Street naming and numbering

The importance of street naming and numbering

Accurate and up-to-date details of the names and numbers of streets and properties is essential so that: 

  • Emergency services can locate a property quickly
  • Mail can be delivered
  • Residents and visitors can navigate an area
  • Services and products, such as broadband, can be delivered

Once a property is officially registered, the postal address is confirmed and entered onto the Royal Mail database.

Information for developers

Southampton City Council requires planning permission be granted before the name of streets or addresses can be processed.

Applications for street names and house numbering for new developments should be made as soon as planning application is approved.

Naming of new streets

Where a development leads to the creation of a new street, we will consult with the developer and Royal Mail.

Names with a local association, or those that follow a theme in the area, are favoured by the Council. Names must not be the same or similar to any existing names in the area.

Numbering of new properties

For developments with new streets we assign numbers in a logical sequence based on the street layout. This will normally be with odd numbers on the left and even numbers on the right, from the most important street from which they lead.

Developments on existing numbered streets will be numbered into the existing sequence using suffixes (e.g. 12A and 12B).

Once official postal addresses have been allocated developers must clearly mark all buildings with the correct postal number within the road they are accessed from.

House names

All new properties will be given a number unless they are on a street without a numbering scheme, in which case a name will be agreed with the owner.


Once an address is registered, we will inform Royal Mail. They will only issue new postcodes once they receive a request from us. If you have a postcode enquiry contact Royal Mail on 08456 045060 or

Information for home owners

Changing or adding a house name

We will check the database to ensure that any requested names, or ones that sound similar, are not already in use at another property.

At a named address

Where a property has a name instead of a number you will need to request the name is officially changed.

At a numbered address

The official postal number must be kept as part of the address, but you can apply to add a name. You will be required to enter the requested new name for the property on the form.

At a numbered name and address

The official postal number must be kept as part of the address, but you can apply to change the name. You will be required to enter the requested new name for the property on the form.

Research of address details

We offer a research service for anyone interested in the origin of street or building names, including those that no longer exist. The cost of this service is £100 and is non-refundable, even if no information can be found. Requests can be submitted using the form below.

We reference two books housed in the Special Collections Library - Stories of Southampton Streets and More Stories of Southampton Streets. Information can also be found in Council minutes, of which the library holds a complete collection from 1894 up to today.

For requests where someone is trying to ascertain when a property or street has been renumbered, we can reference any plans that were drawn up showing the proposed sale plots and street layouts.

Both the Special Collections Library and Archives have plans and historic street directories which list, house by house, who lived in the streets from 1850 to 1975.

Apply for street name and numbering

The form below can be used to make an application to change, add or remove a street or property name, or request a research of address.
Time scales vary as to how long each process takes – the form gives estimated completion dates.

There are associated costs for all these services. As payment needs to be taken before the form can be submitted, ensure you have your credit/debit card to hand.

The form will take approximately 10 minutes to complete. Ensure you have all necessary information to hand as there is no facility to save the form part way through.

What you need before you start your application


  • To allocate a suitable number to new or sub-divided properties you will need to submit planning permission with your application.
  • Applications where a development includes new streets will require a proposed street name, in accordance with our guidelines
  • When applying for new streets and naming and numbering of new properties you will need your planning application number.
  • You will need to upload a map/plan of new roads in relation to existing highways. For property numbering the footprint and property boundary will need to be shown in relation to the existing highway with the primary access from the highway clearly marked.

Property owners

  • Ensure you have decided on the new name for your property as you will be required to enter it.

Apply here