The majority of porches are considered as a ‘permitted development’ and do not require planning permission. This means that your project can likely be started and finished much quicker that would be the case if a planning application had to be submitted. Porches that will be added to a house will be a permitted development so long as (1) the internal ground floor area does not exceed three square metres; (2) no part of the porch is more than three metres above ground level; (3) no part of the porch is within two metres of any boundary of the dwelling and the highway.
In the same ways that porches often don’t need planning permission, they are commonly exempt from building regulations too, providing that they are less than thirty square metres in size, measured internally. The main front entrance door between the existing house and new porch much remain in situ, and the new porch must not adversely affect any ramped or levelled access. Needless to say the fitting of glazing and any fixed electrical installations much comply with the relevant section of building regulations.