Multiple residences in the UK are sub-premises situated within multiple occupancy buildings.
Each of these premises do not have their own publicly available delivery point (e.g. one letter box, mailing point, etc). Instead they have a shared delivery point that belongs to a parent premise listed on the Postcode Address File (PAF).
This is an important distinction because Royal Mail provides two datasets:
Below are a few illustrations to gain a better understanding of the differences between a multiple residence premise and a normal residence premise.
In this diagram every apartment has it's own publicly accessible letterbox. So each apartment will be listed on PAF and not on the MR dataset.
In this diagram, there are 6 apartments. However, a single mailbox is shared between residents. This mailbox is listed in PAF and the 6 apartments are listed in the MR dataset.
Note that it is often not the case that dwellings which in the same building can only be found in the MR dataset.
PAF, for example, contains the addresses of over 1.9 million flats in the UK. This is because established buildings which provide multiple dwellings, often create individual delivery points for each household.
A typical example is a three-storey residential premise converted into flats where the building owner has yet to assign individual delivery points to each flat. This building will have a single delivery point (i.e. the building’s address) which is listed on PAF; however it will also have dwellings which share the same delivery point (e.g. Basement flat, Flat 1, Flat 2), which will only be listed on the MR dataset.
A number of premises can be considered multiple residences, such as student accommodation, businesses in a shared building or multiple households with a single letter box.
Around 180,000 (0.6%) PAF premises will have multiple dwellings attached to a single delivery point. Of these premises, the average number of additional dwellings is 4.
It is important to identify multiple residences as your business could be missing out on accurate address data. By adding a MR Dataset to your address validation software, you would be able to keep track of these separate premises.
PAF alone will be adequate to identify a premise for most use cases, like completing the delivery of mail or parcels.
In the case of addresses listed under the MR dataset, any deliveries typically are forwarded internally by a postmaster (or equivalent) to the correct occupant. This can be done by specifying either the addressee and the PAF address or the addressee and the MR address.
MR, on the other hand, is ideal for establishing the exact number of households within a particular premise. Typically, public utilities (ISPs, water, energy) would like to know how many potential customers reside at an address.
More information on additonal response fields using the multiple residence dataset is available in our documentation.
Royal Mail levy additional licence fees if you wish to query the MR dataset.
For us, this generally results in an additional cost of 0.5p per lookup. This fee is levied upon a search (i.e. regardless of whether MR data is returned).
If you wish to access MR data you can either create a new key with this enabled or ask us to convert an existing key.
A MR has its own unqiue code UMPRN. You can query for a MR premise by UMPRN using our
Since every MR premise also belongs to a parent premise listed on PAF, it also shares the same UDPRN with that premise.
You can query for a UDPRN and UMPRN address below and see for yourself: