Cohabitation Property Rights: Who Owns What?

Cohabiting or unmarried couples in the UK often discover they have fewer legal rights than they expect when their relationship ends. Unlike married couples, whose finances are dealt with by the Matrimonial Causes Act 1973 or the Civil Partnership Act 2004, cohabitants don’t enjoy the same protections. Senior Solicitor Estella Newbold-Brown explains how cohabitation affects property ownership and examines a landmark case that sheds light on how courts determine who owns what.

What is Cohabitation?

Cohabitation typically refers to a couple who live together in a committed relationship but have not entered into marriage or a civil partnership. For married couples, a divorce (or dissolution in the case of civil partnerships) triggers specific legislation that allows a court to distribute property and finances in a fair way.

Unmarried couples, however, are subject to entirely different legal considerations. Family law specialists at HM & Co. Solicitors handle areas of law specific to cohabitation, but here is an overview of four main scenarios in which property can be owned—and a look at the landmark case of Stack v. Dowden.

The Case of Stack v. Dowden

Stack v. Dowden is a leading case from the House of Lords that clarified how courts determine interests in property after an unmarried couple separates. Previously, the law around beneficial interests was uncertain.

In this case, the couple started their relationship in 1975, and in 1983 Ms Dowden bought a property in her sole name, paying for everything on that property. Mr Stack was self-employed, while Ms Dowden was an electrical engineer. The couple had four children and, in 1993, purchased another property jointly—without a clear declaration of their shares.

  • Key Facts:
    • Property price: £190,000
    • Ms Dowden contributed: £128,830 (from savings and her former property)
    • Joint mortgage: £65,025 (Mr Stack covered the interest plus a joint endowment; Ms Dowden had another endowment in her sole name)
    • They kept finances mostly separate

Initially, the High Court decided they owned the property in equal shares. However, the House of Lords ruled that Ms Dowden was entitled to 65% while Mr Stack retained 35%. Their choice to maintain largely separate finances over 27 years of cohabitation strongly indicated they never intended an equal share.

Who Owns the Property?

There are two distinct forms of ownership to consider:

  1. Legal Title: The person(s) registered on the official copy of the title at the Land Registry.
  2. Beneficial Interests: Those who actually benefit financially from the property. More than one person can have an interest, and shares can differ from the legal title.

Four Main Ownership Scenarios

  1. Joint Purchase with a Signed Declaration of Trust
    Here, the transfer document clearly specifies how the equity (or net proceeds) will be shared upon sale or separation.

  2. Joint Purchase with a Declaration of Trust in the Transfer, But Unsigned
    In some cases, the document references beneficial interests, yet the parties never formally sign it.

  3. Joint Purchase with No Mention of Beneficial Interests, But an Agreement Exists
    The document is silent, but both parties reached a clear agreement—potentially evidenced by emails, texts, or other documentation—about their shares.

  4. Joint Purchase with No Mention of Beneficial Interests, and No Agreement
    Neither the transfer document nor any other record clarifies how the property is shared. This typically leads to disputes and requires the court to look at the parties’ conduct to infer any intended share.

Need More Advice?

Navigating property ownership as a cohabiting couple can be complicated, particularly if your relationship ends or one party dies. At HM & Co. Solicitors, we can advise on:

  • Drawing up a cohabitation agreement to protect each partner’s interests
  • Understanding beneficial ownership when property is in one or both names
  • Handling disputes and property claims if the relationship breaks down
  • Evaluating whether your arrangement resembles any of the four ownership scenarios above

Contact HM & Co. Solicitors

Our experienced family law solicitors are here to guide you through property issues, helping you feel secure and properly informed about who owns what when you cohabit.

Your Questions, Answered

FAQs

Cohabitation and Unmarried Couples FAQs

The Rise in Cohabitation and the Cohabiting Family

Living together without marrying has become increasingly common, with cohabiting couples now the fastest-growing household type in the UK. Many couples simply choose to delay or forgo marriage altogether. However, despite becoming the norm for many, the legal system has yet to catch up, leaving cohabiting partners with far fewer rights and protections than married couples.

 

Why is Cohabitation Increasing?

Changing Attitudes
Social, cultural, and economic shifts have prompted many to question the traditional path of marriage. Evolving attitudes have made cohabitation an accepted lifestyle choice, whether as a prelude to marriage or as a permanent alternative.

A Precursor—or Alternative—to Marriage
For some couples, cohabitation is a temporary step before marriage, allowing them to test compatibility or wait until they’re ready for a wedding. For others, it’s a deliberate choice that bypasses the formalities and expenses of marriage altogether.

Rising Divorce Rates
Concerns about divorce have also played a role in cohabitation’s popularity. Some people who have previously been divorced prefer cohabiting over the prospect of remarrying.

 

The Myth of Common Law Marriage

A common misconception is that if you live with your partner for a certain number of years, you become “common law” spouses with the same rights as married couples. In England and Wales, there is no such thing as a common law marriage. No matter how long you’ve lived together—or whether you have children—unmarried partners have limited legal protections if their relationship ends.

 

Marriage vs. Cohabitation: What Are Your Rights?

Limited Legal Duties
Married couples have clear legal rights governing property, finances, and responsibilities during and after marriage. In contrast, cohabiting couples:

  • Have no entitlement to maintenance
  • Cannot automatically inherit each other’s property without a will
  • Do not have a right to a share of assets (such as the family home), unless they can prove ownership through other means

Children
When unmarried parents separate, the courts do not treat them differently from married parents when deciding child arrangements. Child maintenance must still be paid, and the child’s best interests remain the priority. However, unmarried fathers only gain parental responsibility automatically if they are named on the birth certificate or through other legal measures.

 

What Are the Risks?

Without the legal framework of marriage, a relationship breakdown can be complicated—especially if one partner is financially dependent or if one owns a property outright. You might find that:

  • You have no claim on your partner’s assets, even if you contributed to them
  • There is no automatic right to maintenance to help you cope financially if you separate
  • You have fewer inheritance rights, leaving you vulnerable if your partner dies without a will

 

How Can Cohabiting Couples Protect Themselves?

Cohabitation Agreement
A cohabitation agreement (sometimes called a “living together agreement”) is a legally recognised contract between unmarried partners. It can set out arrangements for finances, property ownership, personal belongings, and other assets if the relationship ends. This agreement:

  • Offers financial protection for both partners
  • Defines who owns what and in what proportions
  • Sets provisions for children
  • Reduces the risk of disputes

Declaration of Trust
This legal document specifically addresses property ownership. It details how you and your partner share the property and sets out what should happen if it’s sold later on.

Make a Will
Unmarried partners are not automatically entitled to inherit from each other if one dies without a will. Writing a will helps ensure your partner is taken care of, alongside any children or other family members.

 

Children of Cohabiting Couples

The law treats children of cohabiting and married couples the same when deciding who they will live with after separation, or how much time they’ll spend with each parent. However, fathers in unmarried relationships do not automatically have parental responsibility (unless they are named on the birth certificate or acquire it through a legal process).

 

Speak to a Cohabitation Lawyer

Whether you’re cohabiting and want to formalise arrangements or need advice after a breakup, seeking legal counsel early is key. At HM & Co. Solicitors, we offer expert guidance on cohabitation law, helping you:

  • Draft robust cohabitation agreements
  • Resolve property disputes
  • Secure appropriate financial arrangements
  • Understand your rights and obligations regarding children

Contact HM & Co. Solicitors

Get in touch for professional advice tailored to your family’s unique situation. We’ll help you move forward confidently and securely, no matter where life takes you.

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