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From 1st October 2008, all non-domestic buildings on construction, sale and rent will require a Non-Domestic Energy Performance Certificate (NDEPC) and a Recommendation Report (RR). This information will help owners and occupiers make their building more energy efficient and allow potential buyers and tenants to compare the energy performance of different buildings. This is being phased in from 6th April 2008 for buildings with a floor area of > 10000m². In July 2008, this will extend to buildings with a floor area of > 2500m².

By October 2008, all larger public buildings will require an annual Display Energy Certificate (DEC) highlighting their energy performance. This is to be displayed prominently in a place visible to the public. These buildings will also require an Advisory Report (AR) providing recommendations for energy improvements each seven years.

Air conditioning systems first put into service on or after 1st January 2008 require an air conditioning inspection every five years from the date on which the system was first put into service.

For systems with an effective rated output of more than 250kW put into service before 1st January 2008, an air conditioning inspection is required by 4th January 2009, and every five years thereafter.


All commercial properties require an Energy Performance Certificate when being sold or let. Ratings are often used by tenants or potential buyers to make energy comparisons between properties. A Commercial EPC comes with a recommendation report that outlines how the energy performance of the building could be improved.
An EPC assesses a buildings by giving a standard energy and carbon emission efficiency grade from 'A' to 'G', where 'A'is the best and with the average to date being D/E. Property with the best ratings are more attractive to potential tenants and buyers as they are cheaper to run. Booking an EPC Not having a valid Commercial EPC can be a real inconvenience for both owners and property agents. There is now shared responsibility between agent and commercial landlord to make sure that the property is legal to market by having a valid EPC within 7 days of marketing, if one is not already available, a reduction in time from the original 28 day grace period that was in place before April 2012 legislation came into effect this year with more stringent criteria regarding EPC law.
As well as when a property is to be put up for market an EPC is still required when:
  • A property is viewed
  • Written information is requested
  • Contracts are being exchanged Any commercial property owner that fails to produce a valid commercial EPC is liable to be fined by Trading Standards anywhere between £200 to £5000 per property, depending on the rateable value of the building in question.
Any commercial property owner that fails to produce a valid commercial EPC is liable to be fined by Trading Standards anywhere between £200 to £5000 per property, depending on the rateable value of the building in question.
The following types of properties are exempt from requiring a Commercial EPC:-
  • Places of Worship
  • Temporary structures with a planned use less than 2 years
  • Stand alone properties with under 50m2 useable floor space
  • Properties due for demolition with a demolition order in place
Low energy demand properties e.g. agricultural barns.
A Commercial EPC assessment will be carried out by a certified Non-Domestic Energy Assessor (NDEA), who is qualified to the Level in which the property falls. As well as being qualified each assessor must be accredited by one of the government approved bodies, where they are regularly audited to ensure they are in compliance with the high standards set.
The EPC is calculated by analysing a number of physical attributes of the property focusing on:-
  • Property Size, Age, Type and Construction Materials used
  • Lighting
  • Ventilation
  • Wall and Loft Insulation
  • Windows
Central Heating and Hot Water systems.
  Once the Energy Assessor has the required data, the Commercial EPC can then be processed and the information collated, using the Simplified Building Energy Model interface (iSBEM). This is a government approved, standardised software program used throughout the industry. The package uses a notional building with average running costs as a comparison or control to help calculate the data.
The report is lodged with the central Landmark register on completion and allocated a unique 24 digit Report Reference Number (RRN). A Commercial EPC and Recommendation Report are then drawn up for each commercial property in question.
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