A Lease Assignment — also known as a Deed of Assignment of Lease — is a legal document by which a tenant (the 'assignor') transfers their entire interest in a lease to a new tenant (the 'assignee'). After a valid assignment, the assignee steps into the shoes of the outgoing tenant and becomes directly liable to the landlord for all obligations under the lease, including the payment of rent and the performance of all tenant covenants.

In England and Wales, the law governing lease assignments for commercial leases granted on or after 1 January 1996 is principally contained in the Landlord and Tenant (Covenants) Act 1995 (LT(C)A 1995). This Act fundamentally reformed the law on lease covenants by abolishing the doctrine of privity of contract for new leases. Under the old law, an original tenant remained liable on the lease for the entire term even after assigning their interest to a third party. The LT(C)A 1995 changed this: upon a valid assignment of a new lease, the outgoing tenant is automatically released from the tenant covenants from the date of the assignment.

The formality requirements for executing a Deed of Assignment are stringent under English law. Since the assignment of any lease for a term exceeding three years transfers a legal estate in land, section 52 of the Law of Property Act 1925 requires that the assignment be executed as a deed. A deed must be in writing, described as a deed, signed by the parties, witnessed (for individuals), and delivered. Failure to comply with these formality requirements means that only an equitable interest is transferred, not the legal estate.

Leases granted before 1 January 1996 — often called 'old leases' — remain governed by the old law of privity of contract, under which the original tenant retains continuing liability throughout the term. Practitioners dealing with pre-1996 leases must take particular care to advise on the ongoing liability implications for the assignor.

Our Lease Assignment template is drafted as a deed in accordance with English law, incorporates the Authorised Guarantee Agreement provisions required by LT(C)A 1995, and addresses all key matters including landlord consent, consideration, assignee covenants, indemnity obligations, and deposit arrangements.

A Lease Assignment is required whenever a commercial or residential tenant wishes to transfer their leasehold interest to a new occupier before the natural expiry of the lease. There are many common commercial and personal reasons for assigning a lease.

In a commercial context, lease assignments arise in the following situations: a business is sold and the buyer wishes to continue trading from the leased premises, requiring the lease to be assigned as part of the business sale transaction; a company relocates its operations and wishes to dispose of its existing office, retail, or industrial premises by assigning the lease to a new tenant; a company undergoes a group restructuring and the lease is transferred to a sister or subsidiary company within the same corporate group; or a sole trader or partnership dissolves, and the business lease needs to be transferred to the remaining or surviving partner or to a new business.

In a residential context, lease assignment is most commonly relevant to long residential leases of flats and apartments. A leaseholder selling their flat will assign the residue of the long lease to the buyer as part of the conveyancing transaction. Short-term residential tenancies (assured shorthold tenancies) are often not assignable without the landlord's consent, and the landlord is generally entitled to withhold consent absolutely in the case of such tenancies.

A lease assignment is distinct from a sublease or underlease. In an assignment, the tenant transfers their entire interest in the lease to the assignee, and the assignor drops out of the picture entirely (subject to any AGA). In a subletting, the tenant grants a new lease to a subtenant and remains bound to the landlord under the head lease. Tenants should always check the alienation provisions of their lease carefully to confirm whether assignment or subletting is permitted and on what conditions.

A Lease Assignment Deed should be used in any situation where a formal, legally binding document is required to transfer a leasehold interest. Where a lease contains a prohibition on assignment or requires landlord consent, the assignment must not proceed until the appropriate consent has been obtained.

A well-drafted Lease Assignment Deed for England and Wales should address the following key elements to ensure it is legally effective and protects all parties involved in the transaction.

The parties clause must identify the landlord, the assignor (outgoing tenant), and the assignee (incoming tenant) by their full legal names and addresses. In commercial leases, company registration numbers should be stated. The capacity in which each party acts must be clear.

The lease particulars clause must accurately describe the lease being assigned by reference to: the date of the original lease; the parties to the original lease; the full address of the premises; and the expiry date of the lease. Any permitted variations or licences granted since the original lease was entered into should also be noted.

The assignment operative clause is the core provision by which the legal interest is transferred. It must state clearly that the assignor assigns to the assignee all the assignor's estate, right, title, and interest in and to the lease, and that the assignee takes the lease subject to the existing obligations and covenants. The consideration — whether a premium or nil — must be stated.

The landlord's consent provisions are critical. Most leases require prior written consent, and the assignment must not take place without it. The Deed should reference the landlord's licence to assign by date and confirm that the conditions attached to that consent have been satisfied.

The Authorised Guarantee Agreement (AGA) provisions must be carefully drafted if required. The AGA must comply with section 16 of the LT(C)A 1995 and must not go beyond what the Act permits — it cannot require the assignor to guarantee the obligations of any successor to the immediate assignee.

The assignee covenants with both the landlord and the assignor to pay the rent, perform all tenant covenants, and indemnify the assignor against any claims arising from breaches on or after the assignment date. The indemnity clause running from the assignee to the assignor is particularly important where an AGA has been given, as it gives the assignor recourse if the landlord makes a demand under the AGA.