If the property you
are purchasing does not or has not had a road or street
number, then you need to apply to the local council
office - Junta da Freguesia - to be allocated with your
house number (Numero de Policia).
Usually in quiet districts and areas
the council representative will either follow you to
your property or arrive ten minutes after your request.
Although I can't vouch for the system throughout
Portugal, the system in southern
central Portugal for
obtaining your Numero de Policia (house number) is
rather quirky.
On a tertiary road, irrelevant of the
number of houses and buildings present your property number will
be designated by the number of metres from the secondary
or primary road. In our case this was 127, despite being
in a reserve location where no other building can now occur.
We have four neighbours on the hillside with equally
quirky numbers - 38, 468, 27 and 51.
This may not and hopefully is not the
system utilised throughout the country, though it is my
experience of obtaining a Numero de Policia for an
existing building without one.