By Sital Somaiya, Founder and Solicitor. Last reviewed 15 October 2026.
Key points
- Proprietary estoppel stops someone going back on a promise about property where it would be unfair because you relied on it.
- You must show an assurance, that you relied on it, that you suffered a detriment as a result, and that it would be unconscionable to let your partner go back on it.
- It is often argued alongside a constructive trust claim when the home is in one partner’s name.
- The court has a wide choice of remedy, from transferring the house to a sum of money. It does not always give you exactly what was promised.
“This will be your home too.” “Don’t worry, half of it’s yours.” “You’ll never have to leave.” Partners say these things all the time. When the relationship ends and the house is in one name, the question is whether the law will hold them to it.
Most guides to proprietary estoppel are about farms and inheritances. This one is about couples, where the promise is about the family home and the person relying on it is a partner. If the home is in your partner’s name, our TOLATA checker gives a quick indication of where you stand.
In this guide
- What proprietary estoppel means
- The four things you must show
- A worked example: a home in your partner’s name
- Cases that shaped the law for couples
- What a court can award
- Proprietary estoppel or a constructive trust?
- Is there a time limit?
- Evidence to gather now
- What to do next
- Frequently asked questions
- Talk to us
What proprietary estoppel means
Estoppel means being prevented from going back on something. Proprietary estoppel applies to land and property. If the owner leads you to believe you have, or will get, an interest in their property, and you act on that belief to your cost, the court can stop them denying it when that would be unconscionable.
Parliament has confirmed that the right this creates is a property right, not just a personal claim. Section 116 of the Land Registration Act 2002 says so for registered land, which means it can in principle bind a later buyer or lender.
The four things you must show
| Element | What it means | Examples in a relationship |
|---|---|---|
| Assurance | Your partner said or did something that led you to believe you had, or would have, a share in the home. Silence while knowing you held that belief can be enough. | “The house is yours as much as mine.” Telling you not to worry about not being on the deeds. Encouraging you to treat it as your own. |
| Reliance | You acted because of that assurance. It need not be the only reason. | Giving up your own tenancy or home to move in. Putting savings into the house. Not buying somewhere yourself. |
| Detriment | Acting on the assurance left you worse off in a way that is substantial, judged across the whole relationship. | Selling your flat. Paying for an extension. Giving up work to care for the family on the understanding the home was secure. |
| Unconscionability | In all the circumstances, it would be unfair to let your partner go back on what they said. | They have taken the benefit of your money or work and now say you have no claim. |
These elements overlap and the court looks at the story as a whole. Once you have shown an assurance and conduct that could have been prompted by it, the court will often presume you relied on it, and your partner then has to show you did not.
A worked example: a home in your partner’s name
An example
Dev owned a house in Harold Wood before he met Priya. When she moved in, she gave up a secure council tenancy. Over the next nine years she paid for a new kitchen and loft conversion from her savings, around £35,000 in total, while Dev paid the mortgage. Dev repeatedly told her the house was “ours” and that he would put her on the deeds “when the remortgage comes up”. He never did. They have now separated and Dev says the house is his.
Priya has a credible proprietary estoppel claim: clear assurances, reliance and substantial detriment, including losing her tenancy. She may also have a constructive trust claim on the same facts. What the court would award depends on what was promised and what she gave up.
This is an illustrative example, not a real case.
Cases that shaped the law for couples
| Case | What happened | Why it matters |
|---|---|---|
| Pascoe v Turner (1979) | A man told his partner the house and everything in it were hers. Relying on that, she spent her own money on repairs and improvements. | The court ordered the house to be transferred to her. A promise about the home can lead to the whole house. |
| Greasley v Cooke (1980) | A woman cared for a family for years after being told she could stay in the house for life. | Once an assurance is shown, the court can presume reliance. The burden shifts to the owner. |
| Wayling v Jones (1993) | A man worked for his partner’s business for low pay, relying on promises he would inherit a hotel. | Reliance can be presumed in a relationship. The promise does not need to be the only reason for what you did. |
| Gillett v Holt (2000) | Repeated assurances over decades about inheriting a farm. | Detriment is judged across the whole relationship, and assurances can be revocable in form but still binding. |
| Thorner v Major (2009) | Hints and conduct, not express words, about a farm. | An assurance can come from conduct and oblique remarks if it was meant to be relied on. |
| Southwell v Blackburn (2014) | A woman gave up her secure home to move in with her partner, who assured her of security. | She received a lump sum reflecting what she had given up, rather than a share of the house. |
| Guest v Guest (2022) | A son worked on the family farm for decades on promises of inheriting part of it. | The Supreme Court’s current approach to remedies: start with the promise, then adjust so the result is not out of all proportion. |
What a court can award
The court decides how to put right the unfairness, and it has a wide choice. The options include transferring the house or a share of it to you, a right to live there, or a sum of money.
Since Guest v Guest in 2022, the court’s starting point is usually to fulfil the promise or give its value in money. It then adjusts that, for example to reflect that you are receiving something earlier than promised, or because giving you everything would be out of all proportion to what you gave up. In couple cases, courts sometimes award a sum based on the detriment, as in Southwell v Blackburn, where the promise was vague or the full promise would be unfair the other way.
Proprietary estoppel or a constructive trust?
They often run together, and your solicitor may argue both. The difference is mainly in the remedy.
| Common intention constructive trust | Proprietary estoppel | |
|---|---|---|
| Focus | A shared intention that you would both own the home | A promise or assurance you relied on to your cost |
| What you get if you win | A share of the home, quantified by the court | Whatever the court decides is needed to put things right, which may be more or less than a share |
| Typical evidence | Discussions about ownership, contributions to the purchase or mortgage | Specific assurances, plus what you gave up because of them |
| More detail | Our constructive trusts guide | This guide |
Is there a time limit?
There is no fixed time limit written into the law for a proprietary estoppel claim. But the remedy is equitable, which means the court can refuse or reduce it if you have delayed unreasonably and that has caused unfairness. Memories fade and documents go missing, so act soon after the relationship ends.
Evidence to gather now
- Messages, emails and cards in which your partner talked about the home being yours, ours, or promised you a share
- Bank statements showing what you paid, especially for improvements, the deposit or capital payments
- Proof of what you gave up, such as a tenancy surrender letter, the sale of your own property, or leaving a job
- Witnesses who heard your partner make the assurances, such as family or friends
- A timeline you write now, while events are fresh, of when each promise was made and what you did next
What to do next
Do not move out or sign anything about the house before taking advice. If your partner is selling or remortgaging, speak to a solicitor quickly, as you may be able to protect your position at HM Land Registry. Our guide to beneficial interests in property explains how, and our guide to what happens when your partner’s name is on the deeds covers the wider picture.
Frequently asked questions
Can I claim proprietary estoppel if we were never married?
Yes. Proprietary estoppel does not depend on marriage or any particular relationship. It depends on an assurance about property, your reliance on it and the detriment you suffered.
Does the promise have to be in writing?
No. Most successful claims are based on things said out loud, or on conduct. Written evidence such as texts or emails makes a claim much easier to prove.
I paid the bills, not the mortgage. Does that count?
It can count as detriment if you paid them because of an assurance about the home, especially where it freed your partner to pay the mortgage. On its own, paying household bills is weaker evidence than paying for the property itself.
Will I get the whole house if I win?
Not necessarily. The court starts with what you were promised but can award less, for example a share or a sum of money, if giving you everything would be out of proportion to what you gave up.
Can I bring a claim if my partner has died?
Yes. Many proprietary estoppel claims are brought against an estate. Time can be important in those cases, so take advice promptly.
Sources
- Land Registration Act 2002, section 116, legislation.gov.uk
- Guest v Guest, [2022] UKSC 27, BAILII
- Thorner v Major, [2009] UKHL 18, BAILII
Talk to us
Signature Law acts for partners making and defending property claims in Romford, Essex and East London. Check your position with our TOLATA checker or speak to our cohabitation solicitors.
Request a callback, or call 01708 398 851.
