Building a House as an Unmarried Couple: Land Register, Safeguards and Risks
Anyone building unmarried has neither an equalisation of gains nor a statutory right of inheritance. All the more important are a well-thought-out land register entry and contractual safeguards. This guide classifies land register variants, a partnership agreement, a power of attorney and a will and names the risks in the event of separation or death. It does not replace legal advice.
Anyone building as an unmarried couple does not enjoy the legal safeguards of marriage: there is no automatic equalisation of accrued gains, no statutory right of inheritance and no marital-home rule. This makes a well-thought-out land-register entry (Grundbuch) and contractual safeguarding all the more important. This guide places land-register variants, provision and risks into perspective. How the route into home ownership fundamentally runs is shown by our guide to buying a prefab house.
Important note
This article offers general orientation and does not replace legal advice. For your personal situation, seek advice from a notary or a lawyer before concluding a contract.
Short answer: Unmarried couples should always both be entered in the land register (Grundbuch) – either each with a half share or with shares that correspond to the actual financial contribution. Additionally, a partnership agreement, a healthcare power of attorney (Vorsorgevollmacht) and a will regulate what applies in the event of separation, illness or death. Without these building blocks, the non-registered partner can end up empty-handed in a worst case.
Who should be entered in the land register?
Short answer: Whoever is in the land register (Grundbuch) is legally the owner – regardless of who pays the bills or lives in the house. If both pay, both should also be entered. Entry is possible each with a half share or according to shares that correspond to the capital brought in and the ongoing payments. Only the land-register entry decides on ownership.
Land-register variants for unmarried couples
| Variant | How it works | Fits when … |
|---|---|---|
| Each half share (50/50) | both entered in equal parts | both contribute roughly the same |
| Share arrangement | shares according to financial contribution | equity/instalments clearly differ |
| Only one person | one person entered alone | only one finances – partner is unprotected |
The distinction between ownership and payment is important: whoever is in the land register alone is legally the sole owner, even if the partner co-pays for years. Payments by the non-registered partner do not establish automatic ownership and can only be reclaimed with difficulty in a dispute. Therefore the actual contributions – equity, instalments, DIY work – should be documented from the outset and the entry chosen accordingly. With very different contributions, the share arrangement is fairer than a flat halving.
How the land-register entry, notary and costs are connected is explained by the guide to notary costs & land register.
How do partners without a marriage certificate protect themselves?
Short answer: Three building blocks create security: a partnership agreement regulates ownership shares, compensation payments and what happens to the house in the event of separation. A healthcare power of attorney (Vorsorgevollmacht) ensures that the partner may act in the event of illness. A will safeguards the surviving partner, because unmarried couples have no statutory right of inheritance.
- Partnership agreement: record ownership shares, payments and separation consequences in writing.
- Healthcare power of attorney and living will: secure the ability to act in the event of illness.
- Will: safeguard the surviving partner – without a will they inherit nothing under statute.
- Loan contract: clarify who is liable and document both contributions.
- Term life insurance: secure the loan instalment in the event of the partner’s death.
Take inheritance tax into account
Unlike spouses, unmarried partners have only a low inheritance-tax allowance and fall into an unfavourable tax class. With larger assets, early advice from a notary or tax adviser pays off.
The partnership agreement is the heart of the safeguarding. It records who is entitled to which ownership share, how joint investments are handled and what happens in the event of a separation – for example a right of first refusal for one partner or a compensation payment. Without such an agreement, in a dispute it would have to be laboriously reconstructed who contributed how much, which often ends in a lengthy legal dispute. A notarised contract creates clear, robust conditions here. The healthcare power of attorney in turn ensures that the partner may make decisions and manage contracts in the event of illness or accident – without it, even a long-term life partner is legally left out.
First plan, then build
Before you sign the construction contract, the land register and safeguarding should be in place. In parallel, compare suitable house offers free of charge and without obligation.
Who is liable for the construction loan?
Short answer: If both sign the loan contract, they are jointly and severally liable – the bank can call on each of them for the full instalment, even after a separation. Therefore both should be in the land register and the contributions should be documented. A term life insurance protects against a residual debt that cannot be borne alone.
Joint and several liability means specifically: if one partner can or will no longer pay after a separation, the bank demands the full instalment from the other. Whoever pays can indeed obtain internal compensation from the former partner, but bears the default risk alone. A term life insurance covering the residual debt is therefore almost indispensable with larger loans – it prevents the surviving partner from facing a debt that cannot be borne alone in the event of death and having to sell the house.
Basics on financing and on the role of equity are offered by the guides to construction financing 2026 and equity when building a house.
What risks loom in the event of separation or death?
Short answer: Without a contract and will, there loom disputes over ownership shares, a partition auction in the event of disagreement and the loss of the right of residence for the non-registered partner. If one dies, without a will the statutory relatives inherit – not the partner. Provision prevents these harsh consequences.
What happens to the joint house in the event of a separation and which options remain is dealt with by the guide to the house on separation and divorce. Basic questions about building for families are clarified by the guide to building a house for young families.
Conclusion: clear rules protect both partners
Building unmarried is unproblematic when the land register, contract and provision are cleanly regulated. Both partners in the land register, a partnership agreement, a power of attorney and a will create security for separation, illness and death. Further neutral information is offered by the consumer advice centre (Verbraucherzentrale). The binding drafting belongs in the hands of a notary or lawyer.
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