A shop and an upstairs flat can need different EPC assessments. The boundary between the premises matters more than the postal address. This guide is written for practical decision-making and links to the sources used for verification.
One building does not always mean one certificate
A high-street owner selling a shop with a flat upstairs often asks for ‘an EPC for the building’. That can be the wrong instruction. The government’s non-domestic EPC guide gives a shop with a separately accessed, self-contained dwelling above as a clear example: the flat needs its own domestic EPC and the shop needs a non-domestic EPC, even if the two are sold or let together.
The assessment method, assessor accreditation and certificate are different for the two spaces. Ordering only the shop certificate can leave the residential part undocumented; ordering only the flat certificate does not cover the retail unit.
When the upstairs rooms are not a separate flat
Now change the layout: the upstairs accommodation can be reached only through the shop and is not designed or altered as a separate dwelling. The same government guide treats that example as a single non-domestic building assessed together. A private staircase, separate entrance, kitchen and bathroom are therefore worth describing accurately, but no one feature should be used as a shortcut for a complex layout.
There are other borderline cases. An office that was once a room in a house may still be assessed as part of a dwelling if it can readily return to domestic use and the living area remains substantial. The right scope follows the actual design, occupation and transaction, not what the agent calls the address.
Send the assessor the boundary, not just the postcode
Before obtaining a quote, provide the floor plan, current use of each floor, access routes and whether the shop and living accommodation have independent heating or meters. Tell the assessor exactly what is being sold or let. Existing EPC reference numbers can be checked on the official register, but verify that they describe the right unit and remain current.
A photograph of a front door may help explain access. It does not resolve the building-unit question by itself. If the property has been subdivided, converted or extended, flag that work; it may change the assessment scope and the relevant building-control evidence.
- Plans showing shop, dwelling and any common areas
- Separate or shared entrances and fixed services
- What is being marketed: shop, flat or both
- Existing EPCs and any conversion documents
Book the appropriate assessment
CertifyEPC can coordinate a commercial EPC for the shop and, where required, a domestic EPC for the separate flat. Send the address and a simple layout description and we can establish the scope to quote. Unusual mixed-use premises should be assessed on their facts by accredited assessors rather than forced into a one-certificate rule.
Research and verification
Authoritative sources
Use these primary and specialist sources to check the current rule and read further.
Requirements can change and unusual properties may need specialist advice. Check the latest official source and the facts of the property before relying on a compliance conclusion.


