Can you enforce a verbal promise about property?

Can you enforce a verbal promise?

It’s surprisingly common for family members to make informal promises about property — “this house will be yours one day” or “you’ll inherit part of the farm.”

However, what happens when those promises are broken? Can a verbal promise actually be enforced in law?

The short answer — sometimes, yes. But only in specific circumstances.

When does a verbal promise become legally binding?

In most situations, agreements about land or property should be in writing to be legally enforceable. However, the courts recognise that strict legal rules don’t always reflect real life — especially within families. That’s where a legal principle called proprietary estoppel comes in.

What is proprietary estoppel?

Proprietary estoppel is a legal doctrine that can prevent someone from going back on a promise about property — even if that promise was never written down.

To succeed in a claim, three key elements must be proven:

1. A clear promise (representation): There must be a clear assurance or understanding that you would receive some right or interest in property.
2. Reliance on that promise: You must have acted based on that promise — for example, making life decisions or financial sacrifices.
3. Detriment: Your reliance must have caused you some disadvantage or loss, making it unfair (or “unconscionable”) for the promise to be broken.

If all three are present, a court may step in to enforce the promise.

Real example: a family farm dispute

A leading UK case illustrates how this works in practice.

A son spent over 30 years working on his parents’ farm after being repeatedly told he would inherit a substantial share. During that time, he earned very little and built his life around that expectation.

However, after a breakdown in family relations, his parents removed him from their wills. He brought a claim based on proprietary estoppel — arguing that he had relied on their promises to his detriment.

What did the court decide?

The courts agreed that the son had been treated unfairly and that the legal test for proprietary estoppel was met.

Initial decision

The trial judge awarded him a financial settlement reflecting his expected inheritance. This was intended as a “clean break” — resolving matters immediately rather than waiting for the parents’ deaths.

Appeal and Supreme Court outcome

The case eventually reached the Supreme Court, which largely upheld the decision — but added an important twist. The parents were given a choice:

• Option 1: Put the farm into a trust, allowing them to live there but ensuring the son would ultimately benefit
• Option 2: Pay a lump sum now (with a reduction to reflect early payment)

This flexible approach shows how courts aim to balance fairness between the parties.

“Mike was so helpful and professional and really spent time giving me so many options for ways forward.”

What this means for you

If you’ve relied on a verbal promise about property — especially within a family — you may still have a legal claim. However, these cases are highly fact-specific. Courts will look closely at:

• What exactly was promised
• How you relied on it
• What you gave up or lost as a result

How to protect yourself

Relying on verbal promises is always risky. If property or significant assets are involved, it is far safer to:

• Get agreements in writing
• Ensure wills are up to date
• Seek legal advice early

Taking these steps can prevent disputes — and costly litigation — later on.

In a nutshell…

Verbal promises about property can sometimes be enforced, but only where fairness demands it. Proprietary estoppel exists to prevent serious injustice — not to uphold every informal agreement.

If you think you may have a claim or want to avoid future disputes, getting clear legal advice is essential.

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