Understanding Commonhold: Ownership, Registration, and Tax Implications Under 2002 Reform Act

SDLT and Commonhold Registration

In England and Wales, creating or converting property into commonhold can amount to a land transaction for SDLT, because ownership interests may arise by operation of law. However, HMRC says SDLT is often not payable because there is usually no chargeable consideration, although connected-party company cases may trigger a market value rule.

• Registering a commonhold unit to a unit-holder, or common parts to the commonhold association, is generally treated as a land transaction for SDLT.
• In most cases, no SDLT is due because those transactions usually involve no chargeable consideration.
• If a lease ends when a unit is registered to the leaseholder on conversion, that lease ending is not treated as consideration because it happens by operation of law.
• Payments made only to obtain consent for a commonhold conversion are not treated by HMRC as consideration for a land transaction.
• Registering a new development as commonhold before any units are sold is not a land transaction, and cancelling that status before any sale is also not a land transaction.
• Where the transferee is a company or other body corporate connected with the transferor, market value may be deemed as consideration, although HMRC accepts the common parts held by a commonhold association usually have negligible market value.

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SDLT and commonhold: when registration creates a land transaction and when it does not

This page explains how Stamp Duty Land Tax applies when property is held or converted into commonhold in England and Wales. The main point is that commonhold registration can create land transactions for SDLT purposes, but in many cases there is no chargeable consideration, so no SDLT is payable. The detail matters because the legal mechanics of commonhold are unusual: interests can arise or end by operation of law rather than by an ordinary transfer.

What this rule is about

Commonhold is a form of freehold ownership used for developments with shared areas, such as blocks of flats. Each unit-holder owns the freehold of their own unit. The shared parts, such as corridors, staircases and lobbies, are owned and managed by a commonhold association.

It was introduced by the Commonhold and Leasehold Reform Act 2002 and applies only in England and Wales.

For SDLT, the key question is whether the steps involved in creating or operating a commonhold amount to a “land transaction”, and if so, whether there is any chargeable consideration. SDLT is generally charged on land transactions involving chargeable consideration, so both parts of that question matter.

What the official source says

HMRC’s manual says that the following are land transactions because they involve the acquisition of a chargeable interest by operation of law:

• registration of the common parts in the name of the commonhold association
• registration of a unit in the name of a unit-holder

HMRC also says that these land transactions will generally involve no chargeable consideration.

The main exception identified by HMRC is where the transferee is a company or other body corporate connected with the transferor for the purposes of section 1122 of the Corporation Tax Act 2010. In that situation, section 53 of Finance Act 2003 can deem the consideration to be the market value of the interest transferred.

HMRC adds an important practical point for commonhold associations: where the common parts are acquired by the commonhold association in those connected-party circumstances, HMRC accepts that the market value of the common parts is negligible. The reason given is that the association cannot deal with the common parts for profit and must maintain and insure them.

The manual also distinguishes “registration without unit-holders”, which is the form used for new developments before any units are sold. HMRC says that this is not a land transaction. Nor is it a land transaction if land that has been registered as commonhold without unit-holders stops being so registered before any units are sold.

Where an existing development is converted to commonhold, all unit-holders and any landlord must consent. HMRC says that a payment made to obtain that consent is not chargeable consideration for a land transaction.

Finally, if a lease held by a unit-holder is extinguished when the unit is registered in that person’s name, HMRC says this is not an exchange. The lease ends by operation of law, so its extinguishment is not consideration for the registration.

What this means in practice

The practical position is often more favourable than the phrase “land transaction” might suggest.

In a commonhold conversion, SDLT analysis does not stop once you identify that a land transaction has occurred. You must also ask whether there is any chargeable consideration. According to HMRC’s view, there usually is not.

That means:

• the registration of a unit-holder as freehold owner of their unit may be a land transaction, but often with no chargeable consideration
• the vesting of common parts in the commonhold association may also be a land transaction, but again often with no chargeable consideration
• the end of an existing lease on conversion does not itself provide consideration
• payments made simply to secure the necessary consent to conversion are not treated as consideration for a land transaction

For new developments, the position is different at the pre-sale stage. Merely registering land as commonhold before any units are sold is not itself a land transaction. So that initial registration step does not trigger SDLT simply because the development has been put into commonhold form.

The connected-company rule is the main point that can alter the outcome. If the transferee is a connected company or body corporate, market value can be substituted as deemed consideration. Even then, HMRC accepts that the common parts held by the commonhold association have negligible market value in these circumstances.

How to analyse it

A sensible way to approach the SDLT position is to ask the following questions.

• Is this a commonhold in England and Wales?
• Is the step in question a registration of a unit to a unit-holder, a registration of common parts to the commonhold association, or merely registration without unit-holders?
• Does the interest arise by operation of law, so that it counts as an acquisition of a chargeable interest?
• Is there any actual chargeable consideration being given for that land transaction?
• If not, does a market value rule apply because the transferee is a company or body corporate connected with the transferor?
• If the common parts are being vested in the commonhold association, is HMRC’s view that their market value is negligible relevant on the facts?
• Are any payments being made merely to obtain consent to conversion, rather than for the transfer of a chargeable interest?
• Is an existing lease simply being extinguished by operation of law, rather than being exchanged for another interest?

This framework helps separate three different issues that are easy to confuse:

• whether there is a land transaction at all
• whether there is chargeable consideration
• whether a deemed market value rule overrides the absence of actual consideration

Example

A block of flats is currently held under long leases. The owners agree to convert the building to commonhold. Each flat owner becomes the freehold owner of their own unit, and a commonhold association takes ownership of the corridors, entrance hall and staircases.

On HMRC’s approach, the registration of each unit and the registration of the common parts are land transactions because chargeable interests are acquired by operation of law. But there will generally be no chargeable consideration. The old leases ending on conversion do not count as consideration, because they are extinguished by operation of law. If one leaseholder pays another person simply to obtain the consent needed for the conversion, HMRC says that payment is not chargeable consideration for a land transaction.

If the common parts are vested in a connected company or body corporate so that the market value rule is potentially in point, HMRC accepts that the market value of those common parts in the hands of the commonhold association is negligible.

Why this can be difficult in practice

The difficulty is that commonhold does not always fit the usual SDLT pattern of a buyer paying a seller under a transfer document. Rights can arise or end automatically under the statutory scheme. That makes it easy to assume either that SDLT cannot apply at all, or that it must apply because ownership has changed. Neither shortcut is reliable.

Several points are especially fact-sensitive:

• whether a payment is truly for consent only, or is in substance consideration for a transfer of land
• whether the connected-party market value rule applies, which depends on the statutory test for connection
• whether a particular registration step is one that HMRC treats as a land transaction, as opposed to a non-transactional registration without unit-holders

It is also important to distinguish HMRC’s manual view from the legislation itself. The manual explains how HMRC applies the SDLT rules to commonhold, including HMRC’s acceptance that the market value of common parts held by the commonhold association is negligible. That is a practical and important statement of HMRC’s position, but it should still be understood as HMRC guidance on how the legislation operates.

Key takeaways

• In a commonhold conversion, registration of units and common parts can be land transactions for SDLT even though the interests arise by operation of law.
• Those transactions will generally have no chargeable consideration, and the ending of an old lease on conversion is not treated as consideration.
• Pre-sale registration of a new development as commonhold without unit-holders is not a land transaction, and connected-party cases need separate attention because market value may be deemed.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Understanding Commonhold: Ownership, Registration, and Tax Implications Under 2002 Reform Act

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