How to Book a TM44 Inspection in the UK (Step-by-Step Guide for 2026)

Booking a TM44 inspection should be simple.
Yet many UK businesses delay it, book it incorrectly, or only take action when fines or enforcement letters arrive.

If you are a building owner, landlord, managing agent, or facilities manager and you are unsure how to book a TM44 inspection, what information you need, how long it takes, or how to avoid delays, this guide explains the process clearly, step by step.

This article shows how to book a TM44 inspection in the UK in 2026, based on how inspections actually work in practice.

How to Book a TM44 Inspection in the UK (Quick Summary)

If you want the short version, the TM44 booking process looks like this:

• Confirm your building requires a TM44 inspection

• Gather basic site and air-conditioning details

• Request a TM44 inspection quote

• Confirm inspection date and access

• Receive your TM44 report and certificate

If you are ready to start, you can request a quote directly via https://tm44.uk/get-quote/

What Is a TM44 Inspection?

A TM44 inspection is a mandatory energy efficiency inspection for air-conditioning systems in non-domestic buildings.

It applies when the combined rated output of the air-conditioning systems exceeds 12 kW.

The inspection:

• Reviews how efficiently your AC systems operate

• Identifies energy waste and improvement opportunities

• Produces a TM44 report and certificate valid for five years

If you want a full explanation, read:
What Is a TM44 Inspection?
https://tm44.uk/news-blog/what-is-a-tm44-inspection/

Who Needs to Book a TM44 Inspection?

You need to book a TM44 inspection if:

• Your building is commercial or mixed-use

• The total AC capacity is over 12 kW

• Your TM44 certificate has expired or is missing

• You are selling, leasing, or managing the property

• You want to stay compliant with UK regulations

If you are unsure about the 12 kW threshold, this guide explains it clearly:
Air Conditioning Systems Over 12kW – TM44 Requirements
https://tm44.uk/news-blog/air-conditioning-over-12kw-tm44-requirements-2025-2026/

Step 1: Confirm That Your Building Requires a TM44 Inspection

Before booking, confirm three things:

Is the building non-domestic?

TM44 inspections apply to commercial buildings. Residential-only properties are excluded unless shared or commercial systems are present.

Is the combined AC output over 12 kW?

Multiple smaller systems are added together. Many sites exceed the threshold without realising it.

Is your TM44 certificate valid?

TM44 certificates are valid for five years.

If you are unsure, this compliance guide helps:
Do I Need a TM44 Inspection? (UK Compliance Guide)
https://tm44.uk/news-blog/do-i-need-a-tm44-inspection-uk-compliance-guide/

Step 2: Gather the Information Needed to Book a TM44 Inspection

To book a TM44 inspection smoothly, have the following ready if possible:

Building details

• Full site address

• Building type (office, retail, warehouse, etc.)

• Approximate size or layout

Air-conditioning details

• System types (split, VRF, rooftop units)

• Approximate number of units

• Asset list or drawings if available

Access details

• Site contact name and phone number

• Access restrictions or permits

• Preferred dates

If you manage complex systems, this article is useful context:
AC Efficiency Problems TM44 Inspectors Keep Finding
https://tm44.uk/news-blog/tm44-ac-efficiency-problems/

Step 3: Request a TM44 Inspection Quote

Once you have the basics, the next step is requesting a quote.

A proper TM44 inspection quote should consider:

• Number of systems

• Site complexity

• Location

• Urgency

You can request a quote here:
TM44 Inspection Quote Request
https://tm44.uk/get-quote/

To understand why quoting early matters, read:
Why Requesting a TM44 Inspection Quote Is the First Step Toward Energy Efficiency
https://tm44.uk/news-blog/tm44-inspection-quote-energy-efficiency-first-step/

Step 4: Choose a Qualified TM44 Inspection Provider

Not all assessors are TM44 qualified.

Before booking, make sure the provider:

• Uses trained TM44 assessors

• Works to CIBSE TM44 guidance

• Issues and lodges certificates

• Explains findings clearly

This article explains how professional providers add value:
How TM44 Inspection Companies Reduce Energy Waste and Operating Costs
https://tm44.uk/news-blog/tm44-inspection-companies-reduce-energy-waste-operating-costs/

Step 5: Book the Inspection Date and Time

After the quote is approved, booking is straightforward.

Most TM44 inspections:

• Take 1–3 hours

• Can be completed during normal working hours

• Do not require shutting down systems

If you need urgent compliance, use the emergency option:
Emergency TM44 Inspections
https://tm44.uk/news-blog/emergency-tm44-inspections-2025/

Step 6: Prepare the Site for the TM44 Inspection

Basic preparation prevents delays.

Before the visit:

• Ensure plant rooms and rooftop units are accessible

• Arrange keys or permits if needed

• Inform site staff

• Have documentation ready

Use this checklist to prepare properly:
TM44 Inspection Checklist
https://tm44.uk/news-blog/tm44-inspection-checklist-2025/

Step 7: What Happens During the TM44 Inspection

During the inspection, the assessor will:

• Review system layout and controls

• Inspect a representative sample of units

• Assess efficiency and suitability

• Identify energy-saving opportunities

For a full walkthrough, read:
What Happens During a TM44 Inspection?
https://tm44.uk/news-blog/what-happens-during-tm44-inspection/

Step 8: Receive Your TM44 Report and Certificate

After the inspection:

• The report is prepared

• The TM44 certificate is issued

• Documentation is provided digitally

If you manage buildings for audits or EPCs, this is useful:
Why Building Managers Rely on TM44 Inspection Companies for EPC and Audit Readiness
https://tm44.uk/news-blog/tm44-inspection-companies-epc-audit-readiness/

Common Mistakes to Avoid When Booking a TM44 Inspection

Avoid these common issues:

• Waiting until enforcement deadlines

• Booking non-qualified providers

• Underestimating system size

• Ignoring expired certificates

For cost comparison, read:
TM44 Inspection Cost vs Non-Compliance Fines
https://tm44.uk/news-blog/tm44-inspection-cost-vs-non-compliance-fines/

For enforcement context, see:
TM44 Enforcement Powers Explained (2026)
https://tm44.uk/news-blog/tm44-enforcement-powers-inspections-fines-2026/

How Much Does It Cost to Book a TM44 Inspection?

Costs depend on:

• Number of systems

• Site complexity

• Location

• Urgency

If your focus is energy savings, this article is relevant:
Top 10 TM44 Fixes That Cut Energy Bills
https://tm44.uk/news-blog/top-10-tm44-fixes-cut-energy-bills-2026/

Why Businesses Choose tm44.uk

Businesses choose tm44.uk because we provide:

• UK-wide coverage

• Qualified assessors

• Clear pricing

• Fast turnaround

• Certificate lodgement

• Ongoing support

If you manage multiple sites, read:
TM44 for Multi-Site Businesses (UK Guide)
https://tm44.uk/news-blog/tm44-for-multi-site-businesses-uk/

👉 Request your TM44 inspection quote today
https://tm44.uk/get-quote/