Government has defined specific works as 'permitted development', for which, in general, you do not need to apply for planning permission. These are set out in the Town and Country Planning (General Permitted Development) Order 1995 (GPDO). If you are unsure if you need to seek planning permission:
for works to dwelling houses or in their gardens, there is a form to obtain the Council's written view on the need for permission (117Kb)
.
Your responsibilities as owner of land and buildings are summarised here (this is an external hyperlink)
If in doubt please contact Development Control, Regulatory Services, Civic Offices, Civic Way, Fareham, PO16 7AZ or email planningadvice@fareham.gov.uk.