Planning Portal    1. Do you need permission   2. Common
Projects   3. Adverts and Signs  Adverts and signs  Planning
Permission   Therefore, you are unlikely to need consent for a
small sign with your house/building name or number on it, or
even a sign saying 'Beware of the dog'.  Temporary notices up to
0.6 square metres relating to local events, such as street
parties and concerts, may also be displayed for a short period.
There are different rules for estate agents' boards, but, in
general, these should not be bigger than 0.5 square metres. 
The planning regime for larger, professional adverts, signs for
businesses and so on is complex though all outdoor
advertisements must comply with five 'standard conditions'.
They must:    • be kept clean and tidy   • be kept in a safe
condition   • be removed carefully where so required by the
planning authority.  Outdoor advertisements and signs: a guide
for advertisers  This guide aims to explain to those wanting to
display an outdoor advertisement how the system