How to get a Netzbetreiber 'Anschlusszusage' and a dated cost estimate (after 1 July 2026) when buying a multi‑unit building

What an Anschlusszusage and a Netzanschluss cost estimate are

An "Anschlusszusage" is the network operator's written confirmation that a requested connection can be made (or why not) after a Netzanschlussprüfung. The operator must separately show the items and calculation for "Anschlusskosten" and any "Baukostenzuschuss" (a construction‑cost contribution) so the requester can understand how the price was formed. The statutory framework is the German Energy Industry Act (EnWG) and the Niederspannungsanschlussverordnung (NAV); the Federal Network Agency (Bundesnetzagentur) publishes practical guidance and FAQs explaining these steps and the operator’s disclosure duties. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/enwg_2005/BJNR197010005.html))

Why you should demand documents dated after 1 July 2026

Regulatory practice and local network plans change. A dated Anschlusszusage and a clear, signed cost estimate give you an evidentiary snapshot of the operator's position and the exact charges at that time. For sellers, an older Zusage may not reflect current network loads, new planning data or revised tariffs; for buyers it therefore matters that the documents are dated after the agreed reference date (here: 1 July 2026). Ask the Netzbetreiber for a formal Netzanschlussprüfung report and a dated written Zusage showing the detailed breakdown and any validity period. The Bundesnetzagentur reminds market participants that operators must respond within the statutory process and must show detailed cost calculations. ([bundesnetzagentur.de](https://www.bundesnetzagentur.de/DE/Fachthemen/ElektrizitaetundGas/Netzanschluss/start.html))

Practical steps for buyer and seller before notarisation

1) Ask the seller to order a Netzanschlussprüfung and to obtain a dated Anschlusszusage and a detailed cost estimate (break out "Anschlusskosten" vs. "Baukostenzuschuss"). Provide the Netzbetreiber with the planned metering points and expected load profile (kW per apartment) so the check is meaningful.

2) Require the Netzbetreiber report to state whether any reinforcement or relocation of network equipment is necessary, and whether the operator recommends an FCA (firm connection agreement) or other technical limit. The Bundesnetzagentur’s guidance explains the operator must show alternatives and reasons if it refuses or proposes a different connection point. ([bundesnetzagentur.de](https://www.bundesnetzagentur.de/DE/Fachthemen/ElektrizitaetundGas/Netzanschluss/start.html))

3) If upgrade works are triggered by an increase in ordered capacity (for example conversion of commercial space to apartments or additional EV charging), the party ordering the higher capacity normally pays the resulting Baukostenzuschuss; if the works are needed purely for the public network or for integration of a generation plant, different allocation rules can apply (see clearingstelle guidance on Verknüpfungspunkt for EE). Always get the operator’s written statement which costs are attributable to the requester’s demand and which are network‑borne. ([gesetze-im-internet.juris.de](https://www.gesetze-im-internet.juris.de/nav/BJNR247710006.html?utm_source=openai))

Sample Kaufvertrag clause (German, formal Sie) to limit buyer risk

Insert into the Kaufvertrag a condition precedent and indemnity:

"Der Verkäufer verpflichtet sich, bis spätestens [Datum einsetzen, z. B. 14 Tage vor Beurkundung] dem Käufer eine schriftliche Netzanschlusszusage des örtlichen Netzbetreibers sowie einen detaillierten, datierten Kostenvoranschlag (Ausweis von 'Anschlusskosten' und 'Baukostenzuschuss') vorzulegen. Die Zusage und der Kostenvoranschlag müssen nach dem 1. Juli 2026 datiert sein. Sollten aus Gründen, die bereits vor dem Datum des Kaufvertrags bestanden oder dem Verkäufer bei Vertragsschluss bekannt waren, vom Netzbetreiber nach Beurkundung noch Anschlusskosten oder Baukostenzuschüsse verlangt werden, so trägt diese Mehrforderung der Verkäufer. Forderungen des Netzbetreibers, die auf einer vom Käufer nach Beurkundung bestellten Leistungserhöhung beruhen, trägt der Käufer."

Notes: Treat the bracketed deadline and the allocation of post‑contract demands as negotiable. Ask your notary and a German real‑estate lawyer to adapt the clause; a seller may instead offer an escrow or purchase‑price reduction rather than an indemnity. This model clause is a drafting example and not legal advice. ([gesetze-im-internet.juris.de](https://www.gesetze-im-internet.juris.de/nav/BJNR247710006.html?utm_source=openai))

Key risks and who to ask

Risk: an old or unsigned Zusage that the Netzbetreiber later revises; Risk: a later demand for a high Baukostenzuschuss after ownership change; Risk: ambiguous cost split between what the requester must pay and what the network must bear. Ask the Netzbetreiber for a signed, dated Zusage and a clear statement which works are "notwendige Anschlusskosten" (the requester’s responsibility) and which are network investments. For legal certainty have your German notary (Notar) and an avocat/solicitor experienced in German property and energy law review the purchase deed and the proposed contract clause. ([bundesnetzagentur.de](https://www.bundesnetzagentur.de/DE/Fachthemen/ElektrizitaetundGas/Netzanschluss/start.html))