Planning Permission for a Porch
Houses (including Bungalows)
The planning rules for porches are applicable to any external door to the dwellinghouse.
You need to apply for planning permission when:
the ground floor area (measured externally) would exceed 3m2.
any part would be more than 3m above ground level
any part of the porch would be within 2m of any boundary of the dwellinghouse with the highway.
Flats, Maisonettes and Shops
If your property is a flat or maisonette (including those converted from houses) or a commercial property, such as a shop or public house you will need to apply for planning permission to add a porch.
If you live in a listed building, you will need listed building consent for any significant works whether internal or external or in the grounds (curtilage) even if you do not require planning permission.