Common Intention Constructive Trust UK (2026): Stack v Dowden and Jones v Kernott — How Courts Divide Jointly Occupied Property

A common intention constructive trust (CICT) is an equitable trust that arises when: (1) property is held in one or both parties' names; (2) the parties share a common intention (express or inferred from their conduct) that the beneficial ownership should differ from the legal title; and (3) one party has acted to their detriment in reliance on that intention. The CICT is distinct from a resulting trust (which is based purely on financial contributions at the time of purchase) and is more flexible — it can reflect the full range of the parties' dealings with the property over time: (1) THE FOUNDATIONAL CASES: (a) Lloyds Bank v Rosset [1991] AC 107 (House of Lords — Lord Bridge): established that a CICT requires either (i) EXPRESS common intention to share, evidenced by discussions between the parties at or after the time of acquisition, plus detriment; or (ii) INFERRED common intention, evidenced solely by direct contributions to the purchase price or mortgage. On the Rosset analysis, contributions to household expenses, improvements, or domestic labour did NOT create a CICT; (b) Stack v Dowden [2007] UKHL 17 (House of Lords — Baroness Hale): significantly developed the law for jointly registered property. Where property is in joint names, the starting point is equal beneficial shares. To depart from equality, the party claiming unequal shares bears the burden of showing it is 'contrary to the common intention of the parties.' A wide range of circumstances can be considered — not just financial contributions; (c) Jones v Kernott [2011] UKSC 53 (Supreme Court): extended the Stack v Dowden principles and confirmed that the court can IMPUTE a common intention where the actual intention cannot be inferred — using a 'fair and just' standard. This is the high-water mark of judicial flexibility in quantifying beneficial shares; (2) SOLE NAME CASES — MORE STRINGENT THRESHOLD: where property is in one person's name only, the Rosset threshold still applies on a more stringent basis. The non-owning party must show: (a) express common intention that they should have a beneficial interest (e.g. specific discussions at the time of purchase: 'this is our home'); plus detrimental reliance; or (b) in Oxley v Hiscock [2004] and subsequent cases, the courts have been willing to find CICT from the totality of the parties' conduct even in sole name cases — though this remains unsettled; (3) DETRIMENT: once common intention is established, the claimant must show they have acted to their detriment in reliance on the common intention. Detriment can be: (a) direct mortgage contributions; (b) making improvements to the property; (c) giving up a career or secure housing on the basis of the shared intention. Mere cohabitation without more does not constitute detriment.

Once a CICT is established, the court must quantify the beneficial shares. The approach differs between joint-names and sole-name cases: (1) JOINT NAMES — STARTING POINT OF EQUALITY (Stack v Dowden): for property registered in both parties' names, the starting point is equal beneficial shares (50:50). This presumption can be displaced by evidence of contrary common intention. In Stack v Dowden itself, Baroness Hale identified factors relevant to displacing equality: (a) financial contributions to the purchase price and mortgage; (b) individual ownership of other assets; (c) how outgoings (bills, maintenance) were paid — joint or separately; (d) discussions about ownership; (e) the purpose for which the property was bought; (f) the nature of the parties' relationship. In Stack v Dowden, the couple kept their finances scrupulously separate and Ms Dowden contributed more to the purchase — the beneficial shares were held 65:35 in her favour; (2) SOLE NAMES — QUANTIFICATION AFTER ESTABLISHING CICT: in sole name cases, once a CICT is established, shares are quantified by asking 'what would be fair having regard to the whole course of dealing between the parties in relation to the property' (per Oxley v Hiscock [2004] EWCA Civ 546, Chadwick LJ). The court looks at the whole course of conduct — not just the initial contributions; (3) IMPUTATION — JONES v KERNOTT: in Jones v Kernott [2011] UKSC 53, the Supreme Court confirmed that: (a) where it is not possible to INFER a common intention from the parties' conduct, the court may IMPUTE an intention to them — i.e. what the parties would have intended if they had addressed their minds to the matter; (b) imputation applies at the QUANTIFICATION stage (how large are the shares) not at the ESTABLISHMENT stage (whether there is a CICT at all); (c) in Jones v Kernott, the couple separated; Mr Kernott moved out; Ms Jones continued paying the mortgage alone for 14 years. Their intentions had diverged after separation. The Supreme Court imputed that Ms Jones should have a 90% share; (4) WHAT COUNTS — WHOLE COURSE OF DEALING: the 'whole course of dealing' includes: (a) mortgage and purchase contributions over the entire period of ownership; (b) improvements and renovations paid for by one party; (c) payment of running costs (maintenance, insurance, ground rent) by one party after separation; (d) one party vacating and the other remaining in sole occupation; (e) explicit or implied agreements about ownership reached at any point.

The CICT is critically important for cohabiting couples because the financial remedies available to married couples on divorce DO NOT apply to cohabitants: (1) THE STARK DIFFERENCE FROM MARRIAGE: on divorce, a married couple can seek financial orders under the Matrimonial Causes Act 1973 (s.25 — all circumstances of the case; needs; contributions; sharing). The court has very wide discretion to redistribute assets. For cohabiting couples, this does not apply — there is no general right to redistribution of assets on separation. The only way to claim a share of jointly occupied property is through: (a) CICT (as described above); (b) proprietary estoppel; (c) express declaration of trust; (d) Trusts of Land and Appointment of Trustees Act 1996 s.14 (application to the court to determine beneficial interests and order sale); (2) THE PRACTICAL RESULT: cohabiting couples who separate often find that the CICT regime gives very different results from what they expected. A partner who paid the mortgage for years but whose name is not on the title may find it difficult to establish a CICT if there were no express discussions about ownership. Conversely, a partner who made no financial contribution but took care of children and the home is not protected by the CICT (unless there is an express common intention and detrimental reliance); (3) REFORM — THE COHABITATION RIGHTS BILL: the Law Commission recommended reforms in 2007 (and subsequent consultations) to give cohabiting couples clearer property rights on separation. A Cohabitation Rights Bill has been introduced multiple times in Parliament but not enacted as of 2026. Cohabitants remain dependent on the CICT and related doctrines; (4) ON DEATH — INTESTACY AND CICT: if a cohabiting partner dies intestate, the surviving cohabitant does NOT inherit under the intestacy rules. However: (a) a CICT beneficial interest (if established) is still enforceable against the estate — the surviving cohabitant can claim the beneficial share they established under CICT; (b) a claim under the Inheritance (Provision for Family and Dependants) Act 1975 may also be available for reasonable financial provision; (5) THE SOLUTION — DECLARATION OF TRUST AND WILLS: the most reliable protection for cohabiting couples is: (a) a formal declaration of trust at the time of purchase, stating each party's beneficial share expressly; (b) mirror wills leaving their respective shares to each other. A declaration of trust eliminates the need for CICT analysis — the shares are agreed in writing from day one.

A CICT creates an equitable proprietary interest in the property that has significant implications for estate administration and IHT: (1) BENEFICIAL INTEREST IS AN ESTATE ASSET: if the deceased held property in their sole name but a third party had a CICT beneficial interest (e.g. a cohabiting partner who contributed to the mortgage), the CICT interest reduces the deceased's estate. The personal representatives must: (a) identify any CICT claims by third parties; (b) include only the deceased's net beneficial share in the IHT account (IHT400); (c) deal with the property acknowledging the third party's interest; (2) CONVERSELY — UNDISCLOSED CICT ASSETS: if the deceased contributed to property that is legally in another's name, the deceased's estate may have an undisclosed beneficial interest under CICT. PRs have a duty to identify and recover these assets. HMRC will include CICT assets in the estate for IHT if the PR discloses them (or if HMRC discovers them); (3) IHT ON CICT INTERESTS: the IHT account should include the DECEASED's beneficial share (however quantified) in any property — whether the legal title reflects that or not. If the deceased held 50% beneficial interest in a property legally in their partner's name, that 50% is an IHT asset; (4) DISPUTES ON DEATH: CICT disputes most commonly arise on death when: (a) the deceased owned property alone but the surviving cohabiting partner claims a beneficial share (the 'Stack/Kernott' argument); (b) the deceased's estate claims a beneficial share in property legally owned by another person (e.g. property in a child's name funded by the deceased parent); (c) family members challenge each other's beneficial shares in the estate property; (5) TIME LIMIT: a beneficial interest under a CICT is an equitable property interest — it is not subject to limitation by the Limitation Act 1980 while the trustee holds the property. However, once the property is sold and the proceeds distributed, a monetary claim may be subject to the 6-year limitation period for trusts (s.21 Limitation Act 1980). On death, claims against the estate should ideally be brought promptly; (6) TRUSTS OF LAND AND APPOINTMENT OF TRUSTEES ACT 1996: a CICT over land creates a trust of land governed by TLATA 1996. Any co-owner (including a CICT beneficiary) can apply to the court under s.14 for an order for sale or for a declaration of the parties' interests.

The uncertainty of the CICT doctrine makes advance documentation essential for anyone who co-owns property: (1) DECLARATION OF TRUST AT PURCHASE: the most important document is a formal declaration of trust executed at the time of purchase. It states: (a) each party's beneficial share (e.g. 50:50 or 60:40); (b) what happens if one party makes additional capital contributions in the future; (c) whether the shares are fixed or can change. A declaration of trust on SDLT Form SDLT1 is not sufficient — a separate trust deed is required. The Land Registry form TR1 has a box (Box 10) for tenancy type (joint tenants or tenants in common) but does not record the beneficial shares; (2) FORM SEV — SEVERING JOINT TENANCY: couples who are joint tenants (where the survivor automatically inherits the whole property on the other's death) should consider severance to tenants in common — using Form SEV (Notice of Severance). As tenants in common, each party's beneficial share is separately owned and can be left by will to a chosen beneficiary rather than passing by survivorship; (3) COHABITATION AGREEMENT: a formal cohabitation agreement recording: (a) the beneficial shares in the property; (b) what happens on separation or death; (c) ownership of other assets; (d) financial contributions expected from each party. A cohabitation agreement is not legally binding as a contract (unlike a prenuptial agreement after Radmacher v Granatino [2010]) but provides strong evidence of common intention and reduces CICT uncertainty; (4) MIRROR WILLS: cohabiting couples should make wills leaving their respective shares to each other — or to chosen beneficiaries. Without a will, the intestacy rules do not recognise a cohabiting partner; (5) REVIEW AFTER MAJOR EVENTS: any change in the financial arrangements (one party pays off more mortgage; one party moves out; separation) should trigger a formal review of the declaration of trust. The 'whole course of dealing' approach in Stack/Kernott means that changes in circumstances CAN shift the beneficial shares over time — keeping the trust deed up to date avoids later disputes.