Guide on Freeports Relief for Ancillary Land in Special Tax Sites

When ancillary land can qualify for Freeports and Investment Zones SDLT relief

Land outside the main operational area can still qualify for Freeports or Investment Zones SDLT relief if it is used to provide necessary support to other land in the special tax site that already qualifies in its own right. The test looks at the actual use of the land, not simply whether it is nearby, owned with the rest of the site, or bought in the same transaction.

• Ancillary land may qualify if it supports qualifying land in a special tax site and that support is necessary.
• Examples HMRC gives include an access road for a warehouse, a car park serving a factory, and integral landscaping for an office block.
• Land does not qualify just because it is part of the same wider site, under the same title, or commercially useful.
• The key question is whether the land is operationally necessary, rather than merely helpful, convenient, or decorative.
• Use as a dwelling is excluded from ancillary land relief, so a caretaker’s flat would not qualify by this route unless another specific relief applies.

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Freeports and Investment Zones relief: when ancillary land can qualify

This page explains when land outside the main operational area can still qualify for Freeports or Investment Zones SDLT relief because it is ancillary to qualifying land. The point matters because not every part of a site is used directly for the main business activity, but some supporting land may still fall within the relief if the legal conditions are met.

What this rule is about

Freeports and Investment Zones relief can apply to land in a special tax site where the land is used in a qualifying way. The rule covered here deals with supporting land rather than the main land itself.

In practice, some land is not the factory, office, or warehouse itself, but exists to support that qualifying property. The legislation allows relief for that supporting land if its use is ancillary to other land which is in the special tax site and is itself used in a qualifying manner.

The key idea is that ancillary land does not qualify just because it is nearby or under common ownership. Its use must support qualifying land, and that support must be necessary.

What the official source says

HMRC’s manual says relief may be claimed for land if its use is ancillary to other land, provided that the other land is located in a special tax site and used in a qualifying manner.

The manual explains that land is ancillary where it is used in a way that provides support that is necessary to other land which qualifies for relief in its own right.

HMRC gives examples of ancillary use that can qualify:

• a warehouse access road
• a car park supporting a factory
• landscaping that is integral to an office block

The manual also makes two limits clear:

• the land does not qualify unless it is used in a way that is necessary to support the relevant qualifying property
• use as a dwelling is excluded from relief as ancillary land use

HMRC specifically says that a caretaker’s flat would not qualify as ancillary land unless it qualified under the separate 100% relief rule referred to elsewhere in the manual.

What this means in practice

The practical question is whether the land performs a necessary supporting function for land that already qualifies for relief. If it does, the supporting land may also qualify. If it does not, the relief is unlikely to apply merely because the land forms part of the same wider site.

This means there is an important distinction between:

• land that is operationally necessary to the qualifying use, and
• land that is convenient, desirable, or associated with the site, but not truly necessary

For example, an access road serving a qualifying warehouse may be essential to the use of that warehouse. A car park serving a factory may also qualify if it supports the factory’s operation in the required way. Landscaping may qualify where it is integral to the office block, which suggests it forms part of the functioning or required layout of the qualifying property rather than being merely decorative surplus land.

By contrast, residential use is treated differently. Even if a dwelling supports the site in a broad sense, the manual says use as a dwelling is excluded from ancillary land relief. So a caretaker’s flat is not brought in through the ancillary route unless another specific relief rule applies.

How to analyse it

A sensible way to analyse the point is to work through these questions:

• Is there other land that qualifies for relief in its own right?
• Is that other land located in a special tax site?
• Is that other land used in a qualifying manner?
• What exactly is the use of the additional land for which relief is being claimed?
• Does that use provide support to the qualifying land?
• Is that support necessary, rather than merely helpful or convenient?
• Is the land being used as a dwelling, in which case the ancillary route is excluded?

The test is use-based. The fact that land is physically close to qualifying land, acquired in the same transaction, or part of the same title does not by itself make it ancillary. The focus is on what the land is actually used for and whether that use is necessary to support the qualifying land.

It is also important to identify the land to which the ancillary land relates. The supporting land must be linked to land that already meets the conditions for relief.

Example

A company buys a site in a special tax site. The site includes a factory building, an internal access road used by delivery vehicles to reach the factory, a staff car park, and a flat for an on-site caretaker.

If the factory land is used in a qualifying manner, the access road may qualify as ancillary land because it is used to provide necessary support to the factory. The car park may also qualify if it supports the factory in the required way. The caretaker’s flat would not qualify through the ancillary land rule because use as a dwelling is excluded, even if the employer considers the flat useful for site management.

Why this can be difficult in practice

The main difficulty is deciding what counts as necessary support. HMRC’s examples are helpful, but they do not create a complete test for every type of land use.

Some supporting land will be straightforward, such as an access road without which the main building cannot function properly. Other cases are less clear. A feature may be commercially useful or part of the overall development design, but it may still be arguable whether it is necessary in the sense required by the legislation and HMRC’s interpretation.

There can also be mixed-use questions. If land serves both qualifying and non-qualifying functions, or partly supports residential use, the analysis may become more fact-sensitive. The source material provided here does not set out how apportionment or mixed-use treatment works, so that point would need to be checked against the wider legislation and guidance.

Another potential difficulty is the relationship with the separate 100% relief rule mentioned by HMRC. The manual makes clear that a dwelling cannot qualify as ancillary land merely because it supports the wider site. If a dwelling is involved, it is important to consider whether any separate rule applies rather than assuming the ancillary provision will cover it.

Key takeaways

• Ancillary land can qualify only if it supports land that already qualifies for relief in its own right.
• The support must be necessary, not just convenient or loosely connected to the main site.
• Land used as a dwelling does not qualify through the ancillary land rule.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Guide on Freeports Relief for Ancillary Land in Special Tax Sites

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