EPC Fast practical guide · Reviewed 7 November 2026
Start with the demise
Identify whether the instruction covers the entire building, one occupied unit or several premises. Mark the relevant floors and explain shared spaces. The assessor needs to know which premises the output must describe.
Account for shared systems
Heating, ventilation, cooling and other services may be managed for the building rather than the individual unit. Ask who can provide plant information and arrange the relevant access. One occupier may not hold all the records needed.
Describe the transaction
Say whether the record concerns a sale, letting or construction project, and name any other required reports. A non-domestic EPC is not automatically an operational energy audit or an improvement-design package.
Confirm changes to the instruction
If the unit is subdivided, systems are altered or the required output changes, tell the team before relying on the original quote. A clear revision avoids comparing a price for one boundary with work for another.
Before the next instruction
- Address, unit, current use and intended transaction.
- Approximate floor area and the assessment boundary.
- Plans and information about relevant building services.
- Access contact, security requirements and deadline.
This guide helps prepare the enquiry. The actual property, assessment and applicable requirements still need consideration.
Read the relevant official guidance