Who Is Legally Responsible for a TM44 Certificate?

Landlord vs Tenant vs Managing Agent (UK Compliance Guide 2025–2026)

If you manage or occupy a commercial building with air conditioning, there is one question that keeps causing arguments, delays, and fines:

Who is legally responsible for a TM44 certificate?

Is it the landlord?
The tenant?
Or the managing agent who “handles compliance”?

The frustrating part is that many people assume the lease gives the answer. In real life, it is often more complicated. Responsibility depends on control of the air conditioning system, and control does not always follow who pays the invoice.

This guide explains TM44 legal responsibility clearly, using practical examples and the real situations we see across offices, retail units, multi-let buildings, and managed portfolios.

If you are here because you want a simple answer, here it is:

The party in control of the air conditioning system is usually the party responsible for TM44 compliance.

Now let’s break down what “control” actually means.

Quick answer: who is responsible for TM44?

In most cases:

• Landlord is responsible when the system is part of the building, shared between tenants, or maintained under service charge arrangements.

• Tenant is responsible when the system is installed and controlled by the tenant, and only serves their demised space.

• Managing agent is usually not legally responsible, but they can be operationally responsible and exposed to complaints if they ignore compliance.

If you are unsure whether your building even needs TM44, check this guide first:
Do I need a TM44 inspection?
https://tm44.uk/news-blog/do-i-need-a-tm44-inspection-uk-compliance-guide/

What is a TM44 certificate and why does it matter?

A TM44 inspection is a mandatory inspection of qualifying air conditioning systems, normally where the combined rated output exceeds 12 kW. The inspection looks at:

• How efficiently the system runs

• Whether controls are correct

• Whether maintenance is adequate

• How much energy may be wasted

• Practical recommendations to improve efficiency

A TM44 certificate is not only a piece of paper. It is a compliance document that can be requested by enforcement bodies, and it can also be used internally to drive savings and reduce energy waste.

If you want the full step-by-step process of what the assessor actually does on site, this is your best internal reference:
What happens during a TM44 inspection?
https://tm44.uk/news-blog/what-happens-during-tm44-inspection/

The rule that decides responsibility: control of the system

When people ask “Who is responsible for TM44?” they usually want a simple label like “landlord” or “tenant.”

In practice, the real question is:

Who controls the air conditioning system day-to-day?

Control usually means one or more of the following:

• Who owns the system (or who owns the landlord plant)

• Who decides when it runs

• Who sets temperatures and schedules

• Who arranges maintenance and servicing

• Who repairs or replaces equipment

• Whether the system is shared or exclusively used by one occupier

Once you identify control, responsibility becomes clear.

When the landlord is responsible for TM44

The landlord is commonly responsible when the air conditioning system is part of the building’s base services, or when it is shared.

Landlord responsibility is likely when:

• The building has a centralised system (chiller, AHU, shared plant)

• The system serves common parts or multiple tenants

• Maintenance is arranged by the landlord or managing agent

• Costs are recovered through service charge

• Tenants cannot independently replace or change the main system

Typical examples:

• Multi-tenant office buildings with central cooling

• Shopping centres and retail parks with shared plant

• Mixed-use buildings where landlord plant serves multiple areas

• Buildings with landlord VRF systems feeding multiple units

In short: if it is “building infrastructure,” landlord responsibility is often the default.

If you manage multiple sites and want to keep things consistent across a portfolio, this service page is the most relevant:
TM44 Portfolio Management
https://tm44.uk/tm44-portfolio-management/

When the tenant is responsible for TM44

Tenants can be responsible when the AC system is installed, controlled, and maintained by the tenant, and the system only serves the tenant’s space.

Tenant responsibility is likely when:

• The tenant installed the air conditioning during fit-out

• The system only serves the tenant’s demised area

• The tenant controls maintenance and servicing

• The landlord is not involved in operation or repairs

• The system is not connected to shared building plant

Typical examples:

• Retail units with split systems installed by the tenant

• Restaurants with their own comfort cooling

• Standalone office floors with tenant-owned systems

• Industrial units with tenant-controlled HVAC

If a tenant has full control, the tenant is usually the responsible party.

Managing agents: responsible for action, not always legally liable

Managing agents are often the people actually arranging the inspection. So it is normal for tenants or landlords to assume the managing agent “is responsible”.

Most of the time, managing agents act on instructions from the building owner, freeholder, or landlord.

Managing agents are usually:

• Administratively responsible (organising compliance)

• Operationally responsible (coordinating access)

• Not the legal “duty holder” (unless they also control the system)

However, managing agents can still be caught in the middle if:

• A landlord assumes the agent has booked it

• A tenant assumes the landlord is covering it

• Nobody acts, and enforcement happens

This is why managing agents benefit massively from having a clear compliance plan and renewal schedule, especially for multi-let assets.

If you are dealing with urgent deadlines or enforcement pressure, this page is the most relevant internal link:
Emergency TM44 24–48 Hour Service
https://tm44.uk/emergency-tm44-24-48-hour-service/

Who pays vs who is responsible (not the same thing)

This point matters because it causes the most disputes.

The lease might decide who pays. The law cares who is responsible.

You can have situations like:

• Landlord is responsible, tenant pays via service charge

• Tenant is responsible, landlord reimburses as part of a deal

• Both parties share cost, but one party is still the duty holder

Payment is a financial arrangement. Responsibility is a compliance duty.

The big decider: shared systems vs demised systems

This is where most buildings get confused.

Shared systems

Shared systems are systems serving more than one occupier or the common parts.

Shared systems often mean:

• Landlord responsibility

• One inspection strategy can cover the shared plant

• Planning and access coordination matters

Demised systems

Demised systems are systems that belong to and serve one occupier only.

Demised systems often mean:

• Tenant responsibility

• Multiple tenants may need separate TM44 inspections

• Asset registers and site information become important quickly

If you want a structured way to keep records clean, these two pages support this topic extremely well:
TM44 Register
https://tm44.uk/tm44-register/
What is the TM44 Register?
https://tm44.uk/what-is-the-tm44-register/

What about FRI leases?

FRI leases (Fully Repairing and Insuring) are one of the biggest sources of confusion.

People hear “FRI” and immediately think “tenant is responsible for everything.”

In reality, TM44 responsibility still depends on control of the air conditioning system, not just the lease label.

Here’s a clean way to think about it:

• If the tenant controls and maintains their own systems, tenant responsibility is likely.

• If the landlord controls shared systems or landlord plant, landlord responsibility is likely.

• If the lease is unclear and systems are mixed, you need a quick system review and a sensible inspection plan.

This is why we often recommend a short pre-check of the asset list and system layout before the inspection takes place.

What happens if nobody can prove responsibility?

If enforcement happens, the authority will not accept “we thought the other party was doing it” as a defence.

In disputed situations, responsibility is often assessed using evidence such as:

• Equipment ownership and service records

• Maintenance contracts and invoices

• Building O&M manuals (where available)

• Asset registers and plant schedules

• Who has access to controls and plant rooms

• Who arranged previous TM44 inspections

This is also why getting your TM44 done properly matters. A clear report, correct system identification, and correct scope reduce future disputes.

To understand how TM44 documentation works after the inspection and how it is lodged, link to this page:
TM44 Certificate & Government Lodgement
https://tm44.uk/tm44-certificate-government-lodgement/

Real-world scenarios: landlord vs tenant vs managing agent

Here are the most common setups we see.

Scenario 1: Multi-let office with shared VRF system

• Landlord owns the plant

• Tenants control zones but not the main plant

• Maintenance arranged under service charge

✅ Landlord responsibility is most likely.

Scenario 2: Retail unit installs split AC during fit-out

• Tenant purchased and installed the system

• Tenant controls operation and servicing

✅ Tenant responsibility is most likely.

Scenario 3: Shopping centre with landlord plant and multiple tenant areas

• Central plant, shared services, managed maintenance

• Tenants benefit but do not control core plant

✅ Landlord or centre owner responsibility is most likely.

You already have a sector guide that can support this angle without overlinking:
TM44 Inspections for Retail Chains & Shopping Centres
https://tm44.uk/news-blog/tm44-inspections-retail-chains-shopping-centres/

Scenario 4: Managing agent is asked to “sort TM44”

• Agent is organising, but building owner is the duty holder

• Responsibility stays with whoever controls the system

✅ Agent is operationally responsible, but legal responsibility usually sits with landlord or controlling party.

Scenario 5: Tenant occupies entire standalone building

• Tenant controls plant, maintenance, operation

• No shared systems

✅ Tenant responsibility is most likely.

What are the risks if you get TM44 responsibility wrong?

There are direct and indirect risks.

Direct risks:

• Enforcement requests and compliance notices

• Fines for non-compliance

• Repeat penalties for ongoing breaches

Indirect risks:

• Delays in property sales, refinancing, or lease events

• Disputes between landlords and tenants

• Extra cost due to urgent bookings and rushed access planning

• Lost time for facilities teams

You already have a strong enforcement page that supports this section naturally:
TM44 Fines in 2025
https://tm44.uk/news-blog/tm44-fines-2025/

If a reader is panicking and needs fast action, this is the best place to send them:
Get a TM44 Quote
https://tm44.uk/get-quote/

How to confirm responsibility quickly (simple checklist)

If you want to confirm responsibility without weeks of emails, use this checklist.

Step 1: Identify whether the system is shared or demised

• Does it serve more than one occupier?

• Does it serve common parts?

Step 2: Confirm who maintains it

• Who books the service visits?

• Who pays the maintenance contractor?

• Who holds the maintenance contract?

Step 3: Confirm who controls operation

• Who controls schedules and setpoints?

• Who has access to plant rooms and BMS?

• Who authorises upgrades?

Step 4: Check the lease, but do not rely on it alone

• Look for HVAC clauses

• Look for service charge wording

• Look for “tenant-installed systems” clauses

If any of this is unclear, get a quick professional review of your system list and site setup. It is usually faster and cheaper than guessing and risking enforcement.

How to avoid problems long-term (best practice)

The organisations that never struggle with TM44 responsibility usually do three things:

1. Keep an updated asset register

2. Assign responsibility per building and per system type

3. Set renewal reminders before certificates expire

If your business is also working towards better energy ratings, you can link this topic naturally to your MEES support page:
MEES Compliance Support
https://tm44.uk/mees-compliance-support/

And for wider building energy obligations, this is a relevant supporting page too:
Energy Performance Certificate (EPC)
https://tm44.uk/energy-performance-certificate-epc/

A quiet note about choosing the right TM44 provider

Not all TM44 inspections are equal.

A strong TM44 inspection should:

• Correctly identify systems and scope

• Provide clear recommendations that reduce energy waste

• Produce a report that is easy to defend if questioned

• Avoid vague or incomplete asset listings

• Support portfolio-level planning where needed

If you want to understand how experienced assessors approach compliance and reporting, these two pages fit this article perfectly without overlinking:
TM44 Consultant
https://tm44.uk/tm44-consultant/
TM44 Specialist UK
https://tm44.uk/tm44-specialist-uk/

If your situation is urgent, or you have multiple systems across a portfolio, request a quote and include your asset list if you have one:
https://tm44.uk/get-quote/

Summary: landlord vs tenant vs managing agent

Let’s make it crystal clear.

Landlord is usually responsible when:

• Systems are shared

• Systems are part of building infrastructure

• Maintenance is handled through service charge

• Tenants do not control core plant

Tenant is usually responsible when:

• Systems are installed by tenant

• Systems only serve tenant space

• Tenant controls operation and maintenance

Managing agent is usually:

• Responsible for coordination

• Not the legal duty holder unless they control the system

• Still exposed if they ignore clear compliance requirements

If you are unsure, the fastest fix is a short system review and a planned inspection strategy. It avoids disputes, avoids delays, and keeps compliance clean.

Next step (soft CTA)

If you want a quick answer for your building or portfolio, use our quote form and share:

• Site address

• Building type

• Known system types (split, VRF, chiller, AHU)

• Any asset list you have

Get a TM44 quote in 60 seconds:
https://tm44.uk/get-quote/

Optional “related reading” block (add at the end of the post)

• Do I need a TM44 inspection?
  https://tm44.uk/news-blog/do-i-need-a-tm44-inspection-uk-compliance-guide/

• What happens during a TM44 inspection?
  https://tm44.uk/news-blog/what-happens-during-tm44-inspection/

• TM44 fines and enforcement (2025)
  https://tm44.uk/news-blog/tm44-fines-2025/

• Emergency TM44 inspections (24–48 hours)
  https://tm44.uk/emergency-tm44-24-48-hour-service/

• TM44 certificate and government lodgement
  https://tm44.uk/tm44-certificate-government-lodgement/

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.