The House Photographer is qualified to undertake residential EPC’s

What is an EPC?

An EPC is an Energy Performance Certificate and it grades you property from A to G with regards to how efficient it is from an energy point of view.
Currently there are 5 forms of  EPC  split into 2 groups, residential and commercial. More information about commercial EPC’s can be found under the Estate Agent tab.

A residential property is loosely classified as a dwelling where a person or family can live, eat and sleep and it must have it’s own bathroom and kitchen facilities.

There are 2 types of residential EPC’s, the first is for when a new home is being built and is called an ‘On Construction EPC’. It is started before the first brick is laid and uses only the schematic drawings and lists of materials to be used, this method results in a SAP (standard assessment procedure) score.

It is then handed in along with the blue prints to the planning office. Plans cannot be approved until this has been completed. Once the new property has been built the assessor must verify that the building and materials used were as per plan.

The second type is the most common type and is known as an RDSAP EPC (reduced data standard assessment procedure) and is calculated on properties that are already built.

If you are looking to market a property for either sale or rent an EPC must, by law, be displayed along with the property details so potential buyers are aware of the efficiency of a property.

The only exceptions to this rule is if a property is marketed with the intention of it being completely knocked down and a new property erected in its place or if the property is a listed building and therefore restricted to what types of improvements can be made.

How do we calculate a residential EPC score?

An EPC score is calculated and compared to a notional building that has been built to the relevant building regulations at the time of its construction. It also takes into account improvements that have been made such as a new boiler or double glazing.

The key factors are as follows:


  • the size of the property
  • The year the property was built
  • How the property is insulated
  • What materials were used in the construction of the property
  • Are the walls solid or do they have a cavity
  • Property type; terraced, semi detached, detached, bungalow or flat
  • Year any extensions were built and size
  • Year any loft conversions were completed and size
  • The percentage of low energy lights


  • how the property is heated
  • How the heat is controlled in the property
  • What type of heat emitters


  • how the water is heated and stored
  • What insulation the water storage vessel has
  • How the water heating process is managed

A residential EPC can be calculated and a result given in most cases on the same day and normally within an hour, but obviously the size and complexity of the property will have an effect on the time required.

A residential EPC is valid for 10 years so long as there have not been any changes to the heating system, insulation or size of the property.

The House Photographer - Property Photography - Residential EPC

For more information or to book an EPC visit please call or send us a message by using the button below