Unit 2.11 Paper 1

Co-ownership for the RES Exam

Last reviewed 12 October 2026

Unit 2.11 is examined more heavily than almost any other unit in Paper 1, and it is examined precisely. Questions turn on the four unities, on how survivorship interacts with a will, and on exactly what has to happen before a joint tenancy is severed. The arithmetic of shares after a partial severance also appears regularly.

Key points

The four unities are possession, interest, title and time. Equal contribution is not a unity, and survivorship is a consequence rather than a requirement.
A tenancy in common needs only unity of possession, and the shares may be unequal.
Survivorship operates at the moment of death and overrides a will; a will cannot sever a joint tenancy.
Where a joint tenant dies, no grant is needed — a notification of death updates the register. A tenant in common’s share needs a grant and a transmission application.
Unilateral severance under the Land Titles Act needs all three steps: instrument of declaration in the approved form, service on the other joint tenants, and registration (Chan Lung Kien v Chan Shwe Ching [2018] SGCA 24).
Severance makes the parties tenants in common in equal shares, and survivorship continues between any remaining joint tenants.
Equity presumes a tenancy in common where contributions were unequal, where partners bought for a business, or where the co-owners are mortgagees.
An express declaration of shares in the transfer generally governs the beneficial interests.

Joint tenancy and tenancy in common: the basic difference

Co-ownership means two or more people holding an interest in the same land at the same time. Singapore recognises two manners of holding.

Joint tenants together own the whole. No joint tenant has a distinct share while the joint tenancy lasts, and the defining consequence is the right of survivorship: when one dies, that interest is extinguished and the survivors take the whole. Tenants in common each hold a distinct undivided share, which may be equal or unequal — 70:30, or one-third and two-thirds. There is no survivorship, so a deceased tenant in common’s share passes under their will, on intestacy, or under faraid.

“Undivided” is the word candidates stumble over. A tenant in common with a 30% share does not own 30% of the floor area; each co-owner is entitled to possession of the whole property, because the shares are shares in ownership, not physical divisions of the land.

The four unities

A joint tenancy requires all four of the following unities. If any one is missing, the parties cannot be joint tenants.

A tenancy in common requires only unity of possession. The classic distractor is “equal financial contribution”, which is not one of the unities — unequal contributions are relevant to a quite different question, namely whether equity presumes a tenancy in common in the beneficial interest. Survivorship is also not a unity; it is a consequence of joint tenancy.

Unity of possession — each co-owner is entitled to possession of the whole
Unity of interest — the interests are identical in nature, extent and duration
Unity of title — the interests arise from the same document
Unity of time — the interests vest at the same time

The right of survivorship, and why a will cannot defeat it

Survivorship operates automatically at the moment of death, before a will takes effect. That order of events is the whole answer to a large family of exam questions. Where a husband and wife hold as joint tenants and the husband’s will leaves “my half share in the house” to his son, the gift fails: the wife takes the whole by survivorship, the house never forms part of the estate, and the executor has no claim to it. Because the property is outside the estate, no grant of probate is needed to sell it; the register is updated by lodging a notification of death supported by the death certificate.

It follows that a will does not sever a joint tenancy. A joint tenant who wants their share to pass under their will must sever during their lifetime, which converts the holding into a tenancy in common. A caveat lodged by a disappointed beneficiary protects nothing, because there is no interest to protect; the registered proprietor may ask the Registrar of Titles to serve a lapsing notice on the caveator, or apply to court for its removal.

How the manner of holding is recorded and changed

For registered land the manner of holding appears on the title itself, which is why a title search showing two proprietors “as joint tenants” settles the question of what happens on death. This is also why a salesperson should read the manner of holding off the title rather than infer it from the family relationship.

For an HDB flat the change is made through HDB. HDB allows owners to change from joint tenancy to tenancy-in-common in equal or unequal shares, and from tenancy-in-common back to joint tenancy, and allows existing tenants-in-common to change their proportions; the change is made without monetary consideration, and the shares must be expressed in fractions of the same denominator adding up to one. Owners may appoint their own solicitors or have HDB act for them. The CPF Board has no role in changing the manner of holding.

Severance: the statutory route and the common law routes

Severance ends the right of survivorship. For registered land, the Land Titles Act provides a unilateral route: a joint tenant may sever without the others’ consent. The Court of Appeal in Chan Lung Kien v Chan Shwe Ching [2018] SGCA 24 read sections 53(5) and 53(6) as a single mode of severance made up of three steps, all of which are necessary: execute an instrument of declaration in the approved form; serve it personally or by registered post on the other joint tenants; and register it. An instrument that is served but never registered does not sever the joint tenancy at all, and on that point the court held that the earlier decision in Diaz could not be supported. Once registered, the declarant holds as tenant in common with the remaining joint tenants, in an equal proportion to each of them.

The common law methods recognised in Williams v Hensman remain available: an act of one joint tenant operating on their own share, mutual agreement, and a course of dealing showing that the co-owners treated their interests as held in common. The first of these explains the standard exam scenario in which one of three joint tenants sells their interest to a stranger: the transfer breaks the unities of title and time as to that share, so the buyer takes a one-third share as tenant in common while the other two, whose unities are intact, continue as joint tenants of the remaining two-thirds between themselves. If one of those two then dies, survivorship operates between them and the survivor ends up with two-thirds.

When equity presumes a tenancy in common

Legal title and beneficial ownership can differ. Even where co-owners hold as joint tenants at law, equity presumes a tenancy in common in the beneficial interest in three classic situations, because survivorship is regarded as inappropriate there: where the co-owners contributed unequally to the purchase price, where partners acquired the property for their business, and where the co-owners are mortgagees who lent the money. Where the presumption applies, the surviving joint tenant takes the legal title by survivorship but holds the deceased’s beneficial share on trust for the deceased’s estate.

Two limits matter. A married couple who contribute equally to their home fall into none of these categories, so a joint tenancy at law will ordinarily be reflected in equity. And where the co-owners expressly declared their shares in the transfer, that express declaration generally governs, even if the contributions were unequal — which is why it is better to state the shares at law when registering than to rely on a presumption.

One further point on trustees: trustees hold the legal estate as joint tenants, so on the death of one trustee the legal title passes to the survivors. That affects only the trustees’ legal title; the beneficiaries’ interests are untouched, because the deceased trustee had no beneficial share to leave by will.

Terms to know

Joint tenancy: Co-ownership in which the owners together hold the whole, with the four unities present and the right of survivorship applying.
Tenancy in common: Co-ownership in which each owner holds a distinct undivided share, which may be unequal, with no right of survivorship.
Right of survivorship: The rule that on the death of a joint tenant, their interest is extinguished and the surviving joint tenants take the whole.
Four unities: Possession, interest, title and time — all required for a joint tenancy.
Severance: Converting a joint tenancy into a tenancy in common, which ends the right of survivorship.
Instrument of declaration: The approved form used to sever a joint tenancy unilaterally, which must be served on the other joint tenants and registered.
Notification of death: The lodgment by which the register is updated when a joint tenant dies and the survivor takes by survivorship.
Undivided share: A share in the ownership of the whole property rather than in a physical part of it.

Frequently asked questions

Can one joint tenant sever a joint tenancy without the other’s consent?

Yes. The Land Titles Act provides a unilateral route, and the other joint tenant’s consent is not required. But all three statutory steps must be completed: an instrument of declaration in the approved form, service on the other joint tenants personally or by registered post, and registration. An unregistered instrument does not sever.

What happens to the shares after severance?

The parties become tenants in common in equal shares, and the right of survivorship ends between them. Where there were three joint tenants and one severs, that person holds a one-third share as tenant in common while the other two continue as joint tenants of the remaining two-thirds between themselves.

Which is better for a couple, joint tenancy or tenancy in common?

They do different things, and the syllabus treats this as a question of what the owners want rather than what is better. Joint tenancy gives each owner an equal interest and passes the whole to the survivor automatically. Tenancy in common allows unequal, specified shares and lets each owner’s share pass under their own will or the applicable succession rules.

Does a tenant in common with a 30 per cent share own 30 per cent of the flat?

No. Shares held by tenants in common are undivided shares in the ownership of the whole property, not physical portions of it. Each co-owner is entitled to possession of the whole, and the share determines entitlement to proceeds and what passes on death rather than which rooms belong to whom.

How is the manner of holding changed for an HDB flat?

Through HDB. Owners may change from joint tenancy to tenancy-in-common in equal or unequal shares, or the other way, and existing tenants-in-common may change their proportions. The change is made without monetary consideration, the shares must be in fractions of the same denominator adding up to one, and owners may use their own solicitors or have HDB act for them.

Official sources

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