There are a number of issues in addition to those directly connected to the planning and building control regimes that you should consider before starting work.
Even if your development does not require planning permission, it may be liable to pay the Community Infrastructure Levy. Click here to find out more.
It is advisable to consult any neighbours who might be affected by your proposal, and the local parish, town or community council. In more complicated cases, you should consider consulting other bodies who might have an interest.
Alterations and additions to buildings or land may make you more vulnerable to crime than you realise.
Despite your work being granted planning permission (or being covered by permitted development rights) and complying with building regulations you may still require additional permissions for your proposals.