel free to write to us or give us a call —Hausmann Immobilien helps you realistically evaluate modernization needs and negotiate fairly.