Required Disclosures for Landlords in North Rhine-Westphalia
Mandatory landlord disclosures in NRW, Germany: energy certificate, operating costs, prior rent, CO₂ costs, and modernization notices.
Legal Disclaimer
This content is for general informational and educational purposes only. It does not constitute legal advice and should not be relied upon as such. Laws change frequently — always verify current regulations and consult a licensed attorney in your jurisdiction for advice specific to your situation. Landager is a property management platform, not a law firm.
Landlords in North Rhine-Westphalia are required by federal and EU law to provide tenants with a range of information and disclosures. Violations can result in damage claims, fines, or the invalidity of certain contract clauses.
Disclaimer: This guide provides general legal information for educational purposes only and does not constitute legal advice. Always consult a licensed attorney in North Rhine-Westphalia for guidance specific to your situation. Information last verified: March 2026.
Overview of Disclosure Requirements
| Disclosure | Timing | Legal Basis |
|---|---|---|
| Energy Performance Certificate | At viewing, by lease signing at latest | § 87 GEG |
| Prior rent (Vormiete) | Upon tenant request | § 556g(3) BGB |
| Operating cost statement | Annually, within 12 months of billing period | § 556(3) BGB |
| Known defects | Before lease signing | § 536d BGB |
| CO₂ costs | Annually, with operating cost statement | CO2KostAufG |
| Modernization notice | At least 3 months before start | § 555c BGB |
| Rent increase letter | Before each rent increase | §§ 558a, 559b BGB |
Energy Performance Certificate
The energy certificate is mandatory under § 87 of the Building Energy Act (GEG). Landlords must:
- Actively show the certificate during property viewings (not merely make it available)
- Hand over a copy to the tenant at lease signing at the latest
- Include energy data (energy demand value, energy efficiency class) in property listings
Fine: Violations regarding the energy certificate can result in fines up to €15,000.
Energy certificates are valid for 10 years and must be renewed upon expiration.
Prior Rent Disclosure (Rent Cap Areas)
In the 57 municipalities in NRW where the rent cap (Mietpreisbremse) applies, landlords must provide information about the prior rent upon written request from the tenant (§ 556g(3) BGB). This is relevant when the landlord claims an exemption from the rent cap.
Possible exemption grounds:
- New construction (first occupancy after October 1, 2014)
- Comprehensive modernization (first occupancy after renovation)
- Prior rent already exceeded the rent cap limit
The landlord must proactively disclose the exemption basis in text form before signing the lease.
Operating Cost Statement
If operating cost prepayments are agreed, the landlord must issue an annual statement:
- Billing period: Typically 1 year (calendar or fiscal year)
- Deadline: 12 months after the end of the billing period (§ 556(3) BGB)
- Missed deadline: Landlord loses the right to demand additional payment; tenant retains refund rights
The statement must:
- Itemize all billed positions individually
- State the allocation method and total costs
- Credit the tenant's prepayments
CO₂ Cost Allocation (Since 2023)
Since January 1, 2023, the CO₂ Cost Allocation Act (CO2KostAufG) requires CO₂ costs from heating fuel to be shared between landlord and tenant using a tiered model based on the building's energy efficiency:
| CO₂ Emissions (kg CO₂/m²/year) | Tenant Share | Landlord Share |
|---|---|---|
| Below 12 | 100% | 0% |
| 12–17 | 90% | 10% |
| 17–22 | 80% | 20% |
| 22–27 | 70% | 30% |
| 27–32 | 60% | 40% |
| 32–37 | 50% | 50% |
| 37–42 | 45% | 55% |
| 42–47 | 40% | 60% |
| 47–52 | 35% | 65% |
| Above 52 | 5% | 95% |
The landlord must break down CO₂ costs annually alongside the operating cost statement and document the allocation.
Modernization Notices
Before planned modernization measures, the landlord must inform the tenant:
- At least 3 months before the start, in writing (§ 555c BGB)
- Include the type, scope, start date, expected duration, and anticipated rent increase
- Inform the tenant of their special termination right (until the end of the second month after notice, § 555e BGB)
Known Defects
The landlord must disclose any known material defects of the rental property before or at lease signing. Concealed defects may:
- Entitle the tenant to rent reduction
- Give rise to damage claims
- Void the landlord's limitation of liability
Typical defects requiring disclosure: mold, known construction flaws, noise sources, persistent odor issues from the surroundings.
Best Practices for Landlords
- Create a handover protocol with photos, signed by both parties
- Keep the energy certificate current and bring it to all viewings
- Issue operating cost statements on time and in full
- Factor the CO₂ allocation into your operating cost calculations from the start
- Inform tenants in writing about rent cap exemptions before the lease is signed
Landager helps landlords manage disclosure documents, track deadlines, and handle operating cost statements.
Back to North Rhine-Westphalia Landlord-Tenant Laws Overview.
Sources & Official References
Ready to simplify your rental business?
Join thousands of independent landlords who have streamlined their business with Landager.