The other is the TM44 inspection certificate. They sound similar. They are not the same, and owners often find out the difference at the worst moment, usually mid-sale. So what is the energy performance certificate cost in London, and which document does your building actually need? Let’s break it down.
What an EPC Shows, and What It Costs in London
An EPC rates a building from A to G on its energy use. You need a valid one before you sell, let or build commercial premises in England and Wales, and the certificate lasts ten years. The energy performance certificate cost in London depends mostly on size and complexity. For commercial property, expect somewhere between roughly £130 and £500 or more. A small unoccupied unit sits at the lower end. A larger multi-floor office climbs higher. Central London quotes tend to run above the national average, partly down to demand and assessor travel.
Watch the rating too, not just the price. Commercial property must reach at least an E rating to be let legally under MEES rules. A poor rating can stall a lease, so the cheapest quote is not always the one that saves money.
Where the TM44 Inspection Certificate Fits
The TM44 inspection certificate covers something narrower: your air conditioning. If a building’s cooling systems have a combined output above 12kW, the law requires an assessment by an accredited assessor. That includes the many small split units that quietly add up past the threshold.
This certificate runs on a five-year cycle, not ten, and the report goes onto the government’s air conditioning inspection register. An enforcement officer can ask to see it at any point. Plenty of owners assume their EPC already covers this. It does not. Tm44
An assessor also flags where the system wastes power, and poorly maintained units can burn far more than they should, so the report sometimes pays for itself.
Putting the Two Costs Side By Side
Here is the short version for a typical commercial site:
- EPC: needed to sell or let, valid for ten years, roughly £130 to £500 plus in London
- TM44 inspection certificate: needed if cooling output tops 12kW, valid for five years, priced by system size and unit count
- Both can often be booked in one visit, which trims travel fees and paperwork.
Book them on one diary date, and you pay one call-out instead of two.
What Does Skipping the TM44 Inspection Actually Cost?
Miss the deadline, and the current fine is £300 per building. That sounds small. It is not, once you scale it. A landlord with ten non-compliant sites faces a £ 3,000 penalty, and the penalty can be repeated until a valid report exists. A further £200 charge applies for failing to hand over the report within seven days of a request.
Not sure whether your air conditioning crosses the 12kW line, or when your last inspection lapsed? Check your status on the government register, then book an EPC and a TM44 inspection together while the diary is open.
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