Leasing Authority Agreements in the UK: What Landlords and Agents Should Include

If you are a landlord appointing an agent to market and negotiate a commercial letting, or an agent taking instructions for a landlord client, the leasing authority agreement is where a lot of avoidable risk starts. Problems usually show up later, when the parties realise they never clearly agreed who could approve heads of terms, who pays marketing costs, whether the agent can bind the landlord, or when commission becomes payable.

Common mistakes include relying on informal email instructions, using a short form authority that says nothing about exclusivity, and assuming the agency wording matches the lease strategy for rent reviews, incentives, guarantors or break rights. Another frequent issue is signing a standard authority that gives wide discretion to the agent without clear reporting obligations or approval limits.

This guide explains what a leasing authority agreement means in the UK, the legal issues to check before you sign, the clauses landlords and agents should include, and the practical mistakes that often cause disputes once a tenant is found.

Overview

A leasing authority agreement is the document that sets out what a letting agent can do for a landlord in relation to securing a tenant for commercial premises. It should define the agent’s authority, the scope of services, approval limits, fees, liability boundaries and how instructions are given and confirmed.

• Who the agent is acting for, and whether the appointment is sole, joint or non-exclusive
• Exactly what authority the agent has to market, negotiate, receive offers and agree heads of terms
• Which matters need landlord sign-off before anything is promised to a prospective tenant
• How commission is calculated, when it is earned, and what happens if the deal falls through
• Who pays for marketing, property particulars, viewings, due diligence and external advisers
• How tenant deposits, holding monies or other funds will be handled, if relevant
• What records, updates and reporting the agent must provide during negotiations
• How the appointment ends, including notice, post-termination commission and handover obligations

What Leasing Authority Agreement Means For UK Businesses

A leasing authority agreement is not just an admin form. It is the contract that controls the relationship between the landlord and the leasing agent, and it often determines who carries the risk when negotiations go wrong.

For a landlord, the agreement decides how much freedom the agent has before the landlord signs a lease. For an agent, it provides the legal basis for acting, claiming commission and proving the limits of the instructions received.

What the agreement usually covers

In a UK commercial leasing context, the authority commonly covers the agent’s role in marketing the premises, speaking with interested tenants, arranging viewings, collecting information about offers and negotiating headline commercial points. It may also cover preparation of marketing material, liaison with solicitors, and support through to completion.

That does not automatically mean the agent can legally bind the landlord to a lease or final deal terms. The agreement should say clearly whether the agent can only negotiate, or whether the agent has authority to accept specific terms on the landlord’s behalf.

Authority matters because verbal promises can cause real problems

If an agent tells a prospective tenant that a landlord will accept a rent-free period, fit-out contribution or break option, the landlord may later say that was never authorised. Even if the statement does not create a final lease, it can still create commercial confusion, delay and disputes about responsibility.

This is where founders and property-owning SMEs often get caught. They assume the lease itself is the only document that matters, but the earlier authority document often shapes expectations and can affect who bears the cost of a failed transaction.

Why this matters for SMEs and growing businesses

Many small and mid-sized businesses in the UK hold property through a trading company, an SPV or a family-owned property vehicle. If the wrong entity signs the leasing authority agreement, or if the signatory does not have authority under the company’s internal rules, the appointment can become messy very quickly.

Before you sign, confirm:

• Which legal entity owns the property or has the right to grant the lease
• Whether a director, member, trustee or asset manager has authority to appoint the agent
• Whether there are lender, superior landlord or investor restrictions affecting the letting
• Whether the proposed lease terms must fit an existing property strategy, valuation position or finance covenant

Those issues are especially relevant if the landlord is offering incentives, agreeing tenant works, or dealing with a premises that already has occupational, planning or title constraints.

Commercial leases often involve more than finding a tenant

A good leasing authority agreement should match the commercial lease process that follows. If the landlord wants a minimum term, personal guarantee, rent deposit deed, service charge provisions, reinstatement obligations or restrictions on assignment, the agent needs to know that at the start.

Otherwise, the tenant may be marketed a deal that is never likely to pass legal review or a commercial lease review. That wastes time and can make the landlord look inconsistent. It can also leave the agent arguing that the instructions were not properly defined.

Legal Issues To Check Before You Sign

Before you sign a leasing authority agreement, make sure it says exactly what the agent can and cannot do, how fees work, and which lease terms are subject to final approval. The main risk is assuming the authority is narrow when the drafting gives the agent much wider room to act.

1. Scope of authority

The agreement should spell out whether the agent can:

• Market the premises and prepare particulars
• Arrange and conduct viewings
• Receive and communicate offers
• Negotiate heads of terms
• Recommend acceptance of an offer
• Accept an offer on the landlord’s behalf
• Instruct solicitors or other advisers
• Handle keys, access and tenant due diligence

If authority is limited, say that all final terms are subject to written landlord approval and formal legal documentation. That single point can prevent a lot of confusion.

2. Exclusive or non-exclusive appointment

Commission disputes often start with the appointment structure. A sole agency, sole letting rights or non-exclusive arrangement can produce very different outcomes.

The agreement should make clear:

• Whether only one agent is appointed
• Whether the landlord can market the property directly
• What happens if another agent introduces the tenant
• When a tenant is treated as the agent’s introduction
• How long any protected introduction period lasts after termination

If the wording is vague, the landlord may face competing fee claims from multiple agents.

3. Commission and fee triggers

Do not leave commission mechanics to assumptions. The agreement needs to say when commission is earned and whether payment depends on completion, occupation, payment of rent, or another milestone.

Points to cover include:

• The commission percentage or fixed fee
• Whether VAT is payable in addition
• Whether incentives affect the fee calculation
• Whether renewals, re-gears, assignments or agreements for lease are included
• Whether commission is repayable if the lease terminates early
• Whether abortive costs are payable if the deal falls over

For example, if a landlord offers a substantial rent-free period, it should be clear whether the fee is based on headline rent or net effective rent.

4. Approval of heads of terms

Heads of terms are usually not the final lease, but they set the direction of the transaction. If an agent is negotiating them, the agreement should state which terms always require landlord sign-off.

These often include:

• Rent and review mechanism
• Lease term and any break rights
• Permitted use
• Tenant incentives
• Fit-out contributions and works
• Security package, such as a guarantor or rent deposit
• Repairing obligations and service charge position
• Alienation rights, including assignment and subletting

That is particularly important before you sign a lease on a unit where service charge exposure, reinstatement obligations or use restrictions can materially change the deal value.

5. Compliance with wider property constraints

The agent’s authority should not ignore title, planning, lender or superior lease restrictions. A tenant may want a use that sounds attractive commercially, but the landlord may not be able to allow it.

Before you sign, confirm whether the agent needs to be told about:

• Planning use limitations
• Restrictive covenants on title
• Superior landlord consent requirements
• Lender consent requirements
• EPC and building compliance issues
• Existing occupier rights or car parking limitations

If these restrictions are not reflected in the authority instructions, the agent may market a deal the landlord cannot actually deliver.

6. Standard of care and liability

The agreement should set expectations for how the agent performs the role. This is not about guaranteeing a letting, but it should address competence, honesty, accuracy of marketing material and compliance with professional obligations.

Landlords often want clauses requiring the agent to exercise reasonable skill and care, keep records, avoid misleading statements and maintain appropriate insurance. Agents usually want sensible limits on indirect loss and a clear statement that legal advice and final lease drafting sit with solicitors.

7. Conflicts of interest and dual agency issues

If the agent also acts for the prospective tenant, a group company or another landlord in the same scheme, conflict issues can arise. The agreement should say what disclosures must be made and what consents are needed.

That matters in practice when incentives, side letters or confidential rent positions are being discussed. Landlords should know when the agent is wearing more than one hat.

8. Data handling and confidentiality

Commercial lettings can involve sharing financial statements, contact details, IDs, guarantor information and business plans. The agreement should deal with confidentiality and data handling in a practical way.

It should cover:

• What information can be shared with prospects and advisers
• How tenant and landlord data is stored and retained
• Who is responsible for lawful processing of personal data and data protection compliance
• How confidential offer terms are handled

You do not need a long privacy notice in the authority agreement, but you do need enough clarity to avoid careless information sharing.

9. Termination and post-termination rights

A landlord should be able to end the appointment on clear terms. An agent should also know what happens if negotiations are live when the authority ends.

The contract should address:

• Notice period
• Immediate termination for breach or misconduct
• Return of keys and documents
• Handover of enquiries and negotiations
• Post-termination commission for introduced parties
• Payment of agreed expenses

Protected commission periods need careful wording. If they are too broad, landlords can be tied to a fee long after the relationship ends.

Common Mistakes With Leasing Authority Agreement

The most common mistakes happen when parties treat the authority as a short instruction sheet instead of a negotiated commercial contract. That approach usually creates uncertainty over authority, fees and responsibility once a tenant is in the frame.

Using a generic form for a complicated property

A standard authority may be fine for a simple letting, but many properties are not simple. Mixed-use sites, serviced premises, retail units with turnover elements, and industrial sites with repair issues all need tailored instructions.

If the property has unusual constraints, the authority should reflect them. Otherwise the marketing process can drift away from what the landlord can actually agree.

Failing to state that lease terms need final legal approval

Landlords often assume everyone knows a lease is subject to solicitor review. That assumption is risky. The authority should say clearly that no lease, agreement for lease, licence to occupy, side letter or incentive package is binding until formally approved and documented.

This is particularly important before you rely on a verbal promise made during negotiations or a loosely worded email from an agent.

Not aligning the authority with the intended lease package

If the landlord expects a rent deposit deed, guarantor, authorised guarantee agreement position, reinstatement obligations or fit-out controls, the agent needs those instructions early. Leaving them until legal drafting can derail the deal or force a late renegotiation.

From the tenant’s perspective, late changes feel like backtracking. From the landlord’s perspective, they may be essential protections. The authority agreement should reduce that gap.

Vague wording on introductions and commission

Disputes often arise where several parties had some involvement in bringing in the tenant. Was it the agent who made the effective introduction, or did the landlord already know the occupier? Did another agent show the premises first? Did a previous negotiation restart months later?

The contract should define introductions carefully and say what evidence counts. A simple record of enquiries, viewings and offers can make a big difference if a fee dispute later appears.

Ignoring incentive costs and approval thresholds

An agent may negotiate attractively to secure a tenant, but a landlord may not want the agent offering incentives above a specific value. If there is no approval threshold, tension quickly follows.

Before you sign, agree limits for:

• Rent-free periods
• Capital contributions
• Fit-out allowances
• Landlord works
• Agent-incurred marketing spend
• Use of external consultants

That helps both sides. The agent knows the guardrails, and the landlord avoids surprises.

Overlooking who can give instructions

Many SMEs have multiple stakeholders involved in property decisions, such as directors, founders, asset managers and finance teams. If the agreement does not identify who can give binding instructions, agents may receive conflicting messages.

The authority should name the decision-makers and set out how approvals must be given, ideally in writing. That is especially useful where a landlord owns several sites and different people manage day-to-day communications.

Forgetting about side arrangements

Some deals involve car parking licences, storage areas, signage rights, fit-out periods, exclusivity clauses or short-term occupation before lease completion. If these side arrangements are in play, the agent needs clear instructions on whether they can be discussed and on what terms.

They should not be left floating outside the authority agreement if they are likely to affect value or risk.

FAQs

Does a leasing authority agreement let an agent bind the landlord to a lease?

Not necessarily. It depends on the wording. Many agreements allow the agent to market and negotiate only, with final lease terms subject to written landlord approval and formal legal documents.

Should commercial heads of terms be attached to the authority?

Often, yes. A schedule of preferred lease terms or a landlord brief can help define the agent’s mandate and reduce the chance of unauthorised concessions being discussed.

Can an agent still claim commission if the authority has ended?

Sometimes. Many agreements include a protected period for tenants introduced during the appointment. The exact wording matters, especially where negotiations restart after termination.

Does the agreement need to deal with rent deposits, guarantors and incentives?

Yes, if those points are part of the landlord’s leasing strategy. They do not need full lease drafting at this stage, but the authority should make clear what the agent may and may not offer.

What if the property is subject to lender or superior landlord restrictions?

The agent should be told before marketing begins. The authority and instructions should reflect any landlord consent requirements or title restrictions so the property is not offered on terms the landlord cannot deliver.

Key Takeaways

• A leasing authority agreement sets the rules for how a landlord and agent work together to secure a commercial tenant.
• The document should clearly define the agent’s authority, especially around negotiations, heads of terms, incentives and final approvals.
• Commission wording needs careful attention, including introductions, payment triggers, protected periods and abortive costs.
• The authority should match the intended lease structure, including guarantors, rent deposits, break rights, repair obligations and any special property constraints.
• Landlords and agents should record who can give instructions, what must be approved in writing, and how conflicts, confidentiality and termination rights are handled.
• A tailored agreement usually saves time and reduces disputes later, especially before you sign a lease or rely on an informal promise made during negotiations.

If you want help with authority limits, commission clauses, heads of terms approval, and termination provisions, you can reach us on 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.