Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Underlease definition

What does Underlease mean? An underlease (sublease) is a lease granted by a tenant (the sub‑landlord or intermediate landlord) to a sub‑tenant out of the tenant’s own leasehold, rather than by the freeholder. It is carved out of, and strictly subject to, the headlease: it cannot run for longer than, or confer greater rights than, the headlease. In practice, the underlease term is often one day shorter than the residue of the headlease. Key features and risks: - Typically requires the head landlord’s consent where the headlease contains an alienation covenant; underletting without consent can be a repudiatory breach and expose the headlease to forfeiture. -...

Headlease Termination and Underleases: Surrender/Merger and Regrant, Break Clauses, Expiry, Forfeiture and Relief, LTA 1954 and Assured Tenancy Protections (England and Wales)

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Practice notes

The basic rule at Common law is that when the term of a lease expires, any Underlease falls away automatically. There are, nonetheless, recognised exceptions. This Practice Note addresses Surrender, merger, surrender coupled with the grant of a fresh lease, operation of a break in a lease or headlease, tenant-side considerations, security of tenure, forfeiture of a lease or headlease, and whether a sub-tenant or undertenant can apply for relief from forfeiture.

Consensual termination—surrender or merger

Statute steps in upon the surrender of a lease. As a consensual ending, the tenant’s estate is treated as transferring to the Landlord, but subject to the undertenant’s rights. A merger has the same effect. The underlease continues, and the landlord assumes both the benefits and burdens of the covenants in the underlease.

Consensual termination—surrender and grant of new lease

The same position applies where the lease is surrendered, whether by deed or by implied surrender, in order to grant a new lease. The tenant, or a new tenant, has same rights against the undertenant, and the undertenant retains the same rights under the underlease as if original lease had never been surrendered. The landlord has the same rights to use commercial rent arrears...

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Web page updated on 21/05/2026

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Date [ date ] Parties [ name of Landlord ] [ of OR incorporated in England and Wales (company registration number [ number ]) with its registered office at ] [ address ] (Landlord) [ name of Tenant ] [ of OR incorporated in England and Wales (company registration number [ number ]) with its registered office at ] [ address ] (Tenant) [ [ name of Guarantor ] [ of OR incorporated in England and Wales (company registration number [ number ]) with its registered office at ] [ address ] (Guarantor) ] [ [ name of Mortgagee ] [ of OR incorporated in England and Wales (company registration number [ number ]) with its registered office at ] [ address ] (Mortgagee) ] Definitions Within this Deed, the terms below shall be interpreted as follows: [ Annual Rent • the annual sum reserved under the Lease; ] [ Insurance Rent • the Tenant’s share of the Landlord’s costs of insuring the Property (as set out in the Lease); ] Lease • the lease of the Property dated [ date ], entered into between (1) [ the Landlord OR [ name ...

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