Commercial leases do not always run their full course with the original tenant. Businesses relocate, expand, downsize, restructure, or sell their operations. When this happens, assigning or subletting a commercial lease can provide flexibility, but it is rarely as simple as handing over the keys.
Both tenants and landlords must understand the legal and commercial implications before assigning or subletting. A poorly structured arrangement can lead to disputes, unexpected liabilities, and financial losses.
In this article, we explain the key differences between assigning a commercial lease and subletting, when landlord consent is required, and the risks businesses should be aware of.
What Is an Assignment of a Commercial Lease?
An assignment is when a tenant transfers all of its rights and obligations under a lease to a third party.
Once the assignment is completed, the new tenant (known as the assignee) becomes responsible for complying with the tenant covenants in the lease. Whilst the outgoing tenant is generally released from future liability under the Landlord and Tenant (Covenants) Act 1995, landlords will frequently require an Authorised Guarantee Agreement (AGA) as a condition of consent.
For example, a retail business operating from leased premises may sell its business to a new owner. As part of the transaction, the lease may be assigned so that the new owner can continue trading from the same premises.
Key features of an assignment:
- The entire lease is transferred
- The outgoing tenant usually leaves the property altogether
- The assignee becomes responsible for rent and other lease obligations
- Landlord consent is often required
What Is Subletting?
Subletting is different. Rather than transferring the lease entirely, the existing tenant grants a new lease to another occupier while remaining the tenant under the head lease.
This means there are two separate legal relationships:
- The landlord and the original tenan
- The original tenant and the subtenant
For example, a business occupying a large office may only require half the space following a restructure. It may decide to sublet the unused space to another company whilst continuing to occupy the remainder.
Key features of a subletting arrangement:
- The tenant retains responsibility under the main lease
- The tenant becomes a landlord to the subtenant
- The subtenant pays rent to the tenant, not directly to the superior landlord
- Restrictions in the head lease will usually apply
Does Landlord Consent Need to Be Obtained?
In most commercial leases, a tenant cannot freely assign or sublet without complying with the lease provisions.
Typically, a lease will require the landlord’s consent before any assignment or subletting takes place. This consent is often referred to as a Licence to Assign or Licence to Underlet.
The Landlord and Tenant Act 1988 provides important protections for tenants where landlord consent is required. Where a lease states that consent cannot be unreasonably withheld, a landlord must generally:
- Deal with the application within a reasonable time
- Give consent unless there is a reasonable ground for refusal
- Provide written reasons if consent is refused
However, whether a refusal is reasonable will depend on the particular facts.
Common reasons landlords may refuse consent include:
- Concerns about the financial strength of the proposed assignee or subtenant
- A poor trading history
- Proposed use of the premises breaching lease terms
- Existing breaches of covenant by the outgoing tenant
- Failure to provide sufficient information to support the application
What Information Will a Landlord Usually Require?
A landlord will commonly request:
- Up-to-date accounts
- Bank and trade references
- Details of the proposed occupier’s business
- Confirmation of the intended use of the premises
- Identification documents and anti-money laundering information
- Details of any guarantor being offered
Providing comprehensive information at the outset can significantly reduce delays in obtaining consent.
Why Legal Advice Matters
Assigning or subletting a commercial lease involves much more than obtaining the landlord’s consent. The terms of the existing lease, the wording of any licence, and the obligations placed on the parties can all have lasting legal and financial consequences.
A solicitor can review the lease, explain any restrictions, negotiate the terms of a Licence to Assign or Licence to Underlet, and identify issues such as guarantee obligations, repair liabilities and ongoing responsibilities before agreements are signed.
Early legal advice can also help prevent unnecessary delays where a wider business sale or relocation depends on the transaction completing on time.
Authorised Guarantee Agreements (AGAs)
Often outgoing tenants do not consider the possibility that they may be required to enter into an Authorised Guarantee Agreement (AGA).
An AGA is commonly requested on the assignment of a lease. It requires the outgoing tenant to guarantee the performance of the assignee’s obligations.
This means that if the assignee fails to pay rent or otherwise breaches the lease, the former tenant may still face liability.
For businesses seeking a clean break from leased premises, this can come as an unwelcome surprise.
Risks Associated with Assignments
Before assigning a lease, tenants should carefully consider:
Continuing Liability
Although the Landlord and Tenant (Covenants) Act 1995 generally releases tenants from future liability following assignment, AGAs can significantly alter the position.
Dilapidations Exposure
Landlords may refuse consent until existing breaches are remedied. Outstanding repair obligations frequently become an issue during assignment negotiations.
Transaction Delays
Obtaining landlord consent, negotiating licence documentation, and carrying out financial checks on the proposed assignee can take longer than anticipated.
Impact on Business Sales
Where a business sale depends on the transfer of premises, delays or refusal of consent may jeopardise the wider transaction.
Risks Associated with Subletting
Subletting can be a useful way to reduce property costs, but it carries its own risks.
Ongoing Lease Obligations
Even if the subtenant fails to pay rent, the head tenant remains fully responsible to the landlord.
Rent Discrepancies
Many commercial leases restrict subletting below market rent. A tenant seeking to fill vacant space quickly may discover that the lease limits its options.
Management Responsibilities
The head tenant effectively becomes a landlord and may need to deal with rent collection, repairs, insurance issues, and potential disputes.
Sublease Restrictions
Most commercial leases require any underlease to be granted on specified terms. For example, a landlord may prohibit subletting part only, require the underlease to be excluded from security of tenure under the Landlord and Tenant Act 1954 or prohibit the grant of a sublease at less than market rent.
Potential for Vacant Space
If a subtenant becomes insolvent or leaves early, the original tenant may be left with empty premises and ongoing rent liabilities.
Practical Steps Before Proceeding
Whether assigning or subletting, businesses should take the following steps:
- Review the lease carefully.
- Identify any restrictions or conditions.
- Obtain legal advice at an early stage.
- Prepare financial information for the proposed occupier.
- Allow sufficient time for landlord approval.
- Consider whether an AGA may be required.
- Assess repair obligations and dilapidation risks.
A landlord should also carry out appropriate due diligence before granting consent and ensure that security arrangements adequately protect its position.
Conclusion
Whether assigning a lease or granting a sublease, both landlords and tenants should understand the restrictions contained within the lease and the potential liabilities that can continue long after a transaction completes. Proper planning and early legal advice can minimise delay, reduce risk and help ensure the transaction proceeds smoothly
How Ison Harrison Can Help
Assignments and subletting arrangements can have significant legal and financial consequences for both landlords and tenants. Understanding lease restrictions, negotiating landlord consent, and managing ongoing liabilities are essential to protecting your position.
At Ison Harrison Solicitors, our Commercial Property team advises landlords, tenants, developers and investors on all aspects of commercial lease management. Whether you are seeking to assign a lease, sublet premises, or respond to a consent request, we can provide practical and commercially focused advice tailored to your circumstances.
For expert guidance and a no-obligation discussion about your commercial property requirements, contact the Commercial Property team at Ison Harrison today.
Call us on 0113 284 5000 or email commprop@isonharrison.co.uk for more information.
