Subletting part or all of a business lease: consent, the lease terms and the 1954 Act

By Instrukt, published by Joshua Giles. Updated 2 November 2026. How we write guides

Not legal advice. This page has not been reviewed by a solicitor.

The short answer

As of November 2026, a tenant who wants to sublet a business lease usually needs the landlord’s consent if the lease requires it, and the landlord must not unreasonably withhold consent. A sublease can be contracted out of the Landlord and Tenant Act 1954 only by an agreement made before it is granted, with the statutory notice served.

What do the lease restrictions on subletting cover?

The RICS Code for leasing business premises makes good-practice recommendations, not mandatory rules, on subletting. It recommends that leases allow corporate tenants to share premises with other companies in the same group without creating a subletting (Part 3, para 6.3), and that they allow a sublease of the whole, with consent not to be unreasonably withheld or delayed, at not less than market rent, and generally on terms consistent with the tenant’s own lease (para 6.4). Landlords may impose stricter provisions where the circumstances justify it (para 6.6). The Code’s scope excludes premises that are intended to be wholly sublet by the tenant (RICS Code, Part 1).

The restrictions that bind you are those in your lease, not the Code. Read the subletting clause, and check whether it requires consent, which parties may take a sublease, and what the consent process is, before you approach the landlord. A covenant against underletting without consent is deemed subject to a proviso that consent is not to be unreasonably withheld (Landlord and Tenant Act 1927, section 19(1)(a)), and the section 1 duties apply to a covenant qualified in that way (section 1(1)).

Does the Landlord and Tenant Act 1954 protect a subtenant?

It can. The 1954 Act defines a “tenancy” to include one created “derivatively out of the freehold, whether by a lease or underlease” (section 69(1)). A sublease is therefore within the Act’s definition of a tenancy. The Act applies where the subtenant occupies the premises for the purposes of its business (section 23(1)), unless the sublease is contracted out.

A sublease can be contracted out by agreement. Under section 38A, the persons who will be landlord and tenant of a tenancy to be granted for a term of years certain may agree that sections 24 to 28 are excluded. That agreement is void unless the landlord has served the tenant a notice in the form, or substantially in the form, set out in Schedule 1 to the Regulatory Reform (Business Tenancies) (England and Wales) Order 2003, and the requirements in Schedule 2 to that Order are met (section 38A(1) and (3)).

The notice must be served on the tenant, here the subtenant, not less than 14 days before it enters into the tenancy or becomes contractually bound, whichever is earlier, and the subtenant then makes a simple declaration in the prescribed form. If less than 14 days’ notice is given, the notice must still be served before the subtenant is bound, and the subtenant must make a statutory declaration instead (SI 2003/3096, Schedule 2, paragraphs 2 to 4).

StepWhat section 38A requiresSource
TimingThe agreement is made about a tenancy that is to be granted for a term of years certain, so before the sublease is granted.s.38A(1)
NoticeThe landlord serves a notice in the Schedule 1 form, or substantially in that form. It must be served before the subtenant is bound.s.38A(3)(a); SI 2003/3096 Sch 2 paras 2 and 4
ConditionsThe Schedule 2 requirements are met: a simple declaration after at least 14 days’ notice, or a statutory declaration if the notice is shorter, and the notice, the declaration and the agreement referred to in or endorsed on the sublease.s.38A(3)(b); SI 2003/3096 Sch 2
Effect of a failureThe agreement is void.s.38A(3)

What should a tenant check before subletting?

Work through these points before you agree a sublease:

  • Check the subletting clause in the lease for a consent requirement (LTA 1988 s.1(1)).
  • Apply in writing, so that the landlord’s time limit to decide starts (section 1(3)).
  • If the subtenant is to be contracted out of the 1954 Act, make the agreement before the sublease is granted and check that the notice is served in the statutory form (section 38A).
  • Read the rest of the lease for any other restriction on sharing possession, since the Code’s recommendations do not bind the landlord (RICS Code, Part 3 para 6.6).
  • Check whether your own landlord, or a superior landlord, must consent: the 1988 Act duty falls on the person whose consent the covenant requires (section 1(2)).
  • The 1954 Act applies to a tenancy of premises that the tenant occupies for the purposes of its business (section 23(1)), so check who will occupy them, and for what, before relying on any protection.

Questions

Do I need my landlord’s consent to sublet a business lease?
Usually, if the lease requires it. Section 19(1)(a) of the Landlord and Tenant Act 1927 means the landlord must not unreasonably withhold consent, and section 1 of the Landlord and Tenant Act 1988 sets the landlord’s duties once you apply in writing.
Can a subtenant of business premises have security of tenure under the 1954 Act?
It can. A sublease is a tenancy for the Act’s purposes (section 69(1)), so if the subtenant occupies the premises for its business (section 23(1)) it can have security of tenure, unless it is excluded by an agreement under section 38A.
Can I contract out of the 1954 Act for a sublease?
Yes, by agreement under section 38A, if the agreement is made before the sublease is granted, the statutory notice is served before the subtenant is bound and the Schedule 2 requirements (a declaration by the subtenant) are met. Otherwise the agreement is void.
Does the RICS Code for leasing business premises cover subletting?
Yes, as good-practice recommendations rather than mandatory rules. Part 3, paragraphs 6.3, 6.4 and 6.6 of the Code say what leases should allow, and the Code’s scope excludes premises intended to be wholly sublet by the tenant.

Planning to sublet part of your lease?

Tell us about the lease and the proposed subtenant. An independent solicitor you instruct can check the consent process and whether the sublease should be contracted out. Instrukt introduces independent SRA-regulated solicitors; it is not a law firm.

Speak to a solicitor

Sources

This guide is general information, not legal advice. Instrukt is not a law firm.