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If you hold a commercial lease and find yourself with space you no longer need, or you want to share the overheads, subletting can be a sensible route. A sublease agreement lets you pass on occupation of all or part of your premises to another business, while you remain on the hook to your own landlord under the head lease.
It sounds straightforward, but the reality is layered. You need to check what your lease actually permits, secure the right consents, and put a clear written arrangement in place with the incoming occupier. This guide walks through how sublease agreements operate in England and Wales, what a well drafted sublease typically covers, and the practical points that trip people up most often when they try to sublet commercial property without getting the basics right first.
What this document is
A sublease, sometimes called an underlease, is a new tenancy granted by an existing tenant to a third party. The existing tenant (now acting as a sublandlord) keeps their original lease with the freeholder or superior landlord in place. The new occupier, the subtenant, takes their rights from the sublandlord rather than directly from the head landlord.
In practical terms, this creates a chain: head landlord at the top, tenant in the middle, subtenant at the bottom. The sublease must sit within the terms of the head lease. It cannot last longer than the head lease, it cannot grant rights the sublandlord does not have, and it usually cannot permit uses the head lease forbids.
Most commercial leases contain an alienation clause that restricts subletting, often requiring the landlord's written consent and sometimes additional conditions such as an authorised guarantee, a rent deposit from the subtenant, or compliance with specific rent levels. Getting a sublease wrong exposes the middle tenant to forfeiture of the head lease, so the drafting and the consent process deserve proper attention.
How to use this document
Read your head lease carefully. Before anything else, pull out your existing lease and find the alienation clause. This section sets out whether subletting is allowed, whether it needs landlord consent, whether the whole or only part can be sublet, and any conditions attached. If subletting is outright prohibited, you cannot proceed without negotiating a variation.
Apply for landlord consent in writing. Where consent is required, submit a formal written request to the head landlord. Include details of the proposed subtenant, their financial position, the intended use, the rent, and the draft sublease terms. The landlord is generally under a duty not to unreasonably withhold or delay consent, but they can impose reasonable conditions.
Negotiate the sublease terms. Agree commercial points with the incoming subtenant, including rent, length, break rights, repairing obligations, service charge arrangements, and permitted use. These terms should mirror or sit comfortably within your head lease obligations so you are not left paying for something the subtenant should cover.
Decide on security of tenure. Commercial tenancies under the Landlord and Tenant Act 1954 may carry automatic renewal rights unless the parties contract out. Contracting out requires a specific notice and declaration procedure before the sublease is signed. Getting this step wrong can leave you unable to recover possession when the sublease expires.
Document, sign, and register where needed. Once consent is granted, execute the sublease (usually by deed in the form of a licence to underlet from the head landlord plus the sublease itself). Longer subleases may need registration at HM Land Registry. Keep copies of the consent, the sublease, and any side agreements somewhere you can find them.
Template · England & Wales
Sublease your commercial premises
This sublease includes optional provisions that give the head landlord additional rights when dealing with the subtenant. It can be used to sublet part of or the whole of any commercial property, including offices, shops, industrial units such as factories, warehouses and workshops, and land.
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Common questions
Q Do I always need my landlord's permission to sublet?
In almost every commercial lease, yes. The alienation clause will usually require the landlord's prior written consent before you can sublet all or part of the premises. Some leases prohibit subletting entirely, while others allow it subject to conditions. Subletting without the required consent is typically a breach of the lease and can give the landlord grounds to forfeit, so always check the wording before making any commitments.
Q What happens if the subtenant stops paying rent?
You remain liable to your head landlord for the full rent under your original lease regardless of what the subtenant does. If the subtenant defaults, you still have to pay the head rent while pursuing the subtenant for what they owe. This is why assessing the subtenant's financial standing, and sometimes taking a rent deposit or guarantee, matters so much before granting the sublease.
Q Can a sublease last longer than my own lease?
No. A sublease cannot run beyond the end of the head lease, because you cannot grant rights you do not have yourself. In practice, most subleases end at least one day before the head lease expires, which keeps the arrangement legally classed as a sublease rather than an assignment. The exact length should be negotiated with the subtenant and usually needs to fit within any conditions the head landlord imposes.
Q What is the difference between a sublease and an assignment?
With an assignment, you transfer your entire lease to someone else and usually step out of the picture (subject to any ongoing guarantee). With a sublease, you keep your original lease and create a new, shorter tenancy beneath it. Assignments move the liability onwards; subleases leave you sandwiched in the middle, still responsible to the head landlord while collecting rent from the subtenant.
Q Does the Landlord and Tenant Act 1954 apply to subleases?
It can. Business tenancies in England and Wales fall within Part II of the 1954 Act unless the parties have properly contracted out. If a sublease is inside the Act, the subtenant may be entitled to renew at the end of the term, which can complicate your own arrangements with the head landlord. Many commercial subleases are contracted out, but the procedure for doing so must be followed precisely.
Q Do I need to register the sublease anywhere?
Subleases of more than seven years generally need to be registered at HM Land Registry to take effect at law. Shorter subleases usually do not require registration, although they may still need to be noted against the superior title in certain circumstances. If you are uncertain, it is worth confirming the position before completion, because failing to register where required can affect enforceability.
Q Can the head landlord refuse consent for any reason?
Generally no. Where the lease says consent is not to be unreasonably withheld, the Landlord and Tenant Act 1988 requires the landlord to respond within a reasonable time, give written reasons for any refusal, and act reasonably. What counts as reasonable depends on the circumstances, but concerns about the subtenant's covenant strength, proposed use, or impact on the building are commonly accepted grounds.
Get the paperwork right
Get the Sublease agreement for commercial property template
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.
