Wärmenetzpaket (Bundeskabinett, 26 Aug 2026): the €0.50/m² cap — what buyers in Munich, Frankfurt and Hamburg must insist is written into the notarised purchase contract

What the Bundeskabinett decided on 26 August 2026

On 26 August 2026 the Federal Cabinet (Bundeskabinett) published the Eckpunkte for a Wärmenetzpaket that will be converted into a Gesetzesvorhaben. The document explicitly allows—where a landlord or a third party makes "significant investments" in the heating system, for example when switching a building to district heating—for a monthly additional charge of up to €0.50 per square metre of living space to be passed on to tenants. The Eckpunkte also envisage consolidating existing Fernwärme rules (for example the AVBFernwärmeV and the FFVAV) into a new Wärmenetzgesetz and adapting private‑law provisions such as § 556c BGB. (Sources: BMWE press release and ministry newsletter.)

The Eckpunkte are a policy framework, not yet a final law. They set the maximum pass‑through figure at €0,50/m² per month and propose new federal price‑transparency and price‑oversight arrangements for district heating; the concrete statutory wording and entry into force will follow normal legislative steps after this cabinet decision. Buyers must therefore treat the €0,50/m² figure as the current policy cap set out in the cabinet paper of 26.08.2026, not as already consolidated statutory text applicable in every contract. (Sources: BMWE; industry summaries.)

Why this matters for buyers (Munich, Frankfurt, Hamburg)

Switching a building to district heating or taking over a connection can change both one‑off and ongoing cashflows. Municipal rules, local network operators' connection conditions and any existing house‑level agreements determine who pays the Baukostenzuschuss (construction/connection contribution), the house‑connection cost, and whether the buyer inherits an existing Wärmeliefervertrag. A policy cap of €0.50/m² limits tenant pass‑throughs but does not remove upfront connection charges, assignment requirements, supplier consent clauses or amortisation arrangements that can create liabilities for a future owner. (Sources: BMWE; industry guidance.)

For buyers in Munich, Frankfurt or Hamburg this is not theoretical: many sales already include express clauses that require the purchaser to sign the supplier's standard connection and supply contract, or to accept liability for outstanding connection levies. Before notarisation those obligations can and should be clarified by contract. (Sources: practice checklists and contract guidance.)

Three notarised clauses every buyer should insist on

1) Seller warranties and full disclosure: a notarial clause in which the seller warrants in writing that they have disclosed all existing Wärmelieferverträge, Baukostenzuschüsse, pending claims by the utility, last three supplier invoices, and the full text of any 'Ergänzende Bedingungen' (special ancillary conditions). Require the seller to deliver originals before signing or make delivery a contractual condition precedent. (Source: practical checklists for notarisation.)

2) Transfer consent and indemnity: a clause stating that the seller will obtain written consent from the network operator/supplier to transfer any rights or to novate the supply agreement to the buyer at or before closing; if consent is refused, either: (a) the seller bears the cost of procuring an equivalent supply, or (b) the purchase price is reduced by a pre‑agreed sum covering expected connection/termination costs. This clause should include an explicit amortisation schedule for any seller‑funded connection investments and a warranty that no subsidy or grant clawback applies. (Sources: property contract practice; sector commentary.)

3) Escrow / price retention for unresolved charges: require the notary to hold a portion of the purchase price in escrow (Aufbewahrung/Treuhand) or create a retention (Rückbehalt) until the seller provides written proof that all connection levies, Baukostenzuschüsse and supplier claims up to the date of handover are discharged. State precise triggers and deadlines (for example: seller produces clearance letters within 60 days after handover or escrow is released). (Sources: notary practice guidance and contract samples.)

Practical drafting tips and red flags at the notarisation table

Use measurable triggers and amounts. Do not accept vague seller promises such as "seller will settle all outstanding charges" without a deadline, documentary proof and a specific sum or escrow mechanism. Where the Eckpunkte set a tenant pass‑through cap of €0.50/m², require the seller to confirm whether any current or planned tenant charge will rely on the new rule and to quantify tenant‑facing costs today vs. projected after conversion. Insist that the notary record whether any municipal Satzung imposes an Anschlusszwang for the plot. (Sources: BMWE Eckpunkte; contract checklists.)

Finally, instruct local counsel or a notary experienced with Fernwärme to review supplier standard terms (Allgemeine Bedingungen) and to prepare agreed fallback wording for the purchase contract in case supplier consent is denied. These steps reduce the risk that an apparently small monthly tariff cap produces large unexpected purchase‑price adjustments or remedial bills after closing.

Next steps and professional help

Before signing any notarised deed: (1) obtain the seller’s full Wärmelieferunterlagen and final supplier account statement; (2) instruct a notary to draft the three clauses above as beurkundete Verpflichtungen; (3) commission a short technical estimate of connection costs and of expected tenant charge impact using the €0.50/m² cap; and (4) require escrow or price retention when uncertainty remains. These are precautionary contracting measures — they do not replace legal advice. Ask a German‑qualified notary or Rechtsanwalt for contract drafting and local regulatory checks. (Sources: property contract practice and BMWE materials.)

This article summarises the cabinet Eckpunkte of 26.08.2026 and practical contract steps buyers should consider. It does not constitute legal or tax advice.