A recurring question in leasehold party wall matters is whether a leaseholder proposing works to a party wall must serve a Party Structure Notice on the freeholder of the same building, particularly where a Licence to Alter has already been granted.
The issue typically arises in converted houses or purpose-built blocks where:
- A long leaseholder (with more than one year unexpired) proposes to cut into a party wall adjoining neighbouring property; and
- The freehold of the building is vested in a management company or third-party landlord.
It is sometimes asserted that because the freeholder retains ownership of the structural fabric of the building, notice must also be served on them under the Party Wall etc. Act 1996. That proposition warrants careful statutory analysis.
The Statutory Framework
Under Section 2 of the Party Wall etc. Act 1996, a building owner intending to undertake works to a party wall must serve notice upon “the adjoining owner”.
Section 20 defines an adjoining owner as:
“any owner of land, buildings, storeys or rooms adjoining those of the building owner.”
Two features of the definition are critical:
- The Act regulates relationships between adjoining premises.
- The operative word is “adjoining”.
The Act does not require notice to be served on every person with a legal interest in the structure affected. It requires notice to be served on those whose land or premises adjoin those of the building owner.
A leaseholder with more than one year unexpired qualifies as an “owner” for the purposes of the Act and is therefore capable of being a building owner.
Structural Ownership vs Adjoining Ownership Explained
In most residential leases, the structural fabric of the building, including party walls, remains vested in the freeholder. The leaseholder ordinarily has rights of support and shelter, but no proprietary right to cut into structural walls without landlord consent. That consent is typically granted by way of a Licence to Alter.
The existence of structural ownership in the freeholder, however, does not of itself make the freeholder an “adjoining owner” within the meaning of the Act.
The Act regulates interference between neighbouring premises. It does not regulate the internal landlord-and-tenant hierarchy within a single building. The landlord’s control over structural alterations arises from the lease, not from adjoining owner status under the Act.
If mere structural ownership were sufficient to trigger notice, every flat alteration involving a party wall would require service on the freeholder of the same building. That has never been the practical or legal operation of the Act.
The Spatial Test: Who Counts as Adjoining Property?
Where a first-floor leaseholder proposes to cut into a party wall separating their building from neighbouring property, the adjoining land is plainly the neighbouring premises.
The adjoining owners are therefore:
- The freeholder of the neighbouring property, and
- Any long-term leaseholders of the neighbouring property.
The freeholder of the same building does not own separate land adjoining the building owner’s land. They hold a reversionary interest in the same premises. A superior title within the same building is not an adjoining estate.
Is There a Party Structure Between Leaseholder and Freeholder?
A party wall exists where it separates buildings or parts of buildings belonging to different owners and stands on lands of different owners (or forms part of a building divided vertically).
In the scenario under discussion:
- There is no wall separating the leaseholder’s flat from the freeholder.
- There is no structure standing on the lands of different owners between them.
- The freeholder’s interest is reversionary in the same structure.
Put simply, if there is no wall dividing the leaseholder’s flat from premises separately owned by the freeholder, the Act does not require notice to be served on the freeholder for works to the party wall next door.
When Must Leaseholders Serve Notice on Freeholders?
It is accepted that a Party Structure Notice must be served on the freeholder where a leaseholder proposes works to a party structure separating their flat from the freeholder’s retained premises or common parts.
Examples include:
- Cutting into a wall separating a flat from a communal staircase;
- Altering a structural wall dividing a demise from retained roof space;
- Interfering with a party structure between a flat and landlord-controlled common areas.
In such cases, the freeholder plainly owns premises adjoining those of the building owner, and there exists a party structure separating distinct ownership interests. The Act is properly engaged.
The “Eggshell Lease” Explained
The position can be understood by reference to what might be termed the “eggshell lease” principle. A long lease may confer only limited proprietary rights, leaving the structural fabric vested in the landlord. The leaseholder’s rights are limited by the terms of the lease.
Yet the Act expressly recognises such leaseholders as “owners” capable of exercising statutory rights, including the right to cut into a party wall.
The statutory regime therefore operates alongside, not in substitution for, the proprietary regime under the lease. The freeholder’s protection within the same building lies in the lease covenants and the licensing process. The Act is aimed at regulating works that affect neighbouring premises, not internal landlord-and-tenant arrangements within the same building.
What Case Law Says About Adjoining Owners
While there is no case directly deciding this exact scenario, the courts have consistently recognised that the Act is concerned with works affecting neighbouring property and with resolving disputes between adjoining owners. It operates as a self-contained statutory code focused on relationships between neighbouring premises, rather than on internal landlord and tenant arrangements within the same building.
Interpreting the Act to require service on a freeholder simply because they retain structural ownership of the same building would therefore extend the concept of “adjoining owner” beyond its ordinary spatial meaning and go further than the statutory framework appears to contemplate.
Key Takeaways for Leaseholders and Freeholders
The Party Wall etc. Act 1996 regulates interference between adjoining premises. It does not replicate the landlord’s control over structural alterations within the same building.
Accordingly, where a long leaseholder proposes works to a party wall shared with neighbouring property, notice must be served on the owners of that neighbouring property. There is no requirement to serve notice on the freeholder of the same building merely by reason of their reversionary interest.
The position is different where the proposed works affect a party structure separating the leasehold demise from retained landlord premises or common parts. In that situation, the freeholder owns premises
As a Chartered surveying practice regulated by the Royal Institution of Chartered Surveyors (RICS), we adhere to strict professional standards and offer efficient, precise guidance tailored to complex party wall situations.
Contact James Lewis Chartered Surveyors today to speak with an experienced party wall surveyor in London and ensure your project proceeds smoothly, legally, and with complete peace of mind.
