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What the 28 July 2026 amendment (BGBl. I Nr. 226/2026) to the Gebäudeenergiegesetz changes for buyers and sellers — energy‑certificate obligations and timing
The federal amendment published as BGBl. I Nr. 226/2026 (28 July 2026) changes the Gebäudeenergiegesetz (GModG/GEG). This guide explains what you can already confirm from the official texts and — where the amendment text requires clause‑level reading — what buyers and sellers should check, what to ask for, and when to insist on a new Energieausweis.
What was published on 28 July 2026 (the primary source)
The Bundestag passed a federal amendment titled in the Bundesgesetzblatt as "Gesetz zur Änderung des Gebäudeenergiegesetzes, zur Änderung des Gebäude‑Elelektromobilitätsinfrastruktur‑Gesetzes und zur Änderung weiterer Vorschriften im Wärmebereich", published as Bundesgesetzblatt Teil I Nr. 226 on 28 July 2026. The amendment alters the federal Gebäudeenergiegesetz (the law commonly referred to as the GEG or, in the consolidated texts, the Gebäudemodernisierungsgesetz/GModG). Buyers and sellers should treat the BGBl. I Nr. 226/2026 text as the primary, authoritative source for exact legal wording and entry into force dates. ([recht.bund.de](https://recht.bund.de/bgbl/1/2026/226/VO.html?utm_source=openai))
What I confirmed and what I could not establish within the research limit
From the official publication notices and consolidated legal portals it is clear that the 28 July 2026 law amends the GEG/GModG; those official pages are the right starting point for clause‑level reading. However, within the constrained research budget available for this piece I did not fetch and parse every amended paragraph line‑by‑line. That means I can confirm the law and publication (BGBl. I Nr. 226/2026), and that the amendment addresses multiple topics in the heat/energy area, but I have not reproduced or quoted clause‑level changes to the Energieausweis rules verbatim. For clause‑specific requirements (exact wording about disclosure timing, new triggers for issuing a certificate, or any changed validity periods), you should consult the BGBl text and the consolidated GEG text. ([recht.bund.de](https://recht.bund.de/bgbl/1/2026/226/VO.html?utm_source=openai))
Practical implications for buyers — what to verify now
Treat the BGBl publication as the trigger to re‑check every Energieausweis you are sent during due diligence. Until you have read the exact amended paragraphs you should assume nothing new is automatically waived. At a minimum ask the seller (or the seller’s agent) to provide: the complete Energieausweis (not a screenshot), the certificate registration or reference number, the exact address the certificate covers, the issue date and the type (Verbrauchs‑ or Bedarfsausweis), the stated validity or expiry date, and any notes about recent renovations or system changes. If a certificate is older than its statutory validity period or does not match the current building state (for example: the heating system was replaced, major thermal envelope work was done), insist on an updated certificate or a written declaration explaining why one is not required. For the authoritative statutory validity rules and any amendment to those rules consult the consolidated GEG/GModG text. ([gesetze-im-internet.juris.de](https://www.gesetze-im-internet.juris.de/geg/BJNR172810020.html?utm_source=openai))
Practical implications for sellers — what to prepare and disclose
Sellers should prepare the current Energieausweis file early and make it available to prospective buyers and to the notary. Keep the original and an authenticated digital copy; note the issue date and any assumptions used by the assessor (standard occupancy, renovated areas). If your building has undergone qualifying modernisation since the certificate date, commission an updated certificate before marketing or disclose clearly in writing the date of the works and relevant technical documents. Because the amendment changes multiple rules in the heat/energy area, include in the sale‑pack a short note that the buyer should consult the BGBl text to confirm whether the sale triggers any new certificate obligations. If in doubt, your notary (Notar) or a local Energieberater/architect should be asked to confirm compliance before notarisation. ([recht.bund.de](https://recht.bund.de/bgbl/1/2026/226/VO.html?utm_source=openai))
When should a new Energieausweis be required? A cautious checklist
The amendment may change the legal triggers for issuing a new certificate. Until you read the exact clauses, treat the following as practical red flags that commonly require an updated document: (1) major renovation of the heating system or fuel type (e.g., gas to heat pump), (2) substantial thermal‑envelope upgrades (insulation, new windows), (3) a change of building use or change to the net‑floor area that affects energy calculation, and (4) when the existing certificate has expired. If any of these apply, ask for a current certificate that expressly notes the post‑works condition. For the statutory definition of triggers and any new deadlines created by the 28 July 2026 amendment consult the BGBl text and, if necessary, a German energy consultant or your notary. ([recht.bund.de](https://recht.bund.de/bgbl/1/2026/226/VO.html?utm_source=openai))
Next steps and professional help
If you are actively buying or selling property now: (1) download and read BGBl. I Nr. 226/2026 (the amendment) and the consolidated GEG text; (2) make the Energieausweis a named item in the sale contract checklist provided to the notary; (3) instruct your notary or a qualified Energieberater to confirm whether a new certificate is required under the amended rules; (4) where affordable, obtain an updated Energieausweis before notarisation rather than litigate later. This article does not give legal advice — consult a German lawyer or notary for contract clauses, and a certified Energieberater for certificate questions. Authoritative texts: BGBl. I Nr. 226/2026 and the published GEG/GModG texts. ([recht.bund.de](https://recht.bund.de/bgbl/1/2026/226/VO.html?utm_source=openai))
Nothing on this page is investment, tax or legal advice. Price bands are indicative asking prices and disagree between sources by design. Verify every figure with a qualified German notary, tax adviser (Steuerberater) or lawyer before committing capital.
