In this guide
3. I want to convert my shop to an office (use class B1) or Storage (B8) or other uses
Planning permission would be required for such a material change of use as the proposed new use is a different use class within the planning system.
The majority of local authorities will have designated shopping or commercial areas within their planning policies which often contain policies on striking a balance of uses in an area.
Some authorities may have specific polices to retain a level of retail uses.
Changes in signage are likely to require express advertisement consent.
While permission is not required for the change of use before work starts, if permission is refused the work will have to be undone and the authority may take formal enforcement action over a change of use without planning permission.
You may also require the consent of the landlord or landowner.