Street naming and numbering
7. Renaming or renumbering buildings
Renaming/renumbering existing buildings is normally only considered when changes occur which give rise (or are likely to give rise) to problems for the occupiers, Royal Mail or Emergency Services etc.
Requests to apply for a change of address for other reasons than the above, will be considered on a case by case basis. They'll incur a fee of £209 to cover the costs of administration, consultation, correspondence and investigation of the current addressing issues.
Your initial street naming and numbering process does not attract a fee. In instances where a development/scheme has already been named and numbered and a change is requested, a fee of £209 is payable.