As far as can be determined there is no direct legal link between the street naming/numbering function and the planning and building control functions.
A property is not required to have an official address for a planning application or building regulation application to be submitted or decisions to be made.
Authorities may choose to be proactive in sourcing information about planning and building control applications and consents to plan their SNN workload. Some local authorities include informatives on their planning decision notices requesting the applicant make a SNN application and give details about how to do this.
It is understood that some local authorities receive street naming and numbering applications without planning permission having first been granted or even applied for. This appears to be in circumstances where works might have been undertaken without planning consent and retrospective consent is applied for. It is therefore advised that local authorities should take considerable care in determining any application before a planning decision is made. The risk is that in determining the street naming and numbering application the local authority could risk a challenge on the basis of pre-determination of the planning application. Authorities should adopt a risk-based approach involving early engagement with the planning or building control function (as appropriate) so that an informed decision as to how to handle an SNN application is taken. It is not considered advisable to make a street naming and numbering decision that is “conditional on” or “subject to” planning permission being granted or that is stated to “void” if planning permission is not granted. Please also refer to the following document: GeoPlace DEC-Addresses, Version 3.4, September 2016 at https://www.geoplace.co.uk/helpdesk/library