TM44 Inspection Services in London for Commercial Buildings
We provide TM44 inspection services in London for commercial buildings, helping organisations comply with UK energy efficiency regulations. Our accredited assessors have extensive experience inspecting complex HVAC systems across offices, retail premises and mixed-use sites throughout London.
- Stay compliant with TM44 regulations and reduce the risk of enforcement action across London properties
- CIBSE accredited TM44 assessors with deep experience of complex commercial buildings and large HVAC systems
- Clear, actionable reports highlighting no/low cost and longer-term upgrade options
- Support for single London buildings and multi-site portfolios with assets across the capital
CIBSE accredited level 3 and level 4 TM44 specialists delivering TM44 inspection services across London.
What is TM44?
A TM44 inspection is a statutory energy assessment of a building’s air conditioning systems, ventilation systems and associated controls.
In London, it commonly applies to multi-let offices, retail, hotels and mixed-use buildings with chilled water systems, VRF/VRV and multiple split systems, where access planning and minimal disruption are key.
The inspection assesses how efficiently your systems are operating and provides recommendations to reduce energy use, carbon emissions and running costs.
The term “TM44” refers to guidance developed by CIBSE (the Chartered Institution of Building Services Engineers), which sets out the methodology and good practice for these inspections.
A typical air conditioning inspection will:
- Review the size, operation and controls of your AC and ventilation systems
- Examine maintenance records and F-Gas related documentation
- Identify inefficiencies and opportunities to improve performance
The output is a TM44 inspection certificate and associated report with clear and actionable recommendations.
The report and certificate are lodged on the government register to ensure compliance.
TM44 regulations and certificate overview
Who needs a TM44 inspection in London?
In London, TM44 inspections are required where the combined effective rated cooling output exceeds 12 kW. This is common in multi-let offices, retail units, hotels and mixed-use buildings with multiple split/VRF indoor units. If you’re unsure, we can review your asset list and confirm whether you’re in scope and when your next inspection is due.
In practice, this means you’re likely to need a TM44 inspection if:
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Your building has a single large chiller or packaged unit with a cooling output above 12 kW, or
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You have multiple smaller air conditioning units whose combined cooling output exceeds 12 kW.
Responsibility usually sits with the building owner, landlord or the person in control of the system (for example, a tenant with full repairing and insuring responsibilities). Failure to have a valid inspection certificate in place can lead to enforcement action and financial penalties from your local authority or trading standards.
If you’re not sure whether your systems are in scope or when your next inspection is due, we can quickly review your asset list and any previous or existing TM44 certificates and reports.
Not sure if your London building qualifies? Contact us and we will confirm.
What’s included in our TM44 inspection London service
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Pre-inspection info request (site details, drawings, asset lists if available)
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On-site inspection (plant, controls, operation, maintenance practices)
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Condition and efficiency observations
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Clear recommendations (quick wins + longer-term improvements)
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TM44 report delivery + compliance guidance
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Support for multi-site scheduling across London
Our standard working days are Mondays to Fridays, with after-hours and weekend options available to limit disruption.
We generally provide draft certificates and reports for review within 5 working days from the site audits, but faster turnarounds can be accommodated upon request.
How a TM44 inspection works
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Quick call / site details
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Inspection scheduled (access planning)
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On-site assessment
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Report issued + recommendations explained
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Ongoing support for follow-up actions
Areas we cover across Greater London
Central London
Covering the City and West End, including Westminster, City of London, Camden, Islington, Kensington & Chelsea, and Lambeth.
East London
Regular coverage across Tower Hamlets (Canary Wharf), Newham, Hackney, Waltham Forest and Barking & Dagenham.
West London
Serving Hammersmith & Fulham, Ealing, Hounslow, Brent and Richmond upon Thames, including key business corridors and sites near Heathrow.
South London
Coverage across Southwark, Wandsworth, Croydon, Greenwich and Lewisham.
Outside Greater London? We also support nearby areas. Contact us with your postcode and system details.
TM44 inspection London pricing
There are various factors that influence the cost of a TM44 inspection in London.
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number and type of air conditioning and ventilation systems
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building size and complexity
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access requirements (roof permits, escorts, out-of-hours)
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single vs multi-site portfolio
Why choose Smart GreenTech for TM44 inspections in London
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CIBSE-accredited TM44 assessors
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Strong experience with London commercial building types
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Clear, actionable reports
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Fast communication and scheduling
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Portfolio delivery for property managers/FM teams
TM44 inspection London FAQs
Book your TM44 inspection in London
If your TM44 certificate is due to expire, you’re not sure whether your system is over 12 kW, or you simply want a more efficient and reliable air conditioning system, we’re here to help.
Call us: +44 (0) 3300 881451
Email:
Or: complete our short form to request a TM44 inspection quote
We’ll confirm whether you need a TM44 air conditioning inspection, provide a clear fixed-fee proposal and agree a schedule that minimises disruption to your building users, helping you stay compliant and improve performance at the same time.