You may need to apply for advertisement consent to display an advertisement bigger than 0.3 square metres (or any size if illuminated) on the front of, or outside, your property (be it a house or business premises).
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'.
be kept clean and tidy
be kept in a safe condition
have the permission of the owner of the site on which they are displayed(this includes the Highway Authority if the sign is to be placed on highway land)
not obscure, or hinder the interpretation of, official road, rail, waterway or aircraft signs, or otherwise make hazardous the use of these types of transport
be removed carefully where so required by the planning authority.
For further advice call: 01282 451428